PHP array_replace_recursive( ) function

The array_replace_recursive() function is an inbuilt function of PHP. The array_replace_recursive( ) function is used to replace the values from passed arrays into the first array recursively. This function was introduced in PHP 5.3.0.

Syntax

Parameter

Parameter	Description	Is compulsory
array1	Specifies an array.	compulsory
array2	Specifies an array which will replace the values of array1.	Optional
array3,...	Specifies more arrays to replace the values of array1 and array2, etc. values from later arrays will overwrite the previous ones.	Optional

Return type

The array_replace_recursive( ) function returns the replaced array. It will return null if an error occurs.

Example 1

<?php
$array1 = array("a"=>array("apple"), "b"=>array("ball"));
$array2 = array("a"=>array("all"), "b"=>array("black"));
print_r(array_replace_recursive($array1, $array2));
?>

Output:

Array
(
    [a] => Array
        (
            [0] => all
        )
[b] => Array
        (
            [0] => black
        )
)

Example 2

<?php
$color1 = array( "a" => array("blue"), "b" => array("green", "red"));
$color2=array( "a" => array("yellow"), "b" => array("black"));
$color3=array("a" => array("saffron"), "b" => array("pink"));
print_r(array_replace_recursive($color1, $color2, $color3));
?>

Output:

Array
(
    [a] => Array
        (
            [0] => saffron
        )

    [b] => Array
        (
            [0] => pink
            [1] => red
        )

)

Example 3

<?php
$player1 = array("a"=>array("sachin"),"b"=>array("ganguly","sehwag"),);
$player2= array("a"=>array("yuvraj"),"b"=>array("ishant"));
print_r(array_replace_recursive($player1, $player2));
?> 

Output:

Array
(
    [a] => Array
        (
            [0] => yuvraj
        )
[b] => Array
        (
            [0] => ishant
            [1] => sehwag
        )
)

Example 4

<?php
$lang1=array("a"=>array("C"),"b"=>array("Java","PHP"),);
$lang2=array("a"=>array("Perl"),"b"=>array("HTML"));
print_r(array_replace_recursive($lang1,$lang2));
?>

Output:

Array
(
    [a] => Array
        (
            [0] => Perl
        )

    [b] => Array
        (
            [0] => HTML
            [1] => PHP
        )

)

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