示例1： 使用PayPal

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="youremail@yourdomain.com">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="item_name" value="My Product">
<input type="hidden" name="amount" value="10.00">
<input type="image" src="http://www.paypalobjects.com/en_US/i/btn/x-click-but01.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
</form>

示例2： 使用Stripe

<form action="charge.php" method="post" id="payment-form">
<span class="payment-errors"></span>
<div class="form-row">
<label>
<span>Card Number</span>
<input type="text" size="20" data-stripe="number">
</label>
</div>
<div class="form-row">
<label>
<span>Expiration (MM/YY)</span>
<input type="text" size="2" data-stripe="exp_month">
</label>
<span>/</span>
<input type="text" size="2" data-stripe="exp_year">
</div>
<div class="form-row">
<label>
<span>CVC</span>
<input type="text" size="4" data-stripe="cvc">
</label>
</div>
<input type="submit" class="submit" value="Submit Payment">
</form>