<!DOCTYPE html> <html class="no-js" id="top"> <head> <title>ProxyManager - Tuning the ProxyManager for production</title> <meta name="description" content="A proxyManager write in php" /> <meta name="keywords" content="ProxyManager, proxy, manager, ocramius, Marco Pivetta, php, production" /> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1" /> <link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro:200,300,400,600' rel='stylesheet' type='text/css'> <link href="css/styles.css" rel="stylesheet" /> <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.3/styles/default.min.css"> <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.3/highlight.min.js"></script> <script>hljs.initHighlightingOnLoad();</script> <link rel="shortcut icon" href="favicon.ico"> </head> <body> <header class="site-header"> <div class="container"> <h1><a href="index.html"><img alt="ProxyManager" src="img/block.png" /></a></h1> <nav class="main-nav" role="navigation"> <ul> <li><a href="https://github.com/Ocramius/ProxyManager" target="_blank">Github</a> <div class="bcms-clearfix"></div> </li> </ul> </nav> </div> </header> <main role="main"> <section class="component-content"> <div class="component-demo" id="live-demo"> <div class="container"> <div class="main-wrapper" style="text-align: right"> <iframe src="http://ghbtns.com/github-btn.html?user=ocramius&repo=ProxyManager&type=fork&count=true&size=large" allowtransparency="true" frameborder="0" scrolling="0" width="310" height="40"></iframe> <iframe src="http://ghbtns.com/github-btn.html?user=ocramius&repo=ProxyManager&type=watch&count=true&size=large" allowtransparency="true" frameborder="0" scrolling="0" width="200" height="40"></iframe> </div> <div class="bcms-clearfix bcms-clearfix"></div> </div> </div> <div class="component-info"> <div class="container"> <aside class="sidebar"> <nav class="spy-nav"> <ul> <li><a href="index.html">Intro</a></li> <li><a href="virtual-proxy.html">Virtual Proxy</a></li> <li><a href="null-object.html">Null Objects</a></li> <li><a href="ghost-object.html">Ghost Objects</a></li> <li><a href="remote-object.html">Remote Object</a></li> <li><a href="contributing.html">Contributing</a></li> <li><a href="credits.html">Credits</a></li> <li><a href="copyright.html">Copyright</a></li> </ul> </nav> <div class="bcms-clearfix bcms-clearfix"></div> <a class="btn btn-action btn-full download-component" href="download.html">Download</a> <div class="bcms-clearfix"></div> </aside> <div class="content"> <div class="bcms-clearfix"></div> <h3 class="section-title">Access Interceptor Scope Localizer Proxy</h3> <p>An access interceptor scope localizer is a smart reference proxy that allows you to dynamically define logic to be executed before or after any of the proxied object's methods' logic.</p> <p>It works exactly like the <a href="access-interceptor-value-holder-proxy.html">access interceptor value holder</a>, with some minor differences in behavior.</p> <p>The working concept of an access interceptor scope localizer is to localize scope of a proxied object:</p> <pre> <code class="php"> class Example { protected $foo; protected $bar; protected $baz; public function doFoo() { // ... } } class ExampleProxy extends Example { public function __construct(Example $example) { $this->foo = & $example->foo; $this->bar = & $example->bar; $this->baz = & $example->baz; } public function doFoo() { return parent::doFoo(); } } </code> </pre> <p>This allows to create a mirror copy of the real instance, where any change in the proxy or in the real instance is reflected in both objects.</p> <p>The main advantage of this approach is that the proxy is now safe against fluent interfaces, which would break an <a href="access-interceptor-value-holder-proxy.html">access interceptor value holder</a> instead.</p> <hr /> <h3>Differences with <a href="access-interceptor-value-holder-proxy.html">access interceptor value holder</a>:</h3> <ul> <li>It does <strong>NOT</strong> implement the <code>ProxyManager\Proxy\ValueHolderInterface</code>, since the proxy itself does not keep a reference to the original object being proxied</li> <li>In all interceptor methods (see <a href="access-interceptor-value-holder-proxy.html">access interceptor value holder</a>), the $instance passed in is the proxy itself. There is no way to gather a reference to the original object right now, and that's mainly to protect from misuse.</li> </ul> <hr /> <h3>Known limitations</h3> <ul> <li>It is <strong>NOT</strong> possible to intercept access to public properties</li> <li>It is <strong>NOT</strong> possible to proxy interfaces, since this proxy relies on <code>parent::method()</code> calls. Interfaces obviously don't provide a parent method implementation.</li> <li>calling unset on a property of an access interceptor scope localizer (or the real instance) will cause the two objects to be un-synchronized, with possible unexpected behaviour.</li> <li>serializing or un-serializing an access interceptor scope localizer (or the real instance) will not cause the real instance (or the proxy) to be serialized or un-serialized</li> <li>if a proxied object contains private properties, then an exception will be thrown if you use PHP <code>< 5.4.0</code>.</li> </ul> <hr /> <h3>Example</h3> <p>Here's an example of how you can create and use an access interceptor scope localizer :</p> <pre> <code class="php"> <?php use ProxyManager\Factory\AccessInterceptorScopeLocalizerFactory as Factory; require_once __DIR__ . '/vendor/autoload.php'; class Foo { public function doFoo() { echo "Foo!\n"; } } $factory = new Factory(); $proxy = $factory->createProxy( new Foo(), array('doFoo' => function () { echo "PreFoo!\n"; }), array('doFoo' => function () { echo "PostFoo!\n"; }) ); $proxy->doFoo(); </code> </pre> <p>This send something like following to your output:</p> <pre> <code class="php"> PreFoo! Foo! PostFoo! </code> </pre> <p>This is pretty much the same logic that you can find in <a href="access-interceptor-value-holder-proxy.html">access interceptor value holder</a>.</p> </main> <footer class="site-footer" role="contentinfo"> <div class="container"> <div class="footer-logos"> <ul> <li><a href="index.html">Intro</a> | </li> <li><a href="virtual-proxy.html">Virtual Proxy</a> | </li> <li><a href="null-object.html">Null Objects</a> | </li> <li><a href="ghost-object.html">Ghost Objects</a> | </li> <li><a href="remote-object.html">Remote Object</a> | </li> <li><a href="contributing.html">Contributing</a> | </li> <li><a href="credits.html">Credits</a> | </li> <li><a href="copyright.html">Copyright</a></li> </ul> </div> </div> <div class="bcms-clearfix"></div> </footer> <div class="bcms-clearfix"></div> </body> </html>