我们在通过PHP获取微信昵称，并且存于数据库的时候，由于一些昵称带有特殊符号，所以存不进去，这时候我们可以通过下面的方式来处理。
方法二
protected function removeEmoji($clean_text) {
// Match Emoticons
$regexEmoticons = '/[\x{1F600}-\x{1F64F}]/u';
$clean_text = preg_replace($regexEmoticons, '', $clean_text);
// Match Miscellaneous Symbols and Pictographs
$regexSymbols = '/[\x{1F300}-\x{1F5FF}]/u';
$clean_text = preg_replace($regexSymbols, '', $clean_text);
// Match Transport And Map Symbols
$regexTransport = '/[\x{1F680}-\x{1F6FF}]/u';
$clean_text = preg_replace($regexTransport, '', $clean_text);
// Match Miscellaneous Symbols
$regexMisc = '/[\x{2600}-\x{26FF}]/u';
$clean_text = preg_replace($regexMisc, '', $clean_text);
// Match Dingbats
$regexDingbats = '/[\x{2700}-\x{27BF}]/u';
$clean_text = preg_replace($regexDingbats, '', $clean_text);
return $clean_text;
}方法二
preg_replace("/[\x{1F600}-\x{1F64F}\x{1F300}-\x{1F5FF}\x{1F680}-\x{1F6FF}\x{2600}-\x{26FF}\x{2700}-\x{27BF}]/u","","这里是昵称")方法三
// 过滤掉emoji表情
function filterEmoji($str){
$str = preg_replace_callback( '/./u',
function (array $match) {
return strlen($match[0]) >= 4 ? '' : $match[0];
},
$str);
return $str;
}