php / php/doc-en

using enum in $_SESSION variable causes session_start to error "Failed to decode session object. "

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Extension: session
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Description

Description

The following code:

<?php
session_start() ;

enum xxx {
   case A;
   case B;
   case C;
}


echo "Hallo, wereld" ;

$_SESSION['test'] = xxx::C;

When run TWICE!

Resulted SECOND TIME RUNNING in this output:

Warning: session_start(): Class 'xxx' not found in /home/admin/domains/xxxxxxxxx.nl/public_html/test/test.php on line 3

Warning: session_start(): Failed to decode session object. Session has been destroyed in /home/admin/domains/xxxxxxxxxxxx.nl/public_html/test/test.php on line 3
Hallo, wereld

But I expected this output instead:

Hallo, wereld
PHP Version

8.1.4

Operating System

Linux CentOs 7 -- 3.10.0-1160.59.1.el7.x86_64 php/php-src#1 SMP Wed Feb 23 16:47:03 UTC 2022 x86_64

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the two-run example using session_start(), $_SESSION, and the enum on PHP 8.1.4, paying attention to the reported “Class 'xxx' not found” and session-decoding warnings. Identify the relevant PHP documentation entry and clarify the documented behavior and expected handling of enum values in sessions.

Written by the indexing model from the issue text.

Assessment

Tech stack
php
Domain
documentation
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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