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POUsing "this" and "self" in PHP
 

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    <blockquote> <p>Use $this to refer to the current object. Use self to refer to the current class. In other words, use $this->member for non-static members, use self::$member for static members.</p> </blockquote> <p><a href="http://board.phpbuilder.com/showthread.php?10354489-RESOLVED-php-class-quot-this-quot-or-quot-self-quot-keyword" rel="nofollow">http://board.phpbuilder.com/showthread.php?10354489-RESOLVED-php-class-quot-this-quot-or-quot-self-quot-keyword</a></p> <pre><code>class Demo { private static $name; private $age; public function __construct($name, $age) { self::$name = $name; $this-&gt;age=$age; } public function show() { echo "Name : ", self::$name, "&lt;br/&gt;"; //Accessing by self echo "Name : ", Demo::$name, "&lt;br/&gt;"; //Accessing by class name echo "Age : ", $this-&gt;age, "&lt;br/&gt;"; } } $demo = new Demo("Tiny", 13); $demo-&gt;show(); </code></pre> <p>This produces the following output.</p> <pre><code>Name : Tiny Name : Tiny Age : 13 </code></pre> <p>What is the difference between <code>self::$name</code> and <code>Demo::$name</code> in the preceding snippet?</p> <hr> <pre><code>class Person1 { private $name; private $address; public function __construct($name,$address) { $this-&gt;name = $name; $this-&gt;address = $address; } public function show() { echo "Name : ", $this-&gt;name, "&lt;br/&gt;"; echo "Address : ", $this-&gt;address, "&lt;br/&gt;"; //Accessing by this } } $p1=new Person1("xxx", "yyy"); $p1-&gt;show(); class Person2 { private $name; private $address; public function __construct($name,$address) { self::$name = $name; self::$address = $address; } public function show() { echo "Name : ", self::$name, "&lt;br/&gt;"; echo "Address : ", self::$address, "&lt;br/&gt;"; //Accessing by self } } $p2=new Person1("xxx", "yyy"); $p2-&gt;show(); </code></pre> <p>Preceding two classes <code>Person1</code> and <code>Person2</code> produce the same output as follows.</p> <pre><code>Name : xxx Address : yyy </code></pre> <p>What is the difference between (as in the <code>Preson1</code> class, the <code>show()</code> method)</p> <pre><code>$this-&gt;name; $this-&gt;address; </code></pre> <p>and (as in the <code>Preson2</code> class, the <code>show()</code> method)</p> <pre><code>self::$name; self::$address; </code></pre> <p><strong>in this context</strong>?</p>
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    1. COIn **[this link](http://stackoverflow.com/a/1189663/170194)**, you'll find an explanation.
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    2. COIs this homework?
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