What are the differences between uasort() and array_multisort() in PHP?

The main difference between uasort() and array_multisort() in PHP is that uasort() is used to sort an array with a user-defined comparison function, while array_multisort() is used to sort multiple or multi-dimensional arrays. To use uasort(), you would define a custom comparison function and pass it along with the array to be sorted. On the other hand, array_multisort() takes multiple arrays as arguments and sorts them simultaneously based on the values of one or more arrays. 

// Using uasort() to sort an array with a custom comparison function
$fruits = array("apple", "orange", "banana");
uasort($fruits, function($a, $b) {
    return strlen($a) <=> strlen($b);
});

print_r($fruits);

// Using array_multisort() to sort multiple arrays simultaneously
$names = array("John", "Jane", "Alice");
$ages = array(25, 30, 22);
array_multisort($ages, SORT_ASC, $names);

print_r($names);
print_r($ages);

Keywords

uasort array_multisort PHP sorting comparison

Related Questions