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[resolved] WP Admin white screen of death (8 posts)

  1. seb_g
    Member
    Posted 2 years ago #

    I've read all topics about white screen of death and I didn't find the solution of my problem.

    The thing is that I have created a network of 265 blogs. I use the domain mapping plugin in order to have every single site working with different domain.

    Unfortunately some time ago I started getting white screen of death when I try to enter /wp-admin/ in the main site and in each single blog. All sites are working properly, but there is no possibility to enter the admin page. I can't find the reason of this situation. It just started without my interference.

    I've tried everything. Firstly I thought that someone hacked my network. I searched files for any changes, I reinstalled my WordPress and it didn't help.

    Then I thought that one of my plugins could cause the problem, so I changed the name of my plugins directory. The result was the same - white screen.

    I searched my datebase for any signs of hacking, but I couldn't find nothing.

    I looked for phrases: iframe and noscript.

    Do you have any ideas?

  2. You could try a scan at http://sitecheck.sucuri.net/scanner/

    Every single wp-admin is a WSoD... Did you rename the mu-plugins folder as well?

  3. seb_g
    Member
    Posted 2 years ago #

    Mu-plugins are located in plugins directory in wp-content. I did not create the mu-plugins folder, because there none of the plugins needed this.

    Sitecheck says that site is clean...

  4. So "I'm not using mu-plugins" (you know if I don't ask we'll spend hours down the wrong path).

    Check your server's error log for PHP errors related to wp-admin.

  5. seb_g
    Member
    Posted 2 years ago #

    I checked the server's error log and there are only warnings, but I don't know if they have any influence on wp-admin.

    [Tue Nov 01 17:19:21 2011] [error] [client 207.46.204.192] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/user/domains/my_domain/public_html/wp-config.php:1) in /home/user/domains/my_domain/public_html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 1577
    [Tue Nov 01 17:21:04 2011] [error] [client 157.55.17.200] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/user/domains/my_domain/public_html/wp-config.php:1) in /home/user/domains/my_domain/public_html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 1577
    [Tue Nov 01 17:28:24 2011] [error] [client 157.55.17.200] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/user/domains/my_domain/public_html/wp-config.php:1) in /home/user/domains/my_domain/public_html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 1577
    [Tue Nov 01 17:29:35 2011] [error] [client 66.249.72.198] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/user/domains/my_domain/public_html/wp-config.php:1) in /home/user/domains/my_domain/public_html/wp-content/plugins/wordpress-mu-domain-mapping/domain_mapping.php on line 712
    [Tue Nov 01 17:29:36 2011] [error] [client 66.249.72.198] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/user/domains/my_domain/public_html/wp-config.php:1) in /home/user/domains/my_domain/public_html/wp-content/plugins/wordpress-mu-domain-mapping/domain_mapping.php on line 712
  6. If it's the Headers already sent problem, then make a backup copy of your wp-config.php and put that in a safe place.

    Then edit your wp-config.php and look for any blank lines, spaces, or tabs that don't belong there. If anything goes grossly wrong, restore that backup copy of that file.

    http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F

  7. seb_g
    Member
    Posted 2 years ago #

    I edited the wp-config.php file with Dreamweaver now, because I changed the password to wp-admin with Notepad and there were spaces.

    Thank you very much, the problem is solved.

  8. Ruben.cc
    Member
    Posted 1 year ago #

    Just adding to the possible solutions, since I didn't manage to solve it using any of the solutions found online (here and elsewhere). After almost tearing my hair out I decided to try an alternative method to move my files and the problem was gone!

    This will only work if you're moving from host to host that both use cPanel (most do I believe). Instead of using FTP to download the wp-admin folder and uploading it again, I used the cPanel File Manager to ZIP the entire wp-admin folder, download it, upload it to the other host and unpacking it (after renaming the already present wp-admin to something else).

    Problem solved for me, hope it can be of use for others too!

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