This is a simple WordPress shortcode to add a Paypal button

paypal-shortcode.php

<?php
/* 
Plugin Name: PayPal Shortcode by Darren
Plugin URI: https://gist.github.com/3266387
Description: This is a simple shortcode to add a Paypal button, just use [paypal] as the shortcode.
Version: 0.1
Author: 
Author URI: 
License: 
License URI: 
*/

function dm_paypal_function () {
	$productid = get_the_title();
	$price = get_post_custom_values('item_price');
	echo print_wp_cart_button_for_product("$productid", "$price[0]");
}

add_shortcode('paypal', 'dm_paypal_function');

it can be:

echo print_wp_cart_button_for_product($productid, $price[0]);

or

echo print_wp_cart_button_for_product("{$productid}", "{$price[0]}");

to better.

Hi, Just wondering what difference the quotes will make with this. Thanks.

Double quotes are using for VariableStrings. Like: "Hello $MyNameVariable." also they are slower than Single quotes.

Single quotes are using for SimpleStrings. Like: 'Hello YPY'. also they are faster than Double quotes.

And using { and } to variables, just increase code readability and better it. "Hello {$Micro}soft" <--- !

Thanks for the help :)