- var_dump: documentation ( source)
- stripos: documentation ( source)
- mb_stripos: documentation ( source)
<?php
$product = ['name' => 'THIS IS À MULTIBYTE STRING'];
$search = 'à';
echo 'with stripos: '; var_dump(stripos($product['name'], $search));
echo 'with mb_stripos: '; var_dump(mb_stripos($product['name'], $search));