array_merge in PHP

Syntax of array_merge

array array_merge(array array1, array array2[, … array arrayN])

Returns an array created by appending the elements of every provided array to the previous. If any array has a value with the same string key, the last value encountered for the key is returned in the array; any elements with identical numeric keys are inserted into the resulting array

Example of array_merge

<?php
$array1 = array("color" => "red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);
?>

Array
(
    [color] => green
    [0] => 2
    [1] => 4
    [2] => a
    [3] => b
    [shape] => trapezoid
    [4] => 4
)