Online PHP editor | output for b5No7

@ 2020-01-11T21:42:33Z

<?php

$counted_array = [
    ["ELA-2", 7], 
    ["Science-3", 9],
    ["ELA-1", 5],
    ["Science-2", 9],
    ["ELA-4", 2], 
    ["ELA-3", 7],
    ["Science-4", 2], 
    ["Science-1", 1]
];
$assoc_array = array_map(
    function($subarray){
        return array_combine(
                   ['Subject', 'Level'], explode('-', $subarray[0], 2)
               )
               + ['Count' => $subarray[1]];
    },
    $counted_array
);

usort($assoc_array, function($a, $b) {
    return [$a['Subject'], $a['Level']]
           <=>
           [$b['Subject'], $b['Level']];
});

var_export($assoc_array);

Output for 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 ( 'Subject' => 'ELA', 'Level' => '1', 'Count' => 5, ), 1 => array ( 'Subject' => 'ELA', 'Level' => '2', 'Count' => 7, ), 2 => array ( 'Subject' => 'ELA', 'Level' => '3', 'Count' => 7, ), 3 => array ( 'Subject' => 'ELA', 'Level' => '4', 'Count' => 2, ), 4 => array ( 'Subject' => 'Science', 'Level' => '1', 'Count' => 1, ), 5 => array ( 'Subject' => 'Science', 'Level' => '2', 'Count' => 9, ), 6 => array ( 'Subject' => 'Science', 'Level' => '3', 'Count' => 9, ), 7 => array ( 'Subject' => 'Science', 'Level' => '4', 'Count' => 2, ), )

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