<?php
$query = 'SELECT * FROM `tabela`';
$field = 'tresc';
$search = 'jakiś tekst do wyszukania';
foreach($arr as $a)
{
$likes[] = "`$field` LIKE '%$a%'";
}
{
$query .= ' WHERE ';
}
echo $query;
PD9waHAKCiRxdWVyeSA9ICdTRUxFQ1QgKiBGUk9NIGB0YWJlbGFgJzsKJGZpZWxkID0gJ3RyZXNjJzsKJGxpa2VzID0gYXJyYXkoKTsKCiRzZWFyY2ggPSAnamFracWbIHRla3N0IGRvIHd5c3p1a2FuaWEnOwoKJGFyciA9IGV4cGxvZGUoJyAnLCAkc2VhcmNoKTsKJGFyciA9IGFycmF5X2ZpbHRlcigkYXJyKTsKCmZvcmVhY2goJGFyciBhcyAkYSkKewoJJGxpa2VzW10gPSAiYCRmaWVsZGAgTElLRSAnJSRhJSciOwp9CgppZihjb3VudCgkbGlrZXMpID4gMCkKewoJJHF1ZXJ5IC49ICcgV0hFUkUgJzsKCSRxdWVyeSAuPSBpbXBsb2RlKCcgT1IgJywgJGxpa2VzKTsKfQoKZWNobyAkcXVlcnk7