Laravel macro 示例

在运行时候动态添加函数

use Illuminate\Support\Collection;
Collection::macro('someMethod', function ($arg1 = 1, $arg2 = 1) {
    return $this->count() + $arg1 + $arg2;
});
$coll = new Collection([1, 2, 3]);
echo $coll->someMethod(1, 2);
// 6      = 3 + (1 + 2)
echo $coll->someMethod();
// 5      = 3 + (1 + 1)