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Today, we will learn how to reindex array key from 0 after unset key. we can reassign key using array_values function of php. i will give you simple example for reindex array from 0 after unset key using array_values function. we will reassign keys from numeric like 0 1 2 etc.

Sometime you need to store json to database column at that time it is better if you keep array key as numeric with 0 1 2 etc. so you can easily do json encode and json decode. so you can see in this example how you can make it done for reassign array keys in php.

Example:

<?php
   
    $myArray = [
        '0' => [
                'name' => 'Paresh', 
                'email' => 'paresh@gmail.com',
                'birthdate' => '01/01/1990',
            ], 
        '1' => [
                'name' => 'Rakesh', 
                'email' => 'rakesh@gmail.com',
                'birthdate' => '01/01/1990',
            ], 
        '2' => [
                'name' => 'Mahesh', 
                'email' => 'mahesh@gmail.com',
                'birthdate' => '01/01/1990',
            ],
        '3' => [
                'name' => 'Mahesh 2', 
                'email' => 'mahesh@gmail.com',
                'birthdate' => '01/01/1990',
            ]
    ];
   
    unset($myArray[2]);
   
    $myArray = array_values($myArray);
    
    print_r($myArray);
?>

Output:

Array
(
    [0] => Array
        (
            [name] => Paresh
            [email] => paresh@gmail.com
            [birthdate] => 01/01/1990
        )
    [1] => Array
        (
            [name] => Rakesh
            [email] => rakesh@gmail.com
            [birthdate] => 01/01/1990
        )
    [2] => Array
        (
            [name] => Mahesh 2
            [email] => mahesh@gmail.com
            [birthdate] => 01/01/1990
        )
)

I hope it can help you...