- var_dump: documentation ( source)
- array_pad: documentation ( source)
- array_walk: documentation ( source)
<?php
$arr = [
[1,2,3],
[1,2]
];
array_walk ( $arr , function(&$item) {
$item = array_pad($item, 3, null);
} );
foreach($arr as [$var1, $var2, $var3]) {
var_dump($var1, $var2, $var3);
}