How to reset an array keys in php

In this post we will discuss to reset an array after add or delete an index.

If there are an array $a

$a = array(
  0 => 3,
  1 => 5,
  2 => 7,
  3 => 9,
  4 => 0
);

Now we updates this array and delete index 2, so the new array is -

unset($a[2]);

$a = array(
  0 => 3,
  1 => 5,
  3 => 9,
  4 => 0
);

Index 2 has been removed from array and we have to re-arrange all indexes of array.
So its not a big task. Just a simple step and array will arrange form index 0 to 3.
Use the predefined array function array_values and the array indexes will be reset.

$a = array_values($a);

$a = array(
  0 => 3,
  1 => 5,
  2 => 9,
  3 => 0
);

This was a simple array. If we have a multi-dimensional array, Then !!.
Nothing to worry about multi-dimensional, PHP have all tricky solutions :)

$reset_array = array_map('array_values', $arr);

To reset multidimensional array use array_map.
Here $arr is a multidimensional array with different indexes and $rest_array is output after reset all indexes.

Hope this will help you.