How To Use Sort Multidimensional Array By Date Element Using PHP?

Hi Friends,

This example is how to use sort multidimensional array by date element using php?.

Sorting a multidimensional array by element containing date.

Use the usort() function to sort the array.

The usort() function is PHP builtin function that sorts a given array using user-defined comparison function. This function assigns new integral keys starting from zero to array elements.

So let's start following example.

Example:

<?php
  
    // Declare a multidimensional array
    // and initialize it
    $array = Array (
        Array (
           "gfg" => "GFG_1",
           "datetime" => "2021-02-22 11:29:45",
        ),
        Array (
           "gfg" => "GFG_2",
           "datetime" => "2021-02-13 11:29:45",
        ),
        Array (
           "gfg" => "GFG_3",
           "datetime" => "2021-02-15 11:29:45",
        )
    );
  
    // Comparison function
    function date_compare($element1, $element2) {
        $datetime1 = strtotime($element1['datetime']);
        $datetime2 = strtotime($element2['datetime']);
        return $datetime1 - $datetime2;
    } 
  
    // Sort the array 
    usort($array, 'date_compare');
  
    // Print the array
    print_r($array)
  
?>

Output:

Array
(
    [0] => Array
        (
            [gfg] => GFG_2
            [datetime] => 2021-02-13 11:29:45
        )

    [1] => Array
        (
            [gfg] => GFG_3
            [datetime] => 2021-02-15 11:29:45
        )

    [2] => Array
        (
            [gfg] => GFG_1
            [datetime] => 2021-02-22 11:29:45
        )
)

I hope it can help you...