3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $sequences = ["6", "66", "67", "68", "69", "697", "698", "699"]; $data = ["69212345", "6209876544", "697986546"]; function get_longest_subsequence_element(array $sequences, $str){ $longestSequence = ""; for($strPosition = 0, $strPositionEnd = strlen($str) - 1; $strPosition < $strPositionEnd; $strPosition++){ for($strLength = 1, $strLengthEnd = strlen($str) - $strPosition; $strLength < $strLengthEnd; $strLength++){ if(in_array($sequence = substr($str, $strPosition, $strLength), $sequences) && $strLength > strlen($longestSequence)) $longestSequence = $sequence; } } return $longestSequence; } foreach($data as $str) echo get_longest_subsequence_element($sequences, $str) . "<br>"; ?>
based on ACvJa
Output for 5.5.0 - 7.3.1
69<br>6<br>697<br>