function isMatchEmoji($str)
{
$pattern='/./u';
$rs=preg_match_all($pattern,$str,$match);
if($rs>0){
foreach($match[0] as $m){
if(strlen($m) >= 4){
return true;
}
}
}
return false;
}
$str='ko👑🎤哈罗';
$rs=isMatchEmoji($str);
echo $rs?'have emoji':'not have emoji';
