图象函数中的中文显示
2024年02月25日
在www.phpx.com上读到一段代码,是把GB码转换到UTF8,php中TTF支持UTF8编码的非ASCII字符输出.在分析这段代码之后,发现可以实现中文与ASCII混合输出图象,这样在我们操作图象函数时可以更方便.代码如下:
<?
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)-2);
$utf8.=u2utf8(hexdec($codetable[hexdec(bin2hex($this))-0x8080]));
}
else
{
$this=substr($gb,0,1);
$gb=substr($gb,1,strlen($gb)-1);
$utf8.=u2utf8($this);
}
}
/*$ret="";
for($i=0;$i<strlen($utf8);$i+=3)
$ret.=chr(substr($utf8,$i,3));
return$ret;*/
return$utf8;
}
function u2utf8($c)
{
/*for($i=0;$i<count($c);$i++)*/
$str="";
if($c<0x80){
$str.=$c;
}
else if($c<0x800){
$str.=chr(0xC0|$c>>6);
$str.=chr(0x80|$c&0x3F);
}
else if($c<0x10000){
$str.=chr(0xE0|$c>>12);
$str.=chr(0x80|$c>>6&0x3F);
$str.=chr(0x80|$c&0x3F);
}
else if($c<0x200000){
$str.=chr(0xF0|$c>>18);
$str.=chr(0x80|$c>>12&0x3F);
$str.=chr(0x80|$c>>6&0x3F);
$str.=chr(0x80|$c&0x3F);
}
return$str;
}
?>
--------------------------------------------
<?
Header("Content-type:image/jpeg");
$im=imagecreate(800,400);
$black=ImageColorAllocate($im,0,0,0);
$white=ImageColorAllocate($im,255,255,255);
include("gb2utf8.php");
$str=gb2utf8("aaa中过32434");
ImageTTFText($im,90,10,110,300,$white,"/usr/share/fonts/default/TrueType/simsun.ttc",
$str);
ImageJPEG($im);
ImageDestroy($im);
?>
GB2312.txt文件请到www.phpx.com上找.
