用个函数过滤掉特殊字符
/**
* $str 微信昵称
**/
public function filter($str) {
if($str){
$name = $str;
$name = preg_replace('/\xEE[\x80-\xBF][\x80-\xBF]|\xEF[\x81-\x83][\x80-\xBF]/', '', $name);
$name = preg_replace('/xE0[x80-x9F][x80-xBF]‘.‘|xED[xA0-xBF][x80-xBF]/S','?', $name);
$return = json_decode(preg_replace("#(\\\ud[0-9a-f]{3})#ie","",json_encode($name)));
if(!$return){
return $this->jsonName($return);
}
}else{
$return = '';
}
return $return;
}
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