Say good-bye to hotlinking ... _php Foundation

The first page randomly produces a number (0-15)-"Dechex" () saved in session

Then the URL to use this tag for operation, you can calculate, but to be able to reverse the line ~

The second page detects if there is a tag, inverse it, and then takes the variable out

Advantages: (Must visit the site URL to be effective ~)

Disadvantage: (Save to the local page link all invalid, hotlinking invalidation)

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<?php
Ob_start ();
Session_Start ();
if (Isset ($_session[key])) {//have key

$key =$_session[key]; Get the key.
$str =$_server[query_string]; Get Encrypted data
$decryptstr =decrypt ($str, $key); Use the key to unlock the data (note that this is your inverse algorithm)
....//(decompose data into a variable)./..//(breaking down into variables)..//
}else{//No Key
$key =dechex (rand (0,15)); Create a key
If your page is already the last page and you do not allow hotlinking links
echo "Your link is not from this site!" Visit this page after you visit the site ... ";
Exit ();
}
?>
HTML content ........ (Here is a lot of links ...)

<?php
$htmlcontent =ob_get_contents (); Get all HTML content
...//Replace all connection parameters Href=url? The data being replaced (a set of regular) (a group of the same), or the same as the other.
Ob_end_flush (); Output HTML content (href= already encrypted data)
?>