Searching in a Greek Multiaccent (Polytonic) site (UTF-8)

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Nik2004
Posts: 132
Joined: Mon 9. Aug 2004, 14:31
Location: Athens,Greece

Searching in a Greek Multiaccent (Polytonic) site (UTF-8)

Post by Nik2004 » Wed 16. Jan 2008, 17:02

I am posting this to help other users who may be having problems with searches using greek characters in unicode (UTF8 or UTF-8) sites.

I had posted in the past (http://forum.phpwcms.org/viewtopic.php?f=5&t=10582) how to hack the search system to enable searches in greek language. This hack, however, would work only in sites using Windows-1253 (ISO-8859-7) codepage, and MySQL using greek (encoding) / greek_general_ci (collation).

Now, I am posting a changed hack to support full unicode (UTF-8) sites; MySQL will then also use utf8 encoding plus utf8_general_ci collation.

The problem is that in traditional greek text (ancient, or earlier than 1980) multiple accents and modifiers are used which lead to having all vowels (and certain consonants) being used in a large number of forms (this is also the case in modern greek, but the number of possible forms is small); searching a pattern (a string of characters) thus becomes an impossible task if matching does not exclude accents and modifiers. Actually, this hack applies to any greek site using utf8, even if it's using only modern (monotonic - monoaccent) greek (although the char replacement function would still try to replace all those multiaccent character combinations even though they are not in use, thus achieving slightly suboptimal performance).

After doing this hack, all searches are feasible, no matter what type of greek language is used (of course site and mysql encoding should always be utf8).

So, here is the trick:

In /include/inc_front/content/cnt_functions/cnt13.func.inc.php, we add two functions, at the end of the file:

Code: Select all

function unichr($c) {
    // A generic function to enhance php chr() function to allow handling of unicode characters
    if ($c <= 0x7F) {
        return chr($c);
    } else if ($c <= 0x7FF) {
        return chr(0xC0 | $c >> 6) . chr(0x80 | $c & 0x3F);
    } else if ($c <= 0xFFFF) {
        return chr(0xE0 | $c >> 12) . chr(0x80 | $c >> 6 & 0x3F)
                                    . chr(0x80 | $c & 0x3F);
    } else if ($c <= 0x10FFFF) {
        return chr(0xF0 | $c >> 18) . chr(0x80 | $c >> 12 & 0x3F)
                                    . chr(0x80 | $c >> 6 & 0x3F)
                                    . chr(0x80 | $c & 0x3F);
    } else {
        return false;
    }
}

function unigrchars_replace($text) {
    // convert all greek chars to lower case, non-accented ones for search matching

