<?php


function customSearch($example, $searchword){
$ok="";
	foreach($example as $k=>$v) {
    if(preg_match("/\b$searchword\b/i", $v)) {
        $ok ="true";
    } 
}
	if($ok == "true") return true; else return false;
}

$arr = array("selami şahin","naber bakalım","selam sana","r10 nokta net.");



var_dump( customSearch($arr,"r10"));
var_dump( customSearch($arr,"selam"));
var_dump( customSearch($arr,"murtaza"));
?>