- var_dump: documentation ( source)
- array_splice: documentation ( source)
<?php
$tab = [
'441005' => ['bla' => 1, 'bol' => 2, 'dru' => 3],
'441001' => ['bla' => 9, 'bol' => 5, 'dru' => 4],
'441006' => ['bla' => 7, 'bol' => 3, 'dru' => 1]
];
var_dump(
$tab,
array_splice($tab, 0, 1),
$tab
);