下面的例子是将 gb2312 转换为 uft-8 这种形式
php4.3.1以后的iconv函数很好用的，只是需要自己写一个uft8到unicode的转换函数
查表(gb2312.txt)也行
$text = "电子书库";
preg_match_all("/[-]?./",$text,$ar);
foreach($ar[0] as $v)
echo "".utf8_unicode(iconv("GB2312","UTF-8",$v)).";";
?>
// utf8 -> unicode
function utf8_unicode($c) {
switch(strlen($c)) {
case 1:
return ord($c);
case 2:
$n = (ord($c[0]) & 0x3f) $n += ord($c[1]) & 0x3f;
return $n;
case 3:
$n = (ord($c[0]) & 0x1f) $n += (ord($c[1]) & 0x3f) $n += ord($c[2]) & 0x3f;
return $n;
case 4:
$n = (ord($c[0]) & 0x0f) $n += (ord($c[1]) & 0x3f) $n += (ord($c[2]) & 0x3f) $n += ord($c[3]) & 0x3f;
return $n;
}
}
?>
下面的例子是利用php将uft-8这中编码转换为gb2312.
$str = "TTL全天候自动聚焦";
$str = preg_replace("|([0-9]{1,5});|", "".u2utf82gb(\1)."", $str);
$str = "$str="$str";";
eval($str);
echo $str;
function u2utf82gb($c){
$str="";
if ($c $str.=$c;
} else if ($c $str.=chr(0xC0 | $c>>6);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c $str.=chr(0xE0 | $c>>12);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c $str.=chr(0xF0 | $c>>18);
$str.=chr(0x80 | $c>>12 & 0x3F);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
}
return iconv('UTF-8', 'GB2312', $str);
}
?>
或者是
function unescape($str) {
$str = rawurldecode($str);
preg_match_all("/(?:%u.{4})|.{4};|d+;|.+/U",$str,$r);
$ar = $r[0];
print_r($ar);
foreach($ar as $k=>$v) {
if(substr($v,0,2) == "%u")
$ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,-4)));
elseif(substr($v,0,3) == "")
$ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,3,-1)));
elseif(substr($v,0,2) == "") {
echo substr($v,2,-1)."
";
$ar[$k] = iconv("UCS-2","GB2312",pack("n",substr($v,2,-1)));
}
}
return join("",$ar);
}
$str = "TTL全天候自动聚焦";
echo unescape($str); file://out TTL全天候自动聚焦
利用javascript来转换
<script language="JavaScript1.2"><br>/*<br>This following code are designed and writen by Windy_sk <seasonx@163.net><br>You can use it freely, but u must held all the copyright items!<br>*/<br>function Str2Unicode(str){<br>var arr = new Array();<br>for(var i=0;i<str.length;i++){<br> arr[i]="" + str.charCodeAt(i) + ";";<br>}<br>return(arr.toString().replace(/,/g,""));<br>}<br>function Unicode2oStr(str){<br>var re=/[da-fA-F]{1,5};/ig;<br>var arr=str.match(re);<br>if(arr==null)return("");<br>for(var i=0;i<arr.length;i++){<br> arr[i]=String.fromCharCode(arr[i].replace(/[]/g,""));<br>}<br>return(arr.toString().replace(/,/g,""))<br>}<br>function modi_str(){<br>if(document.all.text.method.checked){<br> if(document.all.text.decode.value!=""){<br> document.all.text.encode.value = Str2Unicode(document.all.text.decode.value);<br> }else{<br> document.all.text.decode.value = Unicode2oStr(document.all.text.encode.value);<br> }<br>}else{<br> if(document.all.text.encode.value!=""){<br> document.all.text.decode.value = Unicode2oStr(document.all.text.encode.value);<br> }else{<br> document.all.text.encode.value = Str2Unicode(document.all.text.decode.value);<br> }<br>}<br>}<br></script>
下面是一个显示所有全角半角的字体的查看例子
立即学习“PHP免费学习笔记（深入）”；
<script><br>function showUni(min,max){<br>show.document.open();<br>show.document.writeln("<style>body{font-size:9pt;word-break:break-all;}");<br>show.document.writeln(min + " - " + max + "<br><br>");<br>var i=0;<br>for(i=min;i<=max;i++){<br> show.document.write("" + i + ";");<br>}<br>show.document.close();<br>}<br></script>
自定义： -
下面是一个查表(gb2312),转换gb2312到utf8的例子, 现在有iconv函数,这个已经没有太大的意义了,
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);
}
}
return $utf8;
}
function u2utf8($c){
$str="";
if ($c $str.=$c;
} else if ($c $str.=chr(0xC0 | $c>>6);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c $str.=chr(0xE0 | $c>>12);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c $str.=chr(0xF0 | $c>>18);
$str.=chr(0x80 | $c>>12 & 0x3F);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
}
return $str;
}
?>
