How can special characters be prioritized at the beginning of a sorted list in PHP?

Special characters can be prioritized at the beginning of a sorted list in PHP by using the `usort()` function with a custom comparison function. In the custom comparison function, you can define the sorting logic to prioritize special characters before alphanumeric characters. 

$items = ["@", "3", "!", "1", "&", "2"];

usort($items, function($a, $b) {
    if (ctype_alnum($a) && !ctype_alnum($b)) {
        return 1;
    } elseif (!ctype_alnum($a) && ctype_alnum($b)) {
        return -1;
    } else {
        return strnatcasecmp($a, $b);
    }
});

print_r($items);

Keywords

PHP special characters sorting array usort

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