http://linux.sheup.com/linux/linux4646.htm

GB2312->UTF-8 转换函数

以下是一段gb2312 -> UTF-8 的函数，西西，我抄了

unicode -> UTF-8 的算法，所以实际比GB2312->unicode

没多多少东西,请大家注意调用gb2utf8()时不能中英文混用

程序需要的GB2312.txt文件

gb2utf8.php

//Program writen by sadly www.phpx.com

function gb2utf8($gb)

{

if(!trim($gb))

return $gb;

$filename="gb2312.txt";

$tmp=file($filename);

$codetable=array();

while(list($key,$value)=each($tmp))

$codetable[hexdec(substr($value,0,6))]=substr($value,7,6);

$utf8="";

while($gb)

{

if (ord(substr($gb,0,1))>127)

{

$this=substr($gb,0,2);

$gb=substr($gb,2,strlen($gb));

$utf8.=u2utf8(hexdec($codetable[hexdec(bin2hex($this))-0x8080]));

}

else

{

$gb=substr($gb,1,strlen($gb));

$utf8.=u2utf8(substr($gb,0,1));

}

}

$ret="";

for($i=0;$i $ret.=chr(substr($utf8,$i,3));

return $ret;

}

function u2utf8($c)

{

for($i=0;$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>>12 & 0x3F);

$str.=(0x80 | $c>>6 & 0x3F);

$str.=(0x80 | $c & 0x3F);

}

return $str;

}

?>

调用举例:通过GD输出 "中国" 两个汉字

example.php

//Header("Content-type: image/gif");

$im = imagecreate(400,300);

$bkg = ImageColorAllocate($im, 0,0,0);

$clr = ImageColorAllocate($im, 255,255,255);

$fnt = "d:/winnt/fonts/simhei.ttf";

include("gb2utf8.php");

$str = gb2utf8("中国");

ImageTTFText($im, 20, 0, 10, 20, $clr, $fnt, $str);

ImageGif($im);

ImageDestroy($im);

?>