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POHow do I return an object with array_shift() in PHP?
 

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  1. POHow do I return an object with array_shift() in PHP?
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    <p>I'm building some classes for working with playing cards. I have a Card class and a Deck class. I want to implement drawing a card from the deck by using array_shift() on an array of Card objects; this array is a property of Deck. Here is the code for the classes, which is stored in the file "cardlib.php":</p> <pre><code>&lt;?php class Card { private $suit=""; private $face=""; function __construct($suit,$face){ $this-&gt;suit=$suit; $this-&gt;face=$face; } public function getSuit(){ return $suit; } public function getFace(){ return $face; } public function display(){ echo $this-&gt;suit.$this-&gt;face; } } class Deck { private $suits=array("S","H","C","D"); private $faces=array("2","3","4","5", "6","7","8","9","10", "J","Q","K","A"); private $stack=array(); function __construct(){ foreach ($this-&gt;suits as $suit){ foreach ($this-&gt;faces as $face){ $card = new Card($suit,$face); $stack[] = $card; } } } public function doShuffle(){ shuffle($this-&gt;stack); } public function draw(){ $card = array_shift($this-&gt;stack); var_dump($card); return $card; } } ?&gt; </code></pre> <p>And here is the test code, in "index.php":</p> <pre><code>&lt;?php include_once "cardlib.php"; $myDeck=new Deck(); $myDeck-&gt;doshuffle(); $card=$myDeck-&gt;draw(); $card-&gt;display(); ?&gt; </code></pre> <p>The test code gives me the following error message:</p> <p>NULL Fatal error: Call to a member function display() on a non-object in C:\wamp\www\cardgames\index.php on line 6</p> <p>It seems that array_shift() isn't returning the reference to the card object, or I'm not properly initializing the $card variable with what array_shift() returns. How do I get the object that I want?</p>
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