Check if exist bad words blacklist in string

function.php

#REF.: https://stackoverflow.com/questions/6284553/using-an-array-as-needles-in-strpos
function striposarray($haystack, $needles=array(), $offset=0) {
    $chr = array();
    foreach($needles as $needle) {
            $res = stripos($haystack, $needle, $offset);
            if ($res !== false) $chr[$needle] = $res;
    }
    if(empty($chr)) return false;
    return min($chr);
}

// Blacklist Words
$blacklist = array(
	'dating',
	'sex',
	'girls',
	'crуptо',
	'passivе inсоmе',
	'contact us',
	'legally',
	'visitors',
	'traffic',
	'commercial offers',
	'cheap',
	'boost',
	'bitcоin',
	'engagement',		
);

$banned = striposa($message, $blacklist);
if($banned !== false){
  exit("Bad Word Found");	
}