The array_merge() function merges one or more arrays into one array. It returns an array in which the elements of all arrays passed in parameters are merged.
Note − In case of same keys of two or more array elements, the last one overrides the other.
Syntax
array_merge(arr1, arr2, arr3, …)
Parameters
arr1 − Initial array to merge
arr2 − Another array
arr3 − Another array
Return
The array_merge() function returns an array in which the elements of all arrays passed in parameters are merged.
The following is an example that merges two array with a key repeated in the second array. In this case the last one overrides the other.
Example
<?php
$arr1 = array("p"=>"red","q"=>"green");
$arr2 = array("p"=>"blue","r"=>"yellow");
print_r(array_merge($arr1,$arr2));
?>
Output
Array ( [p] => blue [q] => green [r] => yellow )