- var_dump: documentation ( source)
- ini_set: documentation ( source)
- array_walk_recursive: documentation ( source)
<?php ini_set('display_errors', true); ini_set('error_reporting', -1);
$a = [["5","131"],["1","515"],["2","333"],["3","28"],["4","13"]];
var_dump($a, array_walk_recursive($a, 'intval'));