PHP array_replace() function

The array_replace() function is a built-in function in PHP. The PHP array_replace( ) function is used to replace the values of the first array with the values from following arrays. 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( ) function return the replaced array. It will return null if an error occurs.

Example 1

<?php
$city1=array("a"=>"Patna","b"=>"chennai");
$city2=array("a"=>"Pataliputra","Noida");
print_r(array_replace($city1,$city2));
?>

Output:

Array
(
    [a] =>Pataliputra
    [b] =>chennai
    [0] => Noida
)

Example 2

<?php
$a1=array("a"=>"Sonoo","java");
$a2=array("a"=>"javatpoint","b"=>"PHP");
print_r(array_replace($a1,$a2));
?>

Output:

Array
(
    [a] =>javatpoint
    [0] => java
    [b] => PHP
)

Example 3

<?php
$player1 = array("sachin", "sehwag", "kapil", "rahul");
$player2 = array(0 => "rohit", 4 => "klrahul");
$player3 = array(0 => "arjun");
$res = array_replace($player1, $player2, $player3);
print_r($res);
?>

Output:

Array
(
    [0] =>arjun
    [1] =>sehwag
    [2] =>kapil
    [3] =>rahul
    [4] =>klrahul
)

Example 4

<?php
$a1=array("j"=>"java","p"=>"php");
$a2=array("j"=>"javatpoint");
print_r(array_replace($a1,$a2));
?>

Output:

Array
(
    [j] =>javatpoint
    [p] =>php
)

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