How can one handle empty fields in an array when sorting in PHP?

When sorting an array in PHP that contains empty fields, the empty fields may cause unexpected results or errors. To handle empty fields during sorting, you can use a custom comparison function that treats empty fields as a special case and places them at the end of the sorted array. 

// Sample array with empty fields
$array = [3, 1, '', 5, 2, '', 4];

// Custom comparison function to handle empty fields
function customSort($a, $b) {
    if ($a === '') {
        return 1;
    } elseif ($b === '') {
        return -1;
    } else {
        return $a - $b;
    }
}

// Sort the array using the custom comparison function
usort($array, 'customSort');

// Output the sorted array
print_r($array);

Keywords

array sorting empty fields PHP handling

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