Sort Multidimensional Array by date in PHP

Sort Multidimensional Array by date in PHP

Published Feb 07,2022 by Kailash Singh

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In this post, we are going to teach, how to Sort Multidimensional Array in ascending and descending order by date in PHP.

What is Multidimensional Array?

A Multidimensional Array is an array contains one or more arrays.

1) Sort Multidimensional Array in Ascending Order

<?php
  $data[] = array('id' => 3, 'text' => 'Kailash Singh', 'date' => '2022-02-07 13:04:25');
  $data[] = array('id' => 1, 'text' => 'Amit Singh', 'date' => '2022-02-07 16:04:24');
  $data[] = array('id' => 2, 'text' => 'Elevenstech', 'date' => '2022-02-06 10:04:20');

  usort($data, function($a, $b) {
    return strtotime($a['date']) - strtotime($b['date']);
  });
  echo '<pre>'; print_r($data);
?> 

2) Sort Multidimensional Array in Descending Order

<?php
  $data[] = array('id' => 3, 'text' => 'Kailash Singh', 'date' => '2022-02-07 13:04:25');
  $data[] = array('id' => 1, 'text' => 'Amit Singh', 'date' => '2022-02-07 16:04:24');
  $data[] = array('id' => 2, 'text' => 'Elevenstech', 'date' => '2022-02-06 10:04:20');

  usort($data, function($a, $b) {
    return strtotime($b['date']) - strtotime($a['date']);
  });
  echo '<pre>'; print_r($data);
?> 

What is an usort() function?

It is an array using a user-defined comparision function.