Params Extension
----------------

Array params_parse(string $format, ...);

$format is a type specifier string containin one or more of the following type specifiers:

b	The parameter will be converted to boolean and added to the output stack
l	The parameter will be converted to long (integer) and added to the output stack
d	The parameter will be converted to double (float) and added to the output stack
s	The parameter will be converted to string and added to the output stack
a	The parameter will be converted to array and added to the output stack
o	The parameter will be converted to an object and added to the output stack
O	The parameter must be an object of the type(s) specified by the next argument to params_parse()
r	The parameter must be a resource (of any type)
R	The parameter must be a resource of the type(s) specified by the next argument to params_parse()
z	The parameter will be added to the output stack regardless of type
*	The output stack will be populated with an array containing a variable number of arguments as passed
+	Same as '*' but at least one var-arg is required

A single pipe '|' may be used in the format specifier to split required arguments from optional arguments.

If params_parse() is unable to return the requested types (because of 'r', 'R', or 'O' type checking failures or insufficient args), it will return false.

Usage:

function example()
{
	list($foo, $bar, $baz) = params_parse("slr");
	// $foo will be a string
	// $bar will be a long (integer)
	// $baz will be a resource
}


function ex2()
{
	list($foo, $bar, $baz) = params_parse("O|lb", "stdClass");
	// $foo will be an object of type stdClass
	// $bar will be a long (integer), with a default value of 0
	// $baz will be a double (float), with a default value of 0.0
}

function ex3()
{	
	list($foo) = params_parse("O", array("A", "B", "C"));
	// $foo will be an object of type A, B, or C
}

function ex4()
{
	list($foo) = params_parse("O", true);
	// $foo will be an object of any type, but must be passed as an object (will not be converted)
}

function ex5()
{
	list($fp, $obj) = params_parse("RO", "stream", "stdClass");
	// $fp will be a stream (file) resource
	// $obj will be an object of type stdClass
}