array_combine in PHP

PHP array_combine() function it returns a new array by merging two other arrays, where the first array forms the keys, and the other array forms values for a new array.

Syntax: array_combine(array1,array2)

Parameters Description:
array1 : Required. An array, specifying the keys
array2 : Required. An array specifying the values
Note : Both parameters must have equal number of elements.

Example:

<?php 
$keyarr = array("a","b","c","d");
$daysarr = array( "Sunday","Monday","Tuesday","Wednesday");
print_r( array_combine($keyarr,$daysarr) );
?>

Output:

Array ( 
            [a] => Sunday
            [b] => Monday 
            [c] => Tuesday
            [d] => Wednesday
          )