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"Cannot modify header information" error messages after switching hosts (5 posts)

  1. lukemade
    Member
    Posted 2 years ago #

    Can't login to my backend. Tried everything I could find in the forums, from adding "?>" to the end of the files to stripping out whitespace to deactivating plug-ins.

    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 699
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 700
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 701
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 702
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 705
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 706
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 707
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 708
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 711
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 712
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 713
    
    Warning: Cannot modify header information - headers already sent by (output started at /usr/home/liscios/public_html/2011-site/blog/wp-login.php:376) in /usr/home/liscios/public_html/2011-site/blog/wp-includes/pluggable.php on line 714
  2. I would also try deleting the theme you are trying to use. If the twentyeleven theme is in there, it should use that as the default

  3. lukemade
    Member
    Posted 2 years ago #

    Thanks Christine, unfortunately this is a theme that is custom tailored to our client. All was working fine until we decided to switch hosts. Got any other ideas?

  4. It might be worth testing the default theme anyway, cause if it doesn't work, then you know that the hosting provider isn't supporting WordPress properly. Perhaps they are running an old php version.

    I would contact the host and see if perhaps they have better error logs and can pinpoint the issue.

  5. lukemade
    Member
    Posted 2 years ago #

    Ok thanks. I think it might be that I switched from a host with old PHP to a host with new PHP. HRMPH

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