(PHP 5, PHP 7)
array_combine — Creates an array by using one array for keys and another for its values
$keys
   , array $values
   ) : array
   Creates an array by using the values from the
   keys array as keys and the values from the
   values array as the corresponding values.
  
   Returns the combined array, FALSE if the number of elements
   for each array isn't equal.
  
   Throws E_WARNING if the number of elements in
   keys and values does not
   match.
  
| Version | Description | 
|---|---|
| 5.4.0 | Previous versions issued E_WARNINGand returnedFALSEfor empty arrays. | 
Example #1 A simple array_combine() 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
)