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+--- Thread: referrer solution (previous uri) (/thread-55019.html)
referrer solution (previous uri) - El Forum - 10-05-2012
[eluser]GrahamDj28[/eluser]
Hi All!
I have seen a lot of people using http_referer for redirecting to a previous page. But I have also read that this is not reliable, as it is not always set and can easily be injected with fake information by the client.
Needing a solution I have come up with this.
I have extended the CI_URI class by creating a MY_Uri.php
Copied the _reindex_segments method form the original class and added it to MY_Uri.php
Code:
public function _reindex_segments() {
// Call the the referer method
$this->set_referer();
array_unshift($this->segments, NULL);
array_unshift($this->rsegments, NULL);
unset($this->segments[0]);
unset($this->rsegments[0]);
}
private function set_referer() {
// Set the base url
if (isset($_SERVER['HTTP_HOST'])) {
$base_url = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off' ? 'https' : 'http';
$base_url .= '://'. $_SERVER['HTTP_HOST'];
$base_url .= str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);
}
// Set the current url
$url = rtrim($base_url,'/').$this->uri_string.'.html';
// Check if referer has been set, if so, set it as previous url
// If it has not been set it means this is the first page call
if(array_key_exists('referer', $_SESSION)) {
// Check that the current url is not the same as the previously set referer
// We do this incase the current page is refreshed
if($url !== $_SESSION['referer']) {
$_SESSION['prev_url'] = $_SESSION['referer'];
}
}
// Set the referer url
$_SESSION['referrer'] = $url;
}Now if I want to return to the previous page I can just call
Code:
$_SESSION['prev_url']Thanks!