3v4l.org

run code in 300+ PHP versions simultaneously
<?php $allowed = ['Visa', 'Mastercard']; /** Make allowed all lowercase **/ $allowedLower = array_map(function($type) { return strtolower($type); }, $allowed); $cardsGiven = 'Visa,Mastercard,Mint'; $cardsAccepted = []; $data = explode(',', $cardsGiven); foreach ($data as $type) { if (in_array(strtolower($type), $allowedLower)) { $cardsAccepted[] = $type; } } print_r($cardsAccepted);

preferences:
45.65 ms | 1483 KiB | 5 Q