PHP过滤emoji表情

封装函数如下：

/**
 * 过滤emoji表情
 */
public static function filterEmoji($text, $replaceTo = ''){
    $regexEmoticons = '/[\x{1F600}-\x{1F64F}]/u';
    $clean_text = preg_replace($regexEmoticons, $replaceTo, $text);
    $regexSymbols = '/[\x{1F300}-\x{1F5FF}]/u';
    $clean_text = preg_replace($regexSymbols, $replaceTo, $clean_text);
    $regexTransport = '/[\x{1F680}-\x{1F6FF}]/u';
    $clean_text = preg_replace($regexTransport, $replaceTo, $clean_text);
    $regexMisc = '/[\x{2600}-\x{26FF}]/u';
    $clean_text = preg_replace($regexMisc, $replaceTo, $clean_text);
    $regexDingbats = '/[\x{2700}-\x{27BF}]/u';
    $clean_text = preg_replace($regexDingbats, $replaceTo, $clean_text);
    return $clean_text;
}