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array_merge_recursive
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array_merge_recursive

Name

array_merge_recursive — Recursively merges all passed values into one array.

Synopsis

array array_merge_recursive(array_1, value_2[, . . .]); mixed array_1: Base array or value mixed value_2: Next value or array to merge mixed . . . (optional): Further values or arrays to merge

Returns

Array containing the results of merging all passed values; NULL on failure

Description

This function is like array_merge() except that identically-keyed nested arrays are recursed through and merged with each other, just as though array_merge() had been called on them.

Version

PHP 4 since 4.0.1

Example

Example 23. Recursively merge arrays

$ax = array("a" => "alpha", "b" => "bravo", 
            "z" => array("c" => "charlie", "d" => "delta"));
$ay = array("t" => "tango", "u" => "uniform", "v" => "victor", 
            "z" => array("w" => "whiskey", "x" => "x-ray"));
$az = array("lima", "mike", "november",
            "not_z" => array("Bill" => "Cat", "Rosebud" => "basselope"));
print_r(array_merge_recursive($ax, $ay, $az));

Output:
Array
(
    [a] => alpha
    [b] => bravo
    [z] => Array
        (
            [c] => charlie
            [d] => delta
            [w] => whiskey
            [x] => x-ray
        )

    [t] => tango
    [u] => uniform
    [v] => victor
    [0] => lima
    [1] => mike
    [2] => november
    [not_z] => Array
        (
            [Bill] => Cat
            [Rosebud] => basselope
        )

)

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