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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>
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