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1 <!DOCTYPE html> 2 <html class="no-js" id="top"> 3 <head> 4 <title>ProxyManager - Tuning the ProxyManager for production</title> 5 6 <meta name="description" content="A proxyManager write in php" /> 7 <meta name="keywords" content="ProxyManager, proxy, manager, ocramius, Marco Pivetta, php, production" /> 8 <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1" /> 9 <link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro:200,300,400,600' rel='stylesheet' type='text/css'> 10 <link href="css/styles.css" rel="stylesheet" /> 11 <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.3/styles/default.min.css"> 12 <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.3/highlight.min.js"></script> 13 <script>hljs.initHighlightingOnLoad();</script> 14 <link rel="shortcut icon" href="favicon.ico"> 15 </head> 16 <body> 17 18 <header class="site-header"> 19 <div class="container"> 20 <h1><a href="index.html"><img alt="ProxyManager" src="img/block.png" /></a></h1> 21 22 <nav class="main-nav" role="navigation"> 23 <ul> 24 <li><a href="https://github.com/Ocramius/ProxyManager" target="_blank">Github</a> 25 <div class="bcms-clearfix"></div> 26 </li> 27 </ul> 28 </nav> 29 </div> 30 </header> 31 <main role="main"> 32 <section class="component-content"> 33 34 <div class="component-demo" id="live-demo"> 35 <div class="container"> 36 <div class="main-wrapper" style="text-align: right"> 37 <iframe src="http://ghbtns.com/github-btn.html?user=ocramius&repo=ProxyManager&type=fork&count=true&size=large" 38 allowtransparency="true" frameborder="0" scrolling="0" width="310" height="40"></iframe> 39 40 <iframe src="http://ghbtns.com/github-btn.html?user=ocramius&repo=ProxyManager&type=watch&count=true&size=large" 41 allowtransparency="true" frameborder="0" scrolling="0" width="200" height="40"></iframe> 42 43 </div> 44 <div class="bcms-clearfix bcms-clearfix"></div> 45 </div> 46 </div> 47 <div class="component-info"> 48 <div class="container"> 49 <aside class="sidebar"> 50 <nav class="spy-nav"> 51 <ul> 52 <li><a href="index.html">Intro</a></li> 53 <li><a href="virtual-proxy.html">Virtual Proxy</a></li> 54 <li><a href="null-object.html">Null Objects</a></li> 55 <li><a href="ghost-object.html">Ghost Objects</a></li> 56 <li><a href="remote-object.html">Remote Object</a></li> 57 <li><a href="contributing.html">Contributing</a></li> 58 <li><a href="credits.html">Credits</a></li> 59 <li><a href="copyright.html">Copyright</a></li> 60 </ul> 61 </nav> 62 <div class="bcms-clearfix bcms-clearfix"></div> 63 <a class="btn btn-action btn-full download-component" 64 href="download.html">Download</a> 65 <div class="bcms-clearfix"></div> 66 </aside> 67 68 <div class="content"> 69 <div class="bcms-clearfix"></div> 70 <h3 class="section-title">Access Interceptor Scope Localizer Proxy</h3> 71 72 <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> 73 74 <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> 75 76 <p>The working concept of an access interceptor scope localizer is to localize scope of a proxied object:</p> 77 78 <pre> 79 <code class="php"> 80 class Example 81 { 82 protected $foo; 83 protected $bar; 84 protected $baz; 85 86 public function doFoo() 87 { 88 // ... 89 } 90 } 91 92 class ExampleProxy extends Example 93 { 94 public function __construct(Example $example) 95 { 96 $this->foo = & $example->foo; 97 $this->bar = & $example->bar; 98 $this->baz = & $example->baz; 99 } 100 101 public function doFoo() 102 { 103 return parent::doFoo(); 104 } 105 } 106 </code> 107 </pre> 108 109 <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> 110 111 <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> 112 <hr /> 113 <h3>Differences with <a href="access-interceptor-value-holder-proxy.html">access interceptor value holder</a>:</h3> 114 115 <ul> 116 <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> 117 <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> 118 </ul> 119 <hr /> 120 121 <h3>Known limitations</h3> 122 123 <ul> 124 <li>It is <strong>NOT</strong> possible to intercept access to public properties</li> 125 <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> 126 <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> 127 <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> 128 <li>if a proxied object contains private properties, then an exception will be thrown if you use PHP <code>< 5.4.0</code>.</li> 129 </ul> 130 <hr /> 131 <h3>Example</h3> 132 133 <p>Here's an example of how you can create and use an access interceptor scope localizer :</p> 134 135 <pre> 136 <code class="php"> 137 <?php 138 139 use ProxyManager\Factory\AccessInterceptorScopeLocalizerFactory as Factory; 140 141 require_once __DIR__ . '/vendor/autoload.php'; 142 143 class Foo 144 { 145 public function doFoo() 146 { 147 echo "Foo!\n"; 148 } 149 } 150 151 $factory = new Factory(); 152 153 $proxy = $factory->createProxy( 154 new Foo(), 155 array('doFoo' => function () { echo "PreFoo!\n"; }), 156 array('doFoo' => function () { echo "PostFoo!\n"; }) 157 ); 158 159 $proxy->doFoo(); 160 </code> 161 </pre> 162 163 <p>This send something like following to your output:</p> 164 165 <pre> 166 <code class="php"> 167 PreFoo! 168 Foo! 169 PostFoo! 170 </code> 171 </pre> 172 173 <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> 174 175 </main> 176 177 <footer class="site-footer" role="contentinfo"> 178 <div class="container"> 179 <div class="footer-logos"> 180 <ul> 181 <li><a href="index.html">Intro</a> | </li> 182 <li><a href="virtual-proxy.html">Virtual Proxy</a> | </li> 183 <li><a href="null-object.html">Null Objects</a> | </li> 184 <li><a href="ghost-object.html">Ghost Objects</a> | </li> 185 <li><a href="remote-object.html">Remote Object</a> | </li> 186 <li><a href="contributing.html">Contributing</a> | </li> 187 <li><a href="credits.html">Credits</a> | </li> 188 <li><a href="copyright.html">Copyright</a></li> 189 </ul> 190 </div> 191 </div> 192 193 <div class="bcms-clearfix"></div> 194 </footer> 195 <div class="bcms-clearfix"></div> 196 </body> 197 </html>
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