To find an alternative function of iconv, how to solve

An alternative function for finding iconv
Online to find the next, no comparison table, ask for a, the best of their own tried, send me mailbox amani1234#21cn.com, thank you

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PHP Code

/*******************************//GB to UTF-8 encoded *******************************/function Gb2utf8 ($GBSTR) {global $ codetable; if (Trim ($gbstr) = = "") return $gbstr; if (empty ($CODETABLE)) {$filename = DirName (__file__). "  /gb2312-utf8.table ";  $fp = fopen ($filename, "R");  while ($l = Fgets ($fp, +)) {$CODETABLE [Hexdec (substr ($l, 0, 6)] = substr ($l, 7, 6);} Fclose ($FP); } $ret = ""; $utf 8 = "";   while ($GBSTR) {if (Ord (substr ($gbstr, 0, 1)) > 127) {$thisW = substr ($gbstr, 0, 2);   $gbstr = substr ($gbstr, 2, strlen ($GBSTR));   $utf 8 = "";   @ $utf 8 = U2utf8 (Hexdec ($CODETABLE [Hexdec (Bin2Hex ($thisW))-0x8080]));   if ($utf 8!= "") {for ($i = 0; $i < strlen ($utf 8); $i + 3) $ret. = Chr (substr ($utf 8, $i, 3));   }} else {$ret. = substr ($gbstr, 0, 1);  $gbstr = substr ($gbstr, 1, strlen ($GBSTR)); }} return $ret;} Unicode goto utf8function U2utf8 ($c) {for ($i = 0; $i < count ($c); $i + +) $str = ""; if ($c < 0x80) {$str. = $c;} else if ($c < 0x800) {$str. = (0xC0 | $c;> 6); $str. = (0x80 | $c & 0x3F);  } else if ($c < 0x10000) {$str. = (0xE0 | $c >> 12);  $str. = (0x80 | $c >> 6 & 0x3F); $str. = (0x80 | $c & 0x3F);  } else if ($c < 0x200000) {$str. = (0xF0 | $c >> 18);  $str. = (0x80 | $c >> & 0x3F);  $str. = (0x80 | $c >> 6 & 0x3F); $str. = (0x80 | $c & 0x3F); } return $str;}
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Landlord look at this post: http://neture.homeip.net/digiland/viewtopic.php?pid=39
Download the address Osc_iconv.zip
There's a chart in there.

If you need to use it, it is recommended to open Iconv in PHP.
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I suggest you don't write it yourself.
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It is strongly recommended to use the built-in, write your own table definitely not all
Iconv can handle a lot of character sets, their own writing must not include all
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