3v4l.org

run code in 300+ PHP versions simultaneously
<?php $aTest = array('apple', 'pineapple', 'banana', 'kiwi', 'pear', 'strawberry', '1234', '#qwerty', '!qwerty'); $range = range('A','Z'); $range[] = "#"; $output = array(); foreach($aTest AS $fruit){ $uc = ucfirst($fruit); if(array_search($uc[0], $range) === FALSE){ $output['#'][] = $uc; } else { $output[$uc[0]][] = $uc; } } print_r($output);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [A] => Array ( [0] => Apple ) [P] => Array ( [0] => Pineapple [1] => Pear ) [B] => Array ( [0] => Banana ) [K] => Array ( [0] => Kiwi ) [S] => Array ( [0] => Strawberry ) [#] => Array ( [0] => 1234 [1] => #qwerty [2] => !qwerty ) )

preferences:
259.29 ms | 406 KiB | 372 Q