Online PHP editor | output for 2CZ2N

<?php function testAsc($array) { $memory=null; foreach($array as $member) { if ($memory)if($member<=$memory)return false; $memory=$member; } return true; } function solution($array) { for($i=0;$i<count($array);$i++) { $currentArray=array_filter($array, function($index) use($i) { return $i != $index; }, ARRAY_FILTER_USE_KEY); if(testAsc($currentArray)) return implode($currentArray) . "\n"; } return 'nie da sie' . "\n"; } echo solution([1, 2, 3, 4]);//234 echo solution([1, 7, 7, 4]);//nie da sie echo solution([1, 7, 2, 4]);//124