how to integrate paypal in website

I have to make a paypal integration in my website for paying person.I found a simple code

<form action="https://www.paypal.com/cgi-b开发者_运维知识库in/webscr" method="POST">

To pay with PayPal now please click on the PayPal icon below:

<input type="hidden" name="cmd" value="_xclick"><br>
<input type="hidden" name="business" value="your@paypal.email"><br>
<input type="hidden" name="item_name" value="Order #{$order_id}"><br>
<input type="hidden" name="amount" value="{$order_amount}"><br>
<input type="hidden" name="currency_code" value="{$currency_iso_3}"><br>
<input type="image" name="submit" src="http://images.paypal.com/images/x-click-but01.gif" alt="Pay with PayPal"><br>
< /form>

Is this secure for payment ?

You are sending the information over SSL/TSL.

If all the certificates are current and valid, you should be fine (so MITM attacks are less likely).

It is what banks and other financial and retail organizations are using - should be OK.

However, you did not really specify your requirements for secure integration - can you provide more information?