Calling a function from an href tag

[tec]

This is my menu code on my index.php:

function menu_case($selected)
{
	switch($selected)
	{
		case 0:
			echo add_product_form();
			break;
		case 1:
			echo find_products();
			break;
		default:
			echo find_products();
			break;
	}
}

When the page loads I have find_products() as a default value, on the same page I have a "Add Product" which will link to a function, how can I do that?

I have tried doing this but I get an error:

<a href='<? menu_case(0) ?>' class='style10'>Add Product</a> | Add  Category<br><HR></td>

Note that my add_product_form() contains a form which be displayed on the same page.

[devinemke]

what do find_products() and add_product_form() output? a form? if so then the entire form will be in your href tag which syntactically wrong. i suggest a different approach:

<a href="<?php echo $_SERVER['PHP_SELF'] . '?function=add_product_form'; ?>">Add Product</a><br>
<a href="<?php echo $_SERVER['PHP_SELF'] . '?function=add_category_form'; ?>">Add Category</a><br>

<?php
$function_array = array(
'find_products',
'add_product_form',
'add_category_form'
);

if (isset($_GET['function']) && in_array($_GET['function'], $function_array)) {$function = $_GET['function'];}
else {$function = 'find_products';}

call_user_func($function);
?>

[Oersoep]

PHP works on the server.

When the link gets clicked, or even rendered, it's already at the client side (the visitor's computer).

Starting up functions in href='' tag-attributes only works with client-side languages, like javascript.