	$text = str_replace(unichr(7936), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7937), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7938), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND VARIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7939), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND VARIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7940), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND OXIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7941), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND OXIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7942), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7943), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7944), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7945), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7946), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND VARIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7947), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND VARIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7948), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND OXIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7949), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND OXIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7950), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(7951), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(902), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH TONOS ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(913), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(940), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH TONOS ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8064), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8065), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8066), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8067), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8068), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8069), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8070), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PSILI AND PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8071), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH DASIA AND PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8072), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8073), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8074), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND VARIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8075), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND VARIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8076), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND OXIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8077), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND OXIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8078), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8079), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8048), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH VARIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8049), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH OXIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8112), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH VRACHY ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8113), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH MACRON ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8114), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8115), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8116), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8118), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PERISPOMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8119), unichr(945), $text);
			// GREEK SMALL LETTER ALPHA WITH PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8120), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH VRACHY ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8121), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH MACRON ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8122), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH VARIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8123), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH OXIA ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(8124), unichr(945), $text);
			// GREEK CAPITAL LETTER ALPHA WITH PROSGEGRAMMENI ---> GREEK SMALL LETTER ALPHA ("&alpha;")
	$text = str_replace(unichr(914), unichr(946), $text);
			// GREEK CAPITAL LETTER BETA ---> GREEK SMALL LETTER BETA ("&beta;")
	$text = str_replace(unichr(915), unichr(947), $text);
			// GREEK CAPITAL LETTER GAMMA ---> GREEK SMALL LETTER GAMMA ("&gamma;")
	$text = str_replace(unichr(916), unichr(948), $text);
			// GREEK CAPITAL LETTER DELTA ---> GREEK SMALL LETTER DELTA ("&delta;")
	$text = str_replace(unichr(917), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(904), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH TONOS ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(941), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH TONOS ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7952), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH PSILI ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7953), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH DASIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7954), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH PSILI AND VARIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7955), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH DASIA AND VARIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7956), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH PSILI AND OXIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7957), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH DASIA AND OXIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7960), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH PSILI ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7961), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH DASIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7962), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH PSILI AND VARIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7963), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH DASIA AND VARIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7964), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH PSILI AND OXIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(7965), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH DASIA AND OXIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(8050), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH VARIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(8051), unichr(949), $text);
			// GREEK SMALL LETTER EPSILON WITH OXIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(8136), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH VARIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(8137), unichr(949), $text);
			// GREEK CAPITAL LETTER EPSILON WITH OXIA ---> GREEK SMALL LETTER EPSILON ("&epsilon;")
	$text = str_replace(unichr(918), unichr(950), $text);
			// GREEK CAPITAL LETTER ZETA ---> GREEK SMALL LETTER ZETA ("&zeta;")
	$text = str_replace(unichr(7968), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7969), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7970), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND VARIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7971), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND VARIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7972), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND OXIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7973), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND OXIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7974), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7975), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7976), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7977), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7978), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND VARIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7979), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND VARIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7980), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND OXIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7981), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND OXIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7982), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(7983), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(905), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH TONOS ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(919), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(942), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH TONOS ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8080), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8081), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8082), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8083), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8084), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8085), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8086), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PSILI AND PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8087), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH DASIA AND PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8088), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8089), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8090), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND VARIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8091), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND VARIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8092), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND OXIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8093), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND OXIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8094), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8095), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8130), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8131), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8132), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8134), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PERISPOMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8135), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8138), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH VARIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8139), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH OXIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8052), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH VARIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8053), unichr(951), $text);
			// GREEK SMALL LETTER ETA WITH OXIA ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(8140), unichr(951), $text);
			// GREEK CAPITAL LETTER ETA WITH PROSGEGRAMMENI ---> GREEK SMALL LETTER ETA ("&eta;")
	$text = str_replace(unichr(920), unichr(952), $text);
			// GREEK CAPITAL LETTER THETA ---> GREEK SMALL LETTER THETA ("&theta;")
	$text = str_replace(unichr(7984), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH PSILI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7985), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DASIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7986), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH PSILI AND VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7987), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DASIA AND VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7988), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH PSILI AND OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7989), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DASIA AND OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7990), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7991), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7992), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH PSILI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7993), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH DASIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7994), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH PSILI AND VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7995), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH DASIA AND VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7996), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH PSILI AND OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7997), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH DASIA AND OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7998), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(7999), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(906), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH TONOS ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(912), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(921), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(938), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH DIALYTIKA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(943), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH TONOS ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(970), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DIALYTIKA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8054), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8055), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8144), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH VRACHY ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8145), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH MACRON ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8146), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DIALYTIKA AND VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8147), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DIALYTIKA AND OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8150), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH PERISPOMENI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8151), unichr(953), $text);
			// GREEK SMALL LETTER IOTA WITH DIALYTIKA AND PERISPOMENI ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8152), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH VRACHY ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8153), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH MACRON ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8154), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH VARIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(8155), unichr(953), $text);
			// GREEK CAPITAL LETTER IOTA WITH OXIA ---> GREEK SMALL LETTER IOTA ("&iota;")
	$text = str_replace(unichr(922), unichr(954), $text);
			// GREEK CAPITAL LETTER KAPPA ---> GREEK SMALL LETTER KAPPA ("&kappa;")
	$text = str_replace(unichr(923), unichr(955), $text);
			// GREEK CAPITAL LETTER LAMDA ---> GREEK SMALL LETTER LAMDA ("&lambda;")
	$text = str_replace(unichr(924), unichr(956), $text);
			// GREEK CAPITAL LETTER MU ---> GREEK SMALL LETTER MU ("&mu;")
	$text = str_replace(unichr(925), unichr(957), $text);
			// GREEK CAPITAL LETTER NU ---> GREEK SMALL LETTER NU ("&nu;")
	$text = str_replace(unichr(926), unichr(958), $text);
			// GREEK CAPITAL LETTER XI ---> GREEK SMALL LETTER XI ("&xi;")
	$text = str_replace(unichr(8000), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH PSILI ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8001), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH DASIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8002), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH PSILI AND VARIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8003), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH DASIA AND VARIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8004), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH PSILI AND OXIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8005), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH DASIA AND OXIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8008), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH PSILI ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8009), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH DASIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8010), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH PSILI AND VARIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8011), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH DASIA AND VARIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8012), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH PSILI AND OXIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8013), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH DASIA AND OXIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(908), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH TONOS ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(927), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(972), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH TONOS ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8056), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH VARIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8057), unichr(959), $text);
			// GREEK SMALL LETTER OMICRON WITH OXIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8184), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH VARIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(8185), unichr(959), $text);
			// GREEK CAPITAL LETTER OMICRON WITH OXIA ---> GREEK SMALL LETTER OMICRON ("&omicron;")
	$text = str_replace(unichr(928), unichr(960), $text);
			// GREEK CAPITAL LETTER PI ---> GREEK SMALL LETTER PI ("&pi;")
	$text = str_replace(unichr(929), unichr(961), $text);
			// GREEK CAPITAL LETTER RHO ---> GREEK SMALL LETTER RHO ("&rho;")
	$text = str_replace(unichr(8164), unichr(961), $text);
			// GREEK SMALL LETTER RHO WITH PSILI ---> GREEK SMALL LETTER RHO ("&rho;")
	$text = str_replace(unichr(8165), unichr(961), $text);
			// GREEK SMALL LETTER RHO WITH DASIA ---> GREEK SMALL LETTER RHO ("&rho;")
	$text = str_replace(unichr(8172), unichr(961), $text);
			// GREEK CAPITAL LETTER RHO WITH DASIA ---> GREEK SMALL LETTER RHO ("&rho;")
	$text = str_replace(unichr(931), unichr(963), $text);
			// GREEK CAPITAL LETTER SIGMA ---> GREEK SMALL LETTER SIGMA ("&sigma;")
	$text = str_replace(unichr(962), unichr(963), $text);
			// GREEK SMALL LETTER FINAL SIGMA ---> GREEK SMALL LETTER SIGMA ("&sigma;")
	$text = str_replace(unichr(932), unichr(964), $text);
			// GREEK CAPITAL LETTER TAU ---> GREEK SMALL LETTER TAU ("&tau;")
	$text = str_replace(unichr(8016), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH PSILI ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8017), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DASIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8018), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH PSILI AND VARIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8019), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DASIA AND VARIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8020), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH PSILI AND OXIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8021), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DASIA AND OXIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8022), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8023), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8025), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH DASIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8027), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH DASIA AND VARIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8029), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH DASIA AND OXIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8031), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(910), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH TONOS ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(933), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(939), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH DIALYTIKA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(944), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(971), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DIALYTIKA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(973), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH TONOS ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8058), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH VARIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8059), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH OXIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8160), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH VRACHY ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8161), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH MACRON ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8162), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND VARIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8163), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND OXIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8166), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH PERISPOMENI ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8167), unichr(965), $text);
			// GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND PERISPOMENI ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8168), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH VRACHY ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8169), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH MACRON ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8170), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH VARIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(8171), unichr(965), $text);
			// GREEK CAPITAL LETTER UPSILON WITH OXIA ---> GREEK SMALL LETTER UPSILON ("&upsilon;")
	$text = str_replace(unichr(934), unichr(966), $text);
			// GREEK CAPITAL LETTER PHI ---> GREEK SMALL LETTER PHI ("&phi;")
	$text = str_replace(unichr(935), unichr(967), $text);
			// GREEK CAPITAL LETTER CHI ---> GREEK SMALL LETTER CHI ("&chi;")
	$text = str_replace(unichr(936), unichr(968), $text);
			// GREEK CAPITAL LETTER PSI ---> GREEK SMALL LETTER PSI ("&psi;")
	$text = str_replace(unichr(8032), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8033), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8034), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND VARIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8035), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND VARIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8036), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND OXIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8037), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND OXIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8038), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8039), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8040), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8041), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8042), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND VARIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8043), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND VARIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8044), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND OXIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8045), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND OXIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8046), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND PERISPOMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8047), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND PERISPOMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(911), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH TONOS ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(937), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(974), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH TONOS ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8060), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH VARIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8061), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH OXIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8096), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8097), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8098), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8099), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8100), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8101), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8102), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PSILI AND PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8103), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH DASIA AND PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8104), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8105), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8106), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND VARIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8107), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND VARIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8108), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND OXIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8109), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND OXIA AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8110), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8111), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8178), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH VARIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8179), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8180), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH OXIA AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8182), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PERISPOMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8183), unichr(969), $text);
			// GREEK SMALL LETTER OMEGA WITH PERISPOMENI AND YPOGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8186), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH VARIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8187), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH OXIA ---> GREEK SMALL LETTER OMEGA ("&omega;")
	$text = str_replace(unichr(8188), unichr(969), $text);
			// GREEK CAPITAL LETTER OMEGA WITH PROSGEGRAMMENI ---> GREEK SMALL LETTER OMEGA ("&omega;")

