仅需要为注册会员显示证书（图像）的功能

Question

I want to junrate a certificate(image) general code from my site registers members certificate will only show on his sites.for exmple abc.com is my registerd member and he placed that code on his site like bellow

img src="mysite.com?member=abc.com"

or any code (like facebook social plugin or like plugin of facebook etc) when its calling from abc.com the code will display the certificate(image) but when same code applies to another location like www.def.com the certificate(image) should not to display.

Answer 1

You might want to do something like this:

1 Create a php file on your server called certificate.php

2 Allow your users to access it like this: <img src="http://www.yoursite.com/certificate.php?member=abc.com" />

3 Check the $_SERVER variable for HTTP_REFERER

4 See if that HTTP_REFERER contains the correct domain (abc.com)

5 Show/or don't show the image

$member = $_GET['member']; // Validate this field against an allowed list before continuing   
$referal = parse_url($_SERVER['HTTP_REFERER']);
$hostname = str_replace('www.', '', $referal['hostname']); // Remove www. part

if ($hostname == $member)
{
    // This request is coming from an abc.com website
}
else
{
    // I don't this think is coming from abc.com website
}