Use of ob_start is emptying the session variable in PHP, why ?

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Working with core php, Using ob_start with session is gets complicated.

First Page

<?php 

session_start();
ob_start();

$_SESSION['mobile'] = "98057*****";

header("location:$nextPageUrl");

?>



Next Page

<?php
echo $_SESSION['mobile'];
?>


*It seems like $_SESSION['mobile'] does not have any value on next page. What is causing this ?

What I have tried:

Solution I already used is:
 - ob_clean() added after header().
 - ob_flush() added after header().
 - ob_end_clean() added after header.
 - ob_end_clean() at the end of the page.

But getting same problem. Any suggestions and help will be 
appreciated.

Posted 20-Oct-22 20:35pm

Satish Thakur 2022

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Member 15627495 · Answer 1 · 2022-10-20T21:25:00

Solution 1

Hello !

just make the ob_start before session_start.

PHP: session_start - Manual[^]

this case is fixed when you know that ob_start() is a new buffer creation, like does session_start()...
it's a conflict about buffer resources.
ob_start() maje the buffer area empty, so the session vars are deleted..

ob_start();
session_start();

Posted 20-Oct-22 21:25pm

Member 15627495

Updated 20-Oct-22 21:47pm

v2

Comments

Satish Thakur 2022 21-Oct-22 5:11am

putting ob_start() above not working, On the same page session giving value but not on another page. I'm still stuck :(
Do I need to use ob_clean() somewhere on page ?