Unicode encoding conversion uses PHP to convert GB encoding to UTF8

The gb2utf8.php file is as follows:

Copy the code The code is as follows:

Class GB2UTF8
{
var $gb; // GB2312 string to be converted
var $utf8; // Conversion The resulting UTF8 string
var $CodeTable; // Array of GB2312 code files used during the conversion process
var $ErrorMsg; // Error message during the conversion process
function GB2UTF8($InStr="")
{
$this ->gb=$InStr;
$this->SetGb2312();
($this->gb=="")?0:$this->Convert();
}
function SetGb2312($ InStr="gb2312.txt")
{ // Set gb2312 code file, the default is 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 GB2312 characters To string to a UTF8 string, $gb needs to be set in advance
$this->utf8="";
if(!trim($this->gb) || $this->ErrorMsg!="") {
return ($this->utf8=$this->ErrorMsg);
}
$str=$this->gb;
while($str) {
if (ord(substr($str,0,1 ))>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$this- >utf8.=chr(substr($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$str="";
if ($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 the code The code is as follows:

Header("Content-type: image/png");
$im = imagecreate(400,300);
$black = ImageColorAllocate($im, 0,0, 0);
$white = ImageColorAllocate($im, 184,44,6);
include("gb2utf8.php");
$obj=new gb2utf8();
$obj->gb="123abc中国456def The test is correct";
$obj->Convert();
ImageTTFText($im, 20, 0, 5, 50, $white, "SIMKAI.TTF", $obj->utf8);
ImagePNG($im );
ImageDestroy($im);
?>

Note:
You need to set the font file correctly. Please first confirm that you can use font to output English directly (without using gb2utf8).​

The above introduces the unicode encoding conversion using PHP to convert GB encoding to UTF8, including the content of unicode encoding conversion. I hope it will be helpful to friends who are interested in PHP tutorials.