Title: PHP Warning: in_array() expects parameter 2 to be array, boolean given in Last modified: April 16, 2019 --- # PHP Warning: in_array() expects parameter 2 to be array, boolean given in * Resolved [Ismail Siraje Ittembe](https://wordpress.org/support/users/ismailsirajeittembe/) * (@ismailsirajeittembe) * [7 years, 1 month ago](https://wordpress.org/support/topic/php-warning-in_array-expects-parameter-2-to-be-array-boolean-given-in/) * [17-Jan-2019 13:47:20 UTC] PHP Warning: in_array() expects parameter 2 to be array, boolean given in /home/kessgbgf/isisofttechnologies.com/wp-content/mu- plugins/swift-performance-loader.php on line 13 [18-Jan-2019 15:56:25 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class‘ N2WordpressAssetInjector’ not found in /home/kessgbgf/isisofttechnologies.com/ wp-content/plugins/smart-slider-3/library/smartslider/plugins/item/image/image. php on line 112 [18-Jan-2019 15:56:25 UTC] PHP Fatal error: Class ‘Swift_Performance_Lite’ not found in /home/kessgbgf/isisofttechnologies.com/wp-content/plugins/smart- slider-3/library/smartslider/plugins/item/image/image.php on line 112 [18-Jan- 2019 15:56:25 UTC] PHP Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0 [14-Feb-2019 17:10:07 UTC] PHP Warning: count(): Parameter must be an array or an object that implements Countable in /home/kessgbgf/isisofttechnologies.com/wp-includes/post-template.php on line 284 [14-Feb-2019 17:10:07 UTC] PHP Warning: count(): Parameter must be an array or an object that implements Countable in /home/kessgbgf/isisofttechnologies. com/wp-includes/post-template.php on line 284 [14-Mar-2019 09:18:01 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class‘ Swift_Performance_Cache’ does not have a method ‘clear_cache_after_post’ in / home/kessgbgf/isisofttechnologies.com/wp-includes/class-wp-hook.php on line 286[ 17-Mar-2019 18:58:18 UTC] PHP Warning: count(): Parameter must be an array or an object that implements Countable in /home/kessgbgf/isisofttechnologies.com/ wp-includes/post-template.php on line 293 [17-Mar-2019 18:58:18 UTC] PHP Warning: count(): Parameter must be an array or an object that implements Countable in/ home/kessgbgf/isisofttechnologies.com/wp-includes/post-template.php on line 293[ 17-Mar-2019 19:11:24 UTC] PHP Fatal error: Uncaught Error: Call to undefined method Swift_Performance_Lite::is_developer_mode_active() in /home/kessgbgf/isisofttechnologies. com/wp-content/plugins/swift-performance-lite/performance.php:769 Stack trace:# 0 /home/kessgbgf/isisofttechnologies.com/wp-content/plugins/swift-performance- lite/performance.php(729): Swift_Performance_Lite::prebuild_cache_hit(‘[https://isisoft…’](https://isisoft…’);)# 1 /home/kessgbgf/isisofttechnologies.com/wp-includes/class-wp-hook.php(286): Swift_Performance_Lite::prebuild_page_cache(Array) #2 /home/kessgbgf/isisofttechnologies. com/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array) #3 / home/kessgbgf/isisofttechnologies.com/wp-includes/plugin.php(531): WP_Hook->do_action( Array) #4 /home/kessgbgf/isisofttechnologies.com/wp-cron.php(133): do_action_ref_array(‘ swift_performan…’, Array) #5 {main} * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-warning-in_array-expects-parameter-2-to-be-array-boolean-given-in%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 2 replies - 1 through 2 (of 2 total) * Plugin Contributor [Fred](https://wordpress.org/support/users/fredawd/) * (@fredawd) * [7 years, 1 month ago](https://wordpress.org/support/topic/php-warning-in_array-expects-parameter-2-to-be-array-boolean-given-in/#post-11435375) * That sounds as an output buffer conflict with another plugin or with your theme, no easy fix except for disable/ re-enable plugins (and optionally briefly switching themes) one by one to see which one is causing the conflict (maybe also have a look in your php errorlog, that might have relevant info). * Which version is installed? Lite version doesn´t have a developer mode????? Also, your site seems to be compromised and dangerous. [https://cl.ly/1468ead3b2b4](https://cl.ly/1468ead3b2b4) * Thread Starter [Ismail Siraje Ittembe](https://wordpress.org/support/users/ismailsirajeittembe/) * (@ismailsirajeittembe) * [7 years, 1 month ago](https://wordpress.org/support/topic/php-warning-in_array-expects-parameter-2-to-be-array-boolean-given-in/#post-11436866) * Thanks for the reply what i did was to disable the swift performance plugin and now in my error_log file i have no issues then also i restored the old back up of January thanks though Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘PHP Warning: in_array() expects parameter 2 to be array, boolean given in’ is closed to new replies. * ![](https://ps.w.org/swift-performance-lite/assets/icon-256x256.jpg?rev=2388229) * [Swift Performance Lite](https://wordpress.org/plugins/swift-performance-lite/) * [Support Threads](https://wordpress.org/support/plugin/swift-performance-lite/) * [Active Topics](https://wordpress.org/support/plugin/swift-performance-lite/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/swift-performance-lite/unresolved/) * [Reviews](https://wordpress.org/support/plugin/swift-performance-lite/reviews/) * 2 replies * 2 participants * Last reply from: [Ismail Siraje Ittembe](https://wordpress.org/support/users/ismailsirajeittembe/) * Last activity: [7 years, 1 month ago](https://wordpress.org/support/topic/php-warning-in_array-expects-parameter-2-to-be-array-boolean-given-in/#post-11436866) * Status: resolved