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[resolved] White Screen of Death when editing large posts and/or pages (6 posts)

  1. unreal4u
    Member
    Posted 3 years ago #

    Hello everybody...

    I am really confused about this little problem... On one host (test host) when I edit some real large post (my best guess: more than 64kb), no problems occur. However, when I'm posting the exact same message on the production server, I get a white screen on wp-admin/post.php and the post doesn't update.

    What I've tried and didn't worked:
    - Raising the memory limit up to 256M.
    - Going back to the default theme.
    - Desactivating all plugins.
    - Checking for SuExec on the production machine (not installed BTW).

    Note: the white screen is inmediate, no PHP timeout. When WP-DEBUG === TRUE, only a white screen appears. Everything else works just fine, including editing small posts and/or pages.

    Any other ideas to apply? The installed versions are:
    Test: 32bit PHP 5.2.14 with xDebug
    Production: 64bit PHP 5.2.10

    Any thoughts on this one? Should I post it in the advanced section?

    Greetings !

  2. dcannon1
    Member
    Posted 3 years ago #

    Try installing a totally clean copy of WordPress freshly downloaded and see if you get the same problem.

  3. unreal4u
    Member
    Posted 3 years ago #

    Ok, will try that tonight. However, I don't think it will solve the problem, i did a scp to the production server so everything should be right.

    I forgot that I have also tried different browsers with the same result (Well, should be, as it is a PHP issue, not a browser issue).

    Greetings !

  4. unreal4u
    Member
    Posted 3 years ago #

    After reinstalling WP 3.0.1, WP 3.0.0, and trying endlessly different solutions... I've kind of solved it, and it has nothing to do with whatever was posted before...

    I copied/pasted a LOT of lorem ipsum text just to see whether it was a post size problem, but everything was ok. In total, 2x 150 paragraphs, 2x 17939 words, 2x 120716 bytes of Lorem Ipsum text, which was far up the 4.553 bytes text I was trying to post. (Thanks to lorem ipsum btw, you've helped a lot of times xD)

    With the lorem ipsum result, the only problem could be in the text itself... the only "strange" character was the "@", which was repeated a lot of times (it is a page which displays many, many emails). I replaced all occurrences of @ with some other text ( :%s/@/(in)/g did the trick) and violá: everything was normal.

    Conclusion:
    I don't think this is a specific WP bug, because on my test server I have no problems at all with the same "@-contaminated" text. Could it be some spam filter on the hosting? It that even possible?

    Greetings.

  5. Just to be sure, try deactivating all plugins. If that resolves the issue, reactivate each one individually until you find the cause.

    If that does not resolve the issue, try switching to the Default theme (WordPress 1.5 - 2.9.2) or the Twenty Ten theme (WordPress 3.0 and higher) to rule-out a theme-specific issue.

    If neither of those help, it's possible that a server-side security script (probably mod_security) is preventing text with the @ symbol from being passed to the database via PHP's POST command, and you should definitely contact your hosting provider about that.

  6. unreal4u
    Member
    Posted 3 years ago #

    @James: that was the first thing I did.

    I have completely solved the problem: on the hosting, there was a php.ini value which was the cause of the problem: it was auto-prepending a file called anti-spam-v2.php so a simple php_value auto_prepend_file none in my .htaccess was enough to completely solve the issue.

    Greetings.

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