Day 5 part 1

<?php
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$all_strings = explode(' ', $all_strings);
$number_of_allowed_strings = 0;
foreach ($all_strings as $string) {
    if (preg_match_all('/(ab|cd|pq|xy)/', $string)) continue;

    if (!preg_match_all('/(\w)\1/', $string)) continue;

    if (preg_match_all('/[aeiou]/', $string) < 3) continue;

    $number_of_allowed_strings++;
}
echo $number_of_allowed_strings;
?>

Spoiler alert

Number of strings: 589
Number of nice strings: 160 (wrong answer?)