function yz_expression(){		foreach ($_POST as $key => &$value) {		$value = preg_replace_callback('/[\xf0-\xf7].{3}/', function($r) { return '@E' . base64_encode($r[0]);},$value);			$countt=substr_count($value,"@");			for ($i=0; $i < $countt; $i++) {				$c = stripos($value,"@");				$value=substr($value,0,$c).substr($value,$c+10,strlen($value)-1);			}			$value = preg_replace_callback('/@E(.{6}==)/', function($r) {return base64_decode($r[1]);}, $value);		}		return $_POST;}

 

/**     * 替换掉数组中的emoji表情     * @param $arrayString     * @param string $replaceTo     * @return mixed|string     */    public static function filterEmojiDeep($arrayString,$replaceTo = '?')    {        if(is_string($arrayString))        {            return self::filterEmoji($arrayString,$replaceTo);        }        else if(is_array($arrayString))        {            foreach($arrayString as &$array)            {                if(is_array($array) || is_string($array))                {                    $array = self::filterEmojiDeep($array,$replaceTo);                }                else                {                    $array = $array;                }            }        }        return $arrayString;    }/**     * 替换掉emoji表情     * @param $text     * @param string $replaceTo     * @return mixed|string     */    public static function filterEmoji($text, $replaceTo = '?')    {        $clean_text = "";        // Match Emoticons        $regexEmoticons = '/[\x{1F600}-\x{1F64F}]/u';        $clean_text = preg_replace($regexEmoticons, $replaceTo, $text);        // Match Miscellaneous Symbols and Pictographs        $regexSymbols = '/[\x{1F300}-\x{1F5FF}]/u';        $clean_text = preg_replace($regexSymbols, $replaceTo, $clean_text);        // Match Transport And Map Symbols        $regexTransport = '/[\x{1F680}-\x{1F6FF}]/u';        $clean_text = preg_replace($regexTransport, $replaceTo, $clean_text);        // Match Miscellaneous Symbols        $regexMisc = '/[\x{2600}-\x{26FF}]/u';        $clean_text = preg_replace($regexMisc, $replaceTo, $clean_text);        // Match Dingbats        $regexDingbats = '/[\x{2700}-\x{27BF}]/u';        $clean_text = preg_replace($regexDingbats, $replaceTo, $clean_text);        return $clean_text;    }