- var_dump: documentation ( source)
- array_walk: documentation ( source)
<?php
$array = [
['a' => 1, 'b' => 2],
['a' => 2, 'b' => 2]
];
$data = ['count'=>0,'a'=>0,'b'=>0];
$cb = function($value, $key) {
var_dump($value);
};
array_walk($array, $cb, $data);