    return $text;

}
Then, in /include/inc_front/content/cnt13.article.inc.php

after:

Code: Select all

			$content["search_word"][$key] = str_replace("\\*", '.*', $content["search_word"][$key]);
we add the following line:

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  			$content["search_word"][$key] = unigrchars_replace($content["search_word"][$key]);
and finally, we replace the following line:

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				preg_match_all('/'.$s_search_words.'/is', $s_text, $s_result ); //search string
with this code:

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				$s_text1 = unigrchars_replace($s_text);

				preg_match_all('/'.$s_search_words.'/is', $s_text1, $s_result ); //search string
Now you can enjoy successful searches in greek utf8 by using any combination of greek characters, regardless whether in the search string you put (or in the searched text exist) accents, capitals, modifiers etc.

The only concern would be performance if the number of articles (i.e. the amount of text in the db) is huge. In any case, this could only be solved by introducing pre-indexed searches (which are not searching the actual stored text in real time, but they are using optimized indexes of text instead), as I have mentioned in my earlier post (referenced at the top of this post). Thus, I have a concern that a possible attacker could deploy continuous searches on a phpwcms site and freeze everything (DoS attacks). Perhaps, a detection system should be incorporated in phpwcms that would pose limitations in the number of searches per time unit that a particular IP can execute.

Nik2004
Posts: 132
Joined: Mon 9. Aug 2004, 14:31
Location: Athens,Greece

Re: Searching in a Greek Multiaccent (Polytonic) site (UTF-8)

Post by Nik2004 » Fri 18. Jan 2008, 23:26

Actually, I think this post is misplaced. It should be moved to "Hacks & Enhancements" or in "phpwcms Support English". Maybe someone with authority can move it.

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