GB2312-UTF-8 conversion function_PHP tutorial

What does this function do? Oh, after converting Chinese characters to UTF-8, you can use them in GD!


//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 $str.=$c;
}
else if ($c
$str.=(0xC0 | $c>>6);
$ str.=(0x80 | $c & 0x3F);
}
else if ($c $str.=(0xE0 | $c>>12);
$str .=(0x80 | $c>>6 & 0x3F);
$str.=(0x80 | $c & 0x3F);
}
else if ($c $ str.=(0xF0 | $c>>18);
$str.=(0x80 | $c>>12 & 0x3F);
$str.=(0x80 | $c>>6 & 0x3F) ;
$str.=(0x80 | $c & 0x3F);
}
return $str;
}

Header("Content-type: image/gif") ;
$im = imagecreate(400,300);
$bkg = ImageColorAllocate($im, 0,0,0);
$clr = ImageColorAllocate($im, 255,255,255);
$fnt = "wb.ttf";
//include("gb2utf8.php");
$str = gb2utf8("China");
ImageTTFText($im, 20, 0, 10, 20, $ clr, $fnt, $str);
ImageGif($im);
ImageDestroy($im);
?>

http://www.bkjia.com/PHPjc/532256.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/532256.htmlTechArticleWhat is this function for? Oh, after converting Chinese characters to UTF-8, you can use them in GD! //Program writen by sadly www.phpx.com function gb2utf8($gb) { if(!trim($gb)) return $gb...