session_start() takes long time and makes pages pending

Question

I've used the session_start() func in the ajax files.
First File:

<?php
// First File
if(session_id() == '')
    session_start();
sleep(10);

And Second File: (run after 10 seconds, I don't know Why!)

<?php
// Second File
if(session_id() == '')
    session_start();
echo 'Second File'; // print after 10 seconds...

When I'm run two Ajax files at the same time, the second file will wait(pending) until the first file to be completed.
What is the reason? The problem has resolved when i removed session_start().
How to solve this problem?

Solution: session_write_close(); and PHP Session Lockes

<?php
        // First File
        if(session_id() == '')
            session_start();
        session_write_close();
        sleep(10);

because you have `sleep(10)`, take it out.... `sleep` will delay execution — Andrew, Oct 21 '15 at 05:40
why are you give sleep(10) in php file you can try in Jquery — Shashikant Chauhan, Oct 21 '15 at 05:43
The files called a separate ajax request. sleep(10) is just an example. — Mohsen Movahed, Oct 21 '15 at 05:47
_"run after 10 seconds, I don't know Why"_ = `sleep(10);` . did you copy someone else's code? make sure you know what a function does before you use it — Luthando Ntsekwa, Oct 21 '15 at 05:48
The problem is session_start() but What is the reason? I've tested this code with the session_start and without session_start. — Mohsen Movahed, Oct 21 '15 at 05:53
did you mean to say,these are two separate PHP files and when you run both files simultaneously,second file waits until first one gets executed? — Dinesh Belkare, Oct 21 '15 at 06:00
the reason why the second file run around 10 seconds is because you have `sleep` function executed in your first file. `sleep` will delay the program execution time and not just your first file — Andrew, Oct 21 '15 at 06:16
No. The problem is not this case because AJAX is asynchronous. — Mohsen Movahed, Oct 21 '15 at 06:26

score 1 · Accepted Answer · answered Nov 21 '21 at 13:03

1

Solution: session_write_close(); and PHP Session Lockes

<?php
        // First File
        if(session_id() == '')
            session_start();
        session_write_close();
        sleep(10);

answered Nov 21 '21 at 13:03

Mohsen Movahed

418
5
22

score 0 · Answer 2 · edited Oct 21 '15 at 05:45

0

sleep(10) means wait for 10 seconds.It is used for adding delay in code. check here

edited Oct 21 '15 at 05:45

Luthando Ntsekwa

4,192
6
23
52

answered Oct 21 '15 at 05:44

Dinesh Belkare

639
8
24

session_start() takes long time and makes pages pending

2 Answers2