图象函数中的中文显示

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); ?>