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POCreate two classes which use each other?
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copied!<p>In a messaging project, I have two classes, number and message. The first class does the stuff about numbers and second one does the messages processes.</p> <p><code>number->recive()</code> should call <code>message->getPass()</code>. then <code>message->getPass</code> should produce a password, and reply it to user using <code>message->send()</code>.</p> <p>and there are many situations like this that I want this class in that and that in this...</p> <p>I tried <code>$this->number = new number()</code> in message class's <code>__constructor()</code> and vice versa, but got an Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 65488 bytes).</p> <p>I think the error reason is obvious, I'm causing an infinite loop of instantiating.</p> <p>Is There Any Way to Have Two Classes Which Use Each Other? Whats the Right Way to Go?</p> <p>Thanks</p> <p>Edit 0: Thanks for super fast answers/comments!</p> <p>Edit 1: I saw this question <a href="https://stackoverflow.com/questions/4964482/how-to-create-two-classes-in-c-which-use-each-other-as-data">How to create two classes in C++ which use each other as data?</a> I don't have any idea what exactly those asterisks mean, and if I can use it in php!</p> <p>Edit 2: about the codes caused error, simply:</p> <p>test.php:</p> <pre><code>include_once './number.php'; $number = new number(); $number->recive(); </code></pre> <p>number.php:</p> <pre><code>include_once './message.php'; class number { public function __construct($numberId = NULL) { $this->message = new message(); $this->pdo = new PDO("mysql:host=localhost;dbname=madb", "root", "root"); } ... } </code></pre> <p>message.php:</p> <pre><code>class message { protected $pdo, $rows, $sql, $number; public function __construct($messageId = NULL) { $this->number = new number(); $this->pdo = new PDO("mysql:host=localhost;dbname=madb", "root", "root"); } ... } </code></pre> <p>Edid 3:</p> <p><strong>Some kind of solution maybe this:</strong> </p> <p>Add a <code>load</code> method to each class:</p> <pre><code>public function load($className) { require_once $className . '.php'; $this->{$className} = new $className(); } </code></pre> <p>so you should call <code>$this->load('number')</code> to load number class from number.php whenever I need it, and then use it in this way <code>$this->number->numberMethod()</code> .</p>

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