What are some potential pitfalls to avoid when sorting objects in PHP?

One potential pitfall to avoid when sorting objects in PHP is not implementing a custom comparison function correctly. If the comparison function does not return the expected values (0, -1, 1), the sorting may not work as intended. To solve this issue, ensure that the comparison function follows the correct syntax and logic. 

// Incorrect comparison function
function compareObjects($a, $b) {
    if ($a->value > $b->value) {
        return true;
    } else {
        return false;
    }
}

// Correct comparison function
function compareObjects($a, $b) {
    if ($a->value == $b->value) {
        return 0;
    }
    return ($a->value < $b->value) ? -1 : 1;
}

// Sort objects using the correct comparison function
usort($objects, 'compareObjects');

Keywords

sorting objects PHP array_multisort comparison function

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