Creating Dynamic, Session-Aware Links
$name = urlencode(session_name());
$id = urlencode(session_id());
echo "<a href=\"page.php?$name=$id\">dynamic
link</a>";
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Using session.use_trans_sid to automatically update all links to contain the session ID, if required, is a good thing; however, it does not work if those links are dynamically generated by PHP. However, PHP offers two functions that provide all information that is needed:
Therefore, the preceding code creates a dynamic link that contains this information, enabling the programmer to make dynamic links session-aware.
One potential output of this code is the following:
<a href="page.php?PHPSESSID=
5b25b64843fad0d1afb4286cfe0ed448">dynamic
link</a>
When you use an HTML form, PHP automatically appends the session ID to the action attribute of the form. However, if you want to use dynamic forms, you can add a hidden form field to the form, containing the session information:
<?php
$name = htmlspecialchars(session_name());
$id = htmlspecialchars(session_id());
echo "<input type=\"hidden\" name=\"$name\"
value=\"$id\" />";
?>
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