3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array( Array('weight' => '317.51474856007','reps' => '10'), Array('weight' => 50,'reps' => 10), Array('reps' => 10), Array('reps' => 10) ); //$count = array(); array_walk_recursive($arr, function($v, $k)use(&$count){if(array_key_exists($k, $count))$count[$k]++;else $count[$k]=1;}); print_r($count);
based on hvSgq
Output for 5.3.0 - 5.6.21, 7.0.0 - 7.1.0
Warning: array_key_exists() expects parameter 2 to be array, null given in /in/bllb1 on line 10 Array ( [weight] => 2 [reps] => 4 )
Output for hhvm-3.10.0 - 3.12.0
Warning: Invalid operand type was used: array_key_exists expects an array or an object; false returned. in /in/bllb1 on line 10 Array ( [weight] => 2 [reps] => 4 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/bllb1 on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/bllb1 on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/bllb1 on line 10
Process exited with code 255.