Title: Error on wp-includes/plugin.php on line 503? Last modified: August 30, 2016 --- # Error on wp-includes/plugin.php on line 503? * [martyish](https://wordpress.org/support/users/martyish/) * (@martyish) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/) * [26-Aug-2015 06:37:33 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘page_meta’ not found or invalid function name in /wp-includes/plugin.php on line 503 * I was getting this error on the plugin.php file, so i fixed it by adding an ‘ is callable’ chech to line 503 * changed it from: call_user_func_array($the_[‘function’], array_slice($args, 0, (int) $the_[‘accepted_args’])); * to this: **[code redacted as core changes should not be made to WP. If you feel this is a core issue please submit a Trac ticket at [https://core.trac.wordpress.org/%5D](https://core.trac.wordpress.org/%5D)** * Just thought Id post something to see if its something that would be changed in the future or if it is something in my theme that may be causing it. * Regards - Marty Viewing 9 replies - 1 through 9 (of 9 total) * [Justin Greer](https://wordpress.org/support/users/justingreerbbi/) * (@justingreerbbi) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477198) * Good Morning Marty, * Try deactivating all plugins. If that resolves the issue, reactivate each one individually until you find the cause.If that does not resolve the issue, try switching to the default theme for your version of WordPress to rule-out a theme- specific issue (theme functions can interfere like plugins). * IMO you may have a plugin that is adding to a filter thus making it look like WP is having issues. * [erynlynum](https://wordpress.org/support/users/erynlynum/) * (@erynlynum) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477303) * I am having the same error message and searching for a resolution also. Please let me know if you find anything. * [Justin Greer](https://wordpress.org/support/users/justingreerbbi/) * (@justingreerbbi) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477304) * The fact that the function “page_meta” is being called means that it is going to be a plugin or theme that is broken. * Have you tried: -deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s). -switching to the default theme to rule out any theme-specific problems. * [Justin Greer](https://wordpress.org/support/users/justingreerbbi/) * (@justingreerbbi) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477306) * PLEASE do not edit the core files or suggest to do so on the forums! Support for WP is extremely limited if non existent for installs that are modified. The error you are experiencing is not a WP issue, it is a PLUGIN or THEME issue. Any changes to WP core will be wiped during the next update and the issue will continue. * My previous posts are not just template responses to this issue, they are from a lot of desk pounding and knowledge of the WP codebase. Here is the logic why it is saying that the plugin.php file is at fault. * WordPress has hooks called actions and filters. They are used to hook into core functionality of WP without having to modify any WP core code (Remember, changes to core will be wiped on the next update). Plugin and themes tell WP where and what to run at certain parts of the script execution. * In the case above, WP is being told to run the function “page_meta” by a plugin or theme. The issue is that the function does not exist thus throwing the error above. Follow the steps of disabling all the plugins and enabling them one by one until the problem comes back is the correct way of tackling the issue. Contact the developer of the plugin and let them know what is going on or simply do not use that plugin/theme. * [erynlynum](https://wordpress.org/support/users/erynlynum/) * (@erynlynum) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477308) * Thank you so much, that resolved the issue for me too. * Just one more question, is this a complete fix? I don;t exactly understand the code or the error, and I just want to make sure the error was not indicating an issue with a plugin or code or anything that I further need to resolve. * I did try deactivating all plugins and I still had the error. * Thanks for any advice. * [Justin Greer](https://wordpress.org/support/users/justingreerbbi/) * (@justingreerbbi) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477309) * [@erynlynum](https://wordpress.org/support/users/erynlynum/) * Did you try to change the theme as well? This fix is not a complete fix and will come back on your next auto update or manual update. * [Justin Greer](https://wordpress.org/support/users/justingreerbbi/) * (@justingreerbbi) * [10 years, 8 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477329) * Just an update. There is a core ticket in Trac that will provide a performance increase and also provide a silent fallback is the function does not exist. * [https://core.trac.wordpress.org/ticket/26640](https://core.trac.wordpress.org/ticket/26640) * [Studio – IGS](https://wordpress.org/support/users/igs-immco-graphic-studio/) * (@igs-immco-graphic-studio) * [10 years, 5 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477452) * Hello, Thanks for your support! * I have a problem that i can not log-in how i can put off the plug-in? (if is this my problem) * This is my website [http://ingenious.immcographic.com](http://ingenious.immcographic.com) * some one can help me! Thanks * [Andrew Nevins](https://wordpress.org/support/users/anevins/) * (@anevins) * WCLDN 2018 Contributor | Volunteer support * [10 years, 5 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477453) * > (if is this my problem) * Let’s open a new thread to explore that: [https://wordpress.org/support/forum/how-to-and-troubleshooting#postform](https://wordpress.org/support/forum/how-to-and-troubleshooting#postform) Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Error on wp-includes/plugin.php on line 503?’ is closed to new replies. ## Tags * [edit](https://wordpress.org/support/topic-tag/edit/) * [plugin.php](https://wordpress.org/support/topic-tag/plugin-php/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 9 replies * 5 participants * Last reply from: [Andrew Nevins](https://wordpress.org/support/users/anevins/) * Last activity: [10 years, 5 months ago](https://wordpress.org/support/topic/error-on-wp-includespluginphp-on-line-503/#post-6477453) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics