CODEWITHSUNDEEP
php
santa
santa

Reputation: 12512

Detect redirect from specific page

I need to execute a PHP script only is a user is redirected from another page that starts with specific name. For example: domain.com/abcXXXXXX

I've tried this but it doesn't seem to work:

if (preg_match("/abc", $_SERVER['HTTP_REFERER'])) {

}

What am I missing?

Upvotes: 1

Views: 76

Answers (2)

James Craig
James Craig

Reputation: 6864

I would suggest using parse_url in conjunction with a look up table of URLs.

You can do the following:

$allowedReferals = [
    'www.google.com/maps',
    'www.google.co.uk/maps',
    'www.google.in/maps',
];

$referer = !isset($_SERVER['HTTP_REFERER']) ? null : parse_url($_SERVER['HTTP_REFERER']);

if (!is_null($referer)) {
    $host = !isset($referer['host']) ? null : $referer['host'];
    $path = !isset($referer['path']) ? null : $referer['path'];
    $referingDomain = $host . $path;

    if (in_array($referingDomain, $allowedReferals)) {
        // The referer matches one of the allowed referers in the lookup table
        // Do something...
    }

    if (preg_match('/^maps/', $path)) {
        // The referer's path begins with maps
        // Do something...
    }
}

Upvotes: 1

Oli
Oli

Reputation: 2464

Fix the regex pattern like this: 

if (preg_match("/^domain\.com\/abc/", $_SERVER['HTTP_REFERER'])) {

}

Another version to check with/without www:

if (preg_match("/[w{3}\.]?domain\.com\/abc/",'www.domain.com/abcXXXXXX')) {

}

Upvotes: 0

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