Ajax验证用户名中文不能判断，英文可以

首先Ajax传值的时候要使用escape()对中文进行转码。
然后提交给PHP之后再转回来。。

GB2312编码：

function unescape($str) {  $str = rawurldecode($str);  preg_match_all("/%u.{4}|&#x.{4};|&#d+;|.+/U",$str,$r);  $ar = $r[0];  foreach($ar as $k=>$v) {  if(substr($v,0,2) == "%u")  $ar[$k] = iconv("UCS-2","GBK",pack("H4",substr($v,-4)));  elseif(substr($v,0,3) == "&#x")  $ar[$k] = iconv("UCS-2","GBK",pack("H4",substr($v,3,-1)));  elseif(substr($v,0,2) == "&#") {  $ar[$k] = iconv("UCS-2","GBK",pack("n",substr($v,2,-1)));  }  }  return join("",$ar);  }

UTF8编码：

function unescape($str){  $ret = '';  $len = strlen($str);  for ($i = 0; $i < $len; $i++){  if ($str[$i] == '%' && $str[$i+1] == 'u'){  $val = hexdec(substr($str, $i+2, 4));  if ($val < 0x7f) $ret .= chr($val);  else if($val < 0x800) $ret .= chr(0xc0|($val>>6)).chr(0x80|($val&0x3f));  else $ret .= chr(0xe0|($val>>12)).chr(0x80|(($val>>6)&0x3f)).chr(0x80|($val&0x3f));  $i += 5;  }  else if ($str[$i] == '%'){  $ret .= urldecode(substr($str, $i, 3));  $i += 2;  }  else $ret .= $str[$i];  }  return $ret;  }

本文出自 “沉鱼落雁” 博客，请务必保留此出处http://hdjdcyl.blog.51cto.com/3781506/1147772