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$a = 'aadfdsf¶á¶¥ÌæÒ»¿Ý»ù22245¶¥ÌæsdffhѹÏÂ';
/**
* ½ØÈ¡utf-8×Ö·û
* @param string $string
* @param int$length
*
* return string
*/
function cutstr($string, $length) {
preg_match_all("/./u", $string, $info);
$i = 0;
$str = '';
foreach($info[0] as $item){
if(strlen($item) == 3){
$i+=2;
}else{
$i++;
}
$str .= $item;
if($i>=$length)break;
}
return $str;
}
echo cutstr($a, 10); //-> aadfdsf¶á¶¥ 


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#tar -zxvf libmcrypt-2.5.8.tar.gz
#cd libmcrypt-2.5.8
#./configure
#make
#make install
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#cd mhash-0.9.9.9
#./ ......

PHP bug??global·¢ÏÖµÄÎÊÌâ

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<?php
$type='a';
$target='type';
$a=array(1,2,3);
a($target);
function a($type)
{
    global $$type;
    var_dump($$type);
}
?>
Ô¤¼ÆÊä³öµÄÊÇstring(1)”a”
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Notice: Undefined variable: a in D:\web\global.php on ......

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