- var_dump: documentation ( source)
- array_combine: documentation ( source)
- array_shift: documentation ( source)
- array_keys: documentation ( source)
- array_pop: documentation ( source)
<?php
$array = [0=>'a',8=>'b',2=>'c',7=>'d',9=>'e',11=>'f'];
$test = ArrayObject ($array);
var_dump($test);die;
$array_keys = array_keys($array);
array_shift($array);
array_pop($array_keys);
$array = array_combine ( $array_keys, $array);
var_dump($array);