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@ 2019-06-10T11:50:23Z

<?php

$disp_user_arr  = Array
(
    Array
        (
            'u_id' => 59,
            'u_name' => 'Cirine E.',
            'r_nb_today' => 2
        ),
	
	Array
        (
            'u_id' => 9,
            'u_name' => 'Souhaila S.',
            'r_nb_today' => 7
        ),
	
    Array
        (
            'u_id' => 8,
            'u_name' => 'Jihen B. R.',
            'r_nb_today' => 1
        ),
	Array
        (
            'u_id' => 12,
            'u_name' => 'Bassem D.',
            'r_nb_today' => 0
        ),
	Array
        (
            'u_id' => 64,
            'u_name' => 'Cyrine B.',
            'r_nb_today' => 1
        ),
	Array
        (
            'u_id' => 18,
            'u_name' => 'Otail J.',
            'r_nb_today' => 0
        ),
	Array
        (
            'u_id' => 15,
            'u_name' => 'Rim H.',
            'r_nb_today' => 0
        ),
	Array
        (
            'u_id' => 74,
            'u_name' => 'Ghada J.',
            'r_nb_today' => 0
        ),
	Array
        (
            'u_id' => 62,
            'u_name' => 'Alaeddine M.',
            'r_nb_today' => 0
        ),

    Array
        (
            'u_id' => 79,
            'u_name' => 'Khaled B.',
            'r_nb_today' => 0
        ),
	Array
        (
            'u_id' => 71,
            'u_name' => 'Desiree Y.',
            'r_nb_today' => 0
        ),
	Array
        (
            'u_id' => 75,
            'u_name' => 'Mariem N.',
            'r_nb_today' => 0
        ),

    Array
        (
            'u_id' => 66,
            'u_name' => 'Khaoula K.',
            'r_nb_today' => 0
        )
);

function sortByNbToday($a, $b) {
    if ($a['r_nb_today'] == $b['r_nb_today']){
        return strcmp($a["u_name"], $b["u_name"]);
    }
    return ($a['r_nb_today'] > $b['r_nb_today']) ? -1 : 1;
}
usort($disp_user_arr, 'sortByNbToday');

print_r($disp_user_arr);

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: Array ( [0] => Array ( [u_id] => 9 [u_name] => Souhaila S. [r_nb_today] => 7 ) [1] => Array ( [u_id] => 59 [u_name] => Cirine E. [r_nb_today] => 2 ) [2] => Array ( [u_id] => 64 [u_name] => Cyrine B. [r_nb_today] => 1 ) [3] => Array ( [u_id] => 8 [u_name] => Jihen B. R. [r_nb_today] => 1 ) [4] => Array ( [u_id] => 62 [u_name] => Alaeddine M. [r_nb_today] => 0 ) [5] => Array ( [u_id] => 12 [u_name] => Bassem D. [r_nb_today] => 0 ) [6] => Array ( [u_id] => 71 [u_name] => Desiree Y. [r_nb_today] => 0 ) [7] => Array ( [u_id] => 74 [u_name] => Ghada J. [r_nb_today] => 0 ) [8] => Array ( [u_id] => 79 [u_name] => Khaled B. [r_nb_today] => 0 ) [9] => Array ( [u_id] => 66 [u_name] => Khaoula K. [r_nb_today] => 0 ) [10] => Array ( [u_id] => 75 [u_name] => Mariem N. [r_nb_today] => 0 ) [11] => Array ( [u_id] => 18 [u_name] => Otail J. [r_nb_today] => 0 ) [12] => Array ( [u_id] => 15 [u_name] => Rim H. [r_nb_today] => 0 ) )

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