CODEWITHSUNDEEP
phparrayssortingasort
Yasser1984
Yasser1984

Reputation: 2451

PHP sort an array of arrays according to an index in the arrays

Let's say you have an array that looks like this:

$myArray []= array('firstname' => 'John' , 'lastname'=> 'Johnson');

$myArray []= array('firstname' => 'Adam' , 'lastname'=> 'Tyson');

$myArray []= array('firstname' => 'Mike' , 'lastname'=> 'Robinson');

$myArray []= array('firstname' => 'David' , 'lastname'=> 'Jackson');

How can you sort $myArray according to the lastname?

Upvotes: 1

Views: 5377

Answers (3)

Michael J. Calkins
Michael J. Calkins

Reputation: 32655

I got it to work using usort() and a closure.

        usort($myArray, function($a, $b){
            return strcasecmp($a['lastname'], $b['lastname']);
        });

Upvotes: 3

Kris
Kris

Reputation: 179

This also works

<?php
    $myArray []= array('firstname' => 'John' , 'lastname'=> 'Johnson');
    $myArray []= array('firstname' => 'Adam' , 'lastname'=> 'Tyson');
    $myArray []= array('firstname' => 'Mike' , 'lastname'=> 'Robinson');
    $myArray []= array('firstname' => 'David' , 'lastname'=> 'Jackson');

    foreach ($myArray as $array) {
        $lastnames[] = $array['lastname'];
    }

    array_multisort($lastnames,SORT_STRING,$myArray);
    echo '<pre>',print_r($myArray,1),'</pre>';

Upvotes: 6

Edoardo Pirovano
Edoardo Pirovano

Reputation: 8334

This should do what you need:

<?php
function cmp($a, $b) {
    return strcasecmp($a['lastname'], $b['lastname']);
}

$myArray[] = array('firstname' => 'John', 'lastname'=> 'Johnson');
$myArray[] = array('firstname' => 'Adam', 'lastname'=> 'Tyson');
$myArray[] = array('firstname' => 'Mike', 'lastname'=> 'Robinson');
$myArray[] = array('firstname' => 'David', 'lastname'=> 'Jackson');

uasort($myArray, 'cmp');

I'm using uasort(), one of the custom sort function, to the sorting.

Upvotes: 2

Related Questions