Convert GB encoding to UTF8 using PHP

The gb2utf8. php file is as follows:
Copy codeThe Code is as follows:
<? Php
Class GB2UTF8
{
Var $ gb; // The GB2312 string to be converted
Var $ utf8; // The converted UTF8 string
Var $ CodeTable; // array of GB2312 code files used during conversion
Var $ ErrorMsg; // error message during conversion

Function GB2UTF8 ($ InStr = "")
{
$ This-> gb = $ InStr;
$ This-> SetGb2312 ();
($ This-> gb = "")? 0: $ this-> Convert ();
}

Function SetGb2312 ($ InStr = "gb2312.txt ")
{// Set the gb2312code file to gb2312.txt
$ This-> ErrorMsg = "";
$ Tmp = @ file ($ InStr );
If (! $ Tmp ){
$ This-> ErrorMsg = "No GB2312 ";
Return false;
}
$ This-> CodeTable = array ();
While (list ($ key, $ value) = each ($ tmp )){
$ This-> CodeTable [hexdec (substr ($ value, 0, 6)] = substr ($ value, 7, 6 );
}
}

Function Convert ()
{// Convert the GB2312 string to the UTF8 string. You must set $ gb in advance.
$ This-> utf8 = "";
If (! Trim ($ this-> gb) | $ this-> ErrorMsg! = ""){
Return ($ this-> utf8 = $ this-> ErrorMsg );
}
$ Str = $ this-> gb;

While ($ str ){
If (ord (substr ($ str, 127)>)
{
$ Tmp = substr ($ str, 0, 2 );
$ Str = substr ($ str, 2, strlen ($ str ));
$ Tmp = $ this-> U2UTF8 (hexdec ($ this-> CodeTable [hexdec (bin2hex ($ tmp)-0x8080]);
For ($ I = 0; $ I <strlen ($ tmp); $ I + = 3)
$ This-> utf8. = chr (substr ($ tmp, $ I, 3 ));
}
Else
{
$ Tmp = substr ($ str, 0, 1 );
$ Str = substr ($ str, 1, strlen ($ str ));
$ This-> utf8. = $ tmp;
}
}
Return $ this-> utf8;
}

Function U2UTF8 ($ InStr)
{
For ($ I = 0; $ I <count ($ InStr); $ I ++)
$ Str = "";
If ($ InStr <0x80 ){
$ Str. = ord ($ InStr );
}
Else if ($ InStr <0x800 ){
$ Str. = (0xC0 | $ InStr> 6 );
$ Str. = (0x80 | $ InStr & 0x3F );
}
Else if ($ InStr <0x10000 ){
$ Str. = (0xE0 | $ InStr> 12 );
$ Str. = (0x80 | $ InStr> 6 & 0x3F );
$ Str. = (0x80 | $ InStr & 0x3F );
}
Else if ($ InStr <0x200000 ){
$ Str. = (0xF0 | $ InStr> 18 );
$ Str. = (0x80 | $ InStr> 12 & 0x3F );
$ Str. = (0x80 | $ InStr> 6 & 0x3F );
$ Str. = (0x80 | $ InStr & 0x3F );
}
Return $ str;
}
}
?>

The test file is as follows:
Copy codeThe Code is as follows:
<? Php
Header ("Content-type: image/png ");
$ Im = imagecreate (400,300 );
$ Black = ImageColorAllocate ($ im, 0, 0 );
$ White = ImageColorAllocate ($ im, 184,44, 6 );
Include ("gb2utf8. php ");
$ Obj = new gb2utf8 ();
$ Obj-> gb = "123abc China 456def test is correct ";
$ Obj-> Convert ();
ImageTTFText ($ im, 20, 0, 5, 50, $ white, "SIMKAI. TTF", $ obj-> utf8 );
ImagePNG ($ im );
ImageDestroy ($ im );
?>


Note:
To correctly set the font file, make sure that you can use font directly (without gb2utf8) to output English letters.