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PHP array_replace_recursive() Function

PHP array_replace_recursive() function is used to replace the values of the first array with the values from following arrays recursively.
It accepts a list of arrays as input parameters where the first parameter is compulsory and the rest are optional. It returns the new modified array or NULL if an error occurs.

Syntax:

array_replace_recursive($array1, $array2, $array3...);

Parameter Values

Parameter	Description
array1	This is a required parameter. This parameter defines an array.
array2	This is an optional parameter. This parameter defines an array which will replace the values of array1.
array3,...	This is an optional parameter. This parameter defines more arrays to replace the values of array1 and array2.

Here is an example of array_replace_recursive() function in PHP:

<html>
<body>
<pre>
<?php
$a=array("a","b","c","d","e","f","g");
$x=array("u","v","w","x","y","z");
print_r(array_replace_recursive($a,$x));
?>
</pre>
</body>
</html>

Output:

Array
(
    [0] => u
    [1] => v
    [2] => w
    [3] => x
    [4] => y
    [5] => z
    [6] => g
)

Example 2:

<html>
<body>
<pre>
<?php
$x=array("a"=>array("Abhi"),"b"=>array("Java","Python"),);
$y=array("a"=>array("Jerry"),"b"=>array("PHP"));
$z=array("b"=>array("JavaScript"));
print_r(array_replace_recursive($x,$y));
echo "<br>";
print_r(array_replace_recursive($y,$x,$z));
?>
</pre>
</body>
</html>

Output:

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

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

)

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

    [b] => Array
        (
            [0] => Javascript
            [1] => Python
        )

)

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