How can PHP closures be utilized for sorting arrays of objects by a specific property?

When sorting arrays of objects by a specific property in PHP, closures can be utilized by creating a custom comparison function that accesses the desired property of the objects. This comparison function can then be passed to the `usort()` function along with the array to be sorted. By using a closure, we can create a flexible and reusable solution for sorting arrays of objects by any desired property. 

// Define an array of objects to be sorted
$objects = [
    (object) ['name' => 'John', 'age' => 30],
    (object) ['name' => 'Jane', 'age' => 25],
    (object) ['name' => 'Alice', 'age' => 35]
];

// Sort the array of objects by the 'age' property using a closure
usort($objects, function ($a, $b) {
    return $a->age <=> $b->age;
});

// Output the sorted array of objects
foreach ($objects as $object) {
    echo $object->name . ' - ' . $object->age . PHP_EOL;
}

Keywords

PHP closures sorting arrays objects

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