Title: wp supercache error Warning: array_key_exists()
Last modified: August 20, 2016

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# wp supercache error Warning: array_key_exists()

 *  [cctvinstaller](https://wordpress.org/support/users/cctvinstaller/)
 * (@cctvinstaller)
 * [14 years, 6 months ago](https://wordpress.org/support/topic/wp-supercache-error/)
 * Hi, my site works ok, but when I try to log in I get several warnings and can’t
   log in obviously I have no access to the backend, is there anything I can do ?
   
   errors are Warning: array_key_exists() [function.array-key-exists]: The second
   argument should be either an array or an object in /home/mysite/public_html/wp-
   content/plugins/wp-super-cache/wp-cache-phase1.php on line 342
 * Warning: array_key_exists() [function.array-key-exists]: The second argument 
   should be either an array or an object in /home/mysite/public_html/wp-content/
   plugins/wp-super-cache/wp-cache-phase1.php on line 342
 * Warning: array_key_exists() [function.array-key-exists]: The second argument 
   should be either an array or an object in /home/mysite/public_html/wp-content/
   plugins/wp-super-cache/wp-cache-phase1.php on line 342
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/mysite/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase1.
   php:342) in /home/cctvorg/public_html/wp-login.php on line 337
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/mysite/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase1.
   php:342) in /home/cctvorg/public_html/wp-login.php on line 349
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/mysite/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase1.
   php:342) in /home/cctvorg/public_html/wp-includes/pluggable.php on line 690
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/mysite/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase1.
   php:342) in /home/cctvorg/public_html/wp-includes/pluggable.php on line 691
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/mysite/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase1.
   php:342) in /home/cctvorg/public_html/wp-includes/pluggable.php on line 692
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/mysite/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase1.
   php:342) in /home/cctvorg/public_html/wp-includes/pluggable.php on line 890

The topic ‘wp supercache error Warning: array_key_exists()’ is closed to new replies.

## Tags

 * [problem](https://wordpress.org/support/topic-tag/problem/)
 * [wp-supercache](https://wordpress.org/support/topic-tag/wp-supercache/)

 * 0 replies
 * 1 participant
 * Last reply from: [cctvinstaller](https://wordpress.org/support/users/cctvinstaller/)
 * Last activity: [14 years, 6 months ago](https://wordpress.org/support/topic/wp-supercache-error/)
 * Status: not resolved

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