get variables in php get_defined_vars()

get_defined_vars

<?php
$variables=get_defined_vars();
foreach($variables as $keys=>$val)
{
	echo "$".$keys."=null;"."<br/>";
}
/*

Since get_defined_vars() only gets the variables at the point you call the function, there is a simple way to get the variables defined within the current scope.
*/
// The very top of your php script
$vars = get_defined_vars();

// Now do your stuff
$foo = 'foo';
$bar = 'bar';

// Get all the variables defined in current scope
$vars = array_diff(get_defined_vars(),$vars);

echo '<pre>';
print_r($vars);
echo '</pre>';
?>