array_merge -- Merge two or more arrays


array array_merge(array array1, array array2, [ ...] );

array_merge() merges the elements of two or more arrays together so that the values of one are appended to the end of the previous one. It returns the resulting array.

If the input arrays had the same string keys, then the later value for that key will overwrite previous one. If, however, the arrays have the same numeric key, this does not happen since the values are appended.

Example 1. array_merge() example

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

Resulting array will be array("color" => "green", 2, 4, "a", "b", "shape" => "trapezoid").

Note: This function was added in PHP 4.0.