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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<title>Hacker's Corner</title>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+<h1>Please Don't Fear!</h1>
+<b>Sandbox:</b> Let's Roll!<br />
+<p>
+    <?php
+        error_reporting(E_ALL | E_STRICT);
+        ini_set("display_errors", 1);
+
+        /* pass by reference, otherwise arguments get duped */
+        function calc_square(&$var)
+        {
+            $var *= $var;
+        }
+
+        function num_raised(&$var, $base = 2, $pow = 3) /* yeah */
+        {
+            $var = 1;
+            while ($pow--)
+                $var *= $base;
+        }
+
+        /* unlike Lua, we have to pass all arguments to the functions */
+        function print_pi($str)
+        {
+            $pi = 3.14159;
+            return "Pi = " . $pi . " " . $str . ".<br />";
+        }
+
+        echo print_pi("brotato");
+
+        $number = 11;
+        calc_square($number);
+        echo "a square of 11 is " . $number . ".<br />";
+
+        $number2 = NULL; /* nice to know how to modiy a variable */
+        num_raised($number2, 2, 4);
+        echo "a cube of 2 is " . $number2 . ".<br />";
+        var_dump($number2);
+    ?>
+</p>
+    <p>PHP defined variables including mine.</p>
+<pre>
+    <?php
+        print_r(get_defined_vars());
+    ?>
+</pre>
+</body>
+</html>
+