Few basic questions about OOP PHP
<ol>
<li>What is difference between variable and object in PHP`?</li>
<li>What is difference between "public static function ()" and "function ()" Which one is recommended.</li>
<li><p>What does this kind of statement mean: </p>

<p>&lt;&lt;&lt;'EOT'
bar
EOT;</p></li>
<li><p>What is purpose of empty construct in the class? like: <code>private __construct() { }</code> </p></li>
</ol>

<p>Thanks.</p>
