ScopedResourceAllocator

scope.php

<?php
class ScopedResourceAllocator
{
    private $closure = null;
    public function __construct(Closure $closure)
    {
        $this->closure = $closure;
    }
    public function __destruct()
    {
        $closure = $this->closure;
        $closure();
    }
}

function foo()
{
    try {
        $x = new ScopedResourceAllocator(function () {
            print "restoring  memory limit to 128\n";
        });

        print "setting memory limit to 512\n";

        throw new \RuntimeException;
    }
    catch (Exception $ex) {
        print "exception\n";
    }
}

foo();

/**
 * output will be:
 *
 * setting memory limit to 512
 * exception
 * restoring  memory limit to 128
*/
?>