- var_dump: documentation ( source)
- array_combine: documentation ( source)
- array_filter: documentation ( source)
<?php
$a = array(array('d'), '234', '345', '345');
$b = array('asd'=>array('d'), '234', '345', '346');
var_dump(array_combine($a, $b));
$values = array(array('d'));
var_dump(array_filter((array) $values));