Support » Fixing WordPress » WP-Cache responsible for “headers already sent” error

  • Blogs been working fine, then one day it crapped itself with this error:

    Warning: fopen(/home/dombouco/public_html/wp-content/cache/wp_cache_mutex.lock) [function.fopen]: failed to open stream: Permission denied in /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php on line 96
    
    Warning: Cannot modify header information - headers already sent by (output started at /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php:96) in /home/dombouco/public_html/wp-login.php on line 302
    
    Warning: Cannot modify header information - headers already sent by (output started at /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php:96) in /home/dombouco/public_html/wp-login.php on line 314
    
    Warning: Cannot modify header information - headers already sent by (output started at /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php:96) in /home/dombouco/public_html/wp-includes/pluggable.php on line 665
    
    Warning: Cannot modify header information - headers already sent by (output started at /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php:96) in /home/dombouco/public_html/wp-includes/pluggable.php on line 666
    
    Warning: Cannot modify header information - headers already sent by (output started at /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php:96) in /home/dombouco/public_html/wp-includes/pluggable.php on line 667
    
    Warning: Cannot modify header information - headers already sent by (output started at /home/dombouco/public_html/wp-content/plugins/wp-cache/wp-cache-phase2.php:96) in /home/dombouco/public_html/wp-includes/pluggable.php on line 868

    I have done the usual look for whitespace, to no avail. I have DELETED the wp-cache folder in the plugins folder, and yet this error still mentions the cache folder. I have also deleted the ‘cache’ folder too.

    Seriously confused.

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  • Did you ever figure out the issue? I’m having similar modify header errors, however, I have never installed the WP-Cache plugin at all. I am getting the pluggable.php line 868 tho. I’ve checked for whitespace in all the usual places too, but nothing seems to work.

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