Title: PHP errors with WordPress 4.9.x
Last modified: April 10, 2018

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# PHP errors with WordPress 4.9.x

 *  [irvingpop](https://wordpress.org/support/users/irvingpop/)
 * (@irvingpop)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/php-errors-with-wordpress-4-9-x/)
 * Hello, after upgrading to WordPress 4.9 (tested on 4.9.2 and 4.9.5) I’ve started
   seeing the following PHP errors repeatedly on every page load:
 * >  [09-Apr-2018 20:07:25] WARNING: [pool wordpress] child 1163 said into stderr:“
   > NOTICE: PHP message: PHP Warning: fopen(): Filename cannot be empty in /opt/
   > wordpress/releases/6961904477ab2b7a53374326a07cb819/wp-includes/functions.php
   > on line 4834”
   >  [09-Apr-2018 20:07:25] WARNING: [pool wordpress] child 1163 
   > said into stderr: “NOTICE: PHP message: PHP Warning: fread() expects parameter
   > 1 to be resource, boolean given in /opt/wordpress/releases/6961904477ab2b7a53374326a07cb819/
   > wp-includes/functions.php on line 4837” [09-Apr-2018 20:07:25] WARNING: [pool
   > wordpress] child 1163 said into stderr: “NOTICE: PHP message: PHP Warning: 
   > fclose() expects parameter 1 to be resource, boolean given in /opt/wordpress/
   > releases/6961904477ab2b7a53374326a07cb819/wp-includes/functions.php on line
   > 4840”
 * I was able to isolate these errors to the Cornerstone 0.7.5 plugin, after disabling
   all other plugins.

The topic ‘PHP errors with WordPress 4.9.x’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/cornerstone.svg)
 * [Cornerstone](https://wordpress.org/plugins/cornerstone/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/cornerstone/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/cornerstone/)
 * [Active Topics](https://wordpress.org/support/plugin/cornerstone/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/cornerstone/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/cornerstone/reviews/)

 * 0 replies
 * 1 participant
 * Last reply from: [irvingpop](https://wordpress.org/support/users/irvingpop/)
 * Last activity: [8 years, 1 month ago](https://wordpress.org/support/topic/php-errors-with-wordpress-4-9-x/)
 * Status: not resolved