PHP solution to keep the session from invalidating when cookies are disabled on the client

PHP solution to keep the session from invalidating when cookies are disabled on the client_PHP Tutorial

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Release： 2016-07-13 10:30:33

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Cookies are good, but some client browsers will disable cookies, which will cause the programs you rely on cookies to fail or make errors. So if the user turns off cookies, how should PHP be used again? There is still a session? method.

1. Set session.use_trans_sid = 1 in php.ini or turn on the enable-trans-sid option to let PHP automatically pass the session id across pages.

　2. Manually pass the value through the URL and pass the session id through the hidden form.

3. Save session_id in a file, database, etc., and call it manually during the cross-page process.

Example of route 1:

　s1.php

　2session_start();

3$_SESSION[’var1’]="Source code enthusiast";

4$url="Next page";

　5echo $url;

　6?>

　s2.php

　2session_start();

　3echo "The value of the passed session variable var1 is: ".$_SESSION[’var1’];

　4?>

Run the above code, and if the client cookie is normal, you should be able to get the result "Source Code Lover".

If you turn off the client's cookie at this time, you may not get the result. In this case, you can set session.use_trans_sid = 1 in php.ini or turn on the --enable-trans-sid option when compiling." You can get the results again "source code enthusiasts"

Example of route 2:

　s1.php

　2session_start();

3$_SESSION[’var1’]="Source code enthusiast";

　4$sn = session_id();

5$url="Next page";

　6echo $url;

7?>

　s2.php

　2session_id($_GET[’s’]);

　3session_start();

　4echo "The value of the passed session variable var1 is: ".$_SESSION[’var1’];

　5?>

The basic principle of hiding the form is the same as above.

Example of path 3: login.html

PHP solution to keep the session from invalidating when cookies are disabled on the client_PHP Tutorial

mylogin1.php

　02$name=$_POST[’name’];

03$pass=$_POST[’pass’];

　04if(!$name || !$pass) {

　05echo "The username or password is empty, please log in again";

　06die();

　07}

　08if (!($name=="youngong" && $pass=="123") {

　09echo "The username or password is incorrect, please log in again";

　10die();

　11}

　12//Registered User

　13ob_start();

　14session_start();

　15$_SESSION[’user’]= $name;

　16$psid=session_id();

　17$fp=fopen("e:tmpphpsid.txt","w+";

　18fwrite($fp,$psid);

　19fclose($fp);

　20//Identity verification successful, perform related operations

　21echo "Logged in

　22echo "Next page";

　23?>

mylogin2.php

　02$fp=fopen("e:tmpphpsid.txt","r";

　03$sid=fread($fp,1024);

　04fclose($fp);

　05session_id($sid);

　06session_start();

　07if(isset($_SESSION[’user’]) && $_SESSION[’user’]="laogong" {

　08echo "Logged in!";

　09}

　10else {

　11//Successfully logged in to perform related operations

　12echo "Not logged in, no access rights";

　13echo "Please log in to browse";

　14die();

　15}

　16?>

Please turn off cookies and try again. Username: youngong Password: 123 This is to save the session id through a file. The file is: e:tmpphpsid.txt. As for the method of using the database, I will not give an example. It is similar to the method of operating files. The above methods have one thing in common, which is to obtain the session id on the previous page, find a way to pass it to the next page, and add the code session_id (passed session id) before session_start(); on the next page; I hope it can provide you with some refer to.