3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = Array ('a','b','a','a','a','c','c','b','b','a','a','a','a'); $result = []; $count = 0; $current = $array[0]; for ($i = 0; $i < count($array); $i++) { if ($array[$i] == $current) { $count++; } else { $result[] = array($current, $count); $count = 1; } $current = $array[$i]; } $result[] = array($current, $count); print_r($result);
Output for 7.1.25 - 7.1.33, 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 - 8.3.4, 8.3.6
Array ( [0] => Array ( [0] => a [1] => 1 ) [1] => Array ( [0] => b [1] => 1 ) [2] => Array ( [0] => a [1] => 3 ) [3] => Array ( [0] => c [1] => 2 ) [4] => Array ( [0] => b [1] => 2 ) [5] => Array ( [0] => a [1] => 4 ) )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => Array ( [0] => a [1] => 1 ) [1] => Array ( [0] => b [1] => 1 ) [2] => Array ( [0] => a [1] => 3 ) [3] => Array ( [0] => c [1] => 2 ) [4] => Array ( [0] => b [1] => 2 ) [5] => Array ( [0] => a [1] => 4 ) )

preferences:
140.44 ms | 402 KiB | 181 Q