Merge two arrays as key value pairs in PHP

See array_combine() on PHP.net.

(from the docs for easy reading)

array_combine — Creates an array by using one array for keys and another for its values

Description

array array_combine ( array $keys , array $values )

Creates an array by using the values from the keys array as keys and the values from the values array as the corresponding values.

Parameters

keys - Array of keys to be used. Illegal values for key will be converted to string.

values - Array of values to be used

Example

<?php
$a = array('green', 'red', 'yellow');
$b = array('avocado', 'apple', 'banana');
$c = array_combine($a, $b);

print_r($c);
?>

The above example will output:

Array
(
    [green]  => avocado
    [red]    => apple
    [yellow] => banana
)

This should do the trick

function array_merge_keys($ray1, $ray2) {
    $keys = array_merge(array_keys($ray1), array_keys($ray2));
    $vals = array_merge($ray1, $ray2);
    return array_combine($keys, $vals);
}