Title: Use WP_DEBUG before update your plugin Last modified: August 21, 2016 --- # Use WP_DEBUG before update your plugin * Resolved [Sergej Müller](https://wordpress.org/support/users/sergejmueller/) * (@sergejmueller) * [12 years, 2 months ago](https://wordpress.org/support/topic/use-wp_debug-before-update-your-plugin/) * The plugin creates several errors. * Please use WordPress _prepare_ [https://codex.wordpress.org/Class_Reference/wpdb#Protect_Queries_Against_SQL_Injection_Attacks](https://codex.wordpress.org/Class_Reference/wpdb#Protect_Queries_Against_SQL_Injection_Attacks) und WP_Error functions [https://codex.wordpress.org/Class_Reference/WP_Error](https://codex.wordpress.org/Class_Reference/WP_Error) * **Always** check your plugin with [https://codex.wordpress.org/WP_DEBUG](https://codex.wordpress.org/WP_DEBUG) * Error lines: Warning: mysql_real_escape_string() expects parameter 2 to be resource, object given in /www/htdocs/wp-content/plugins/wysija-newsletters/core/model. php on line 542 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * Warning: mysql_error() expects parameter 1 to be resource, object given in /www/ htdocs/wp-content/plugins/wysija-newsletters/helpers/install.php on line 485 * [https://wordpress.org/plugins/wysija-newsletters/](https://wordpress.org/plugins/wysija-newsletters/) Viewing 4 replies - 1 through 4 (of 4 total) * [chris](https://wordpress.org/support/users/achensee/) * (@achensee) * [12 years, 2 months ago](https://wordpress.org/support/topic/use-wp_debug-before-update-your-plugin/#post-4768500) * +1 * Moderator [Dominik Schilling](https://wordpress.org/support/users/ocean90/) * (@ocean90) * WordPress Core Developer * [12 years, 2 months ago](https://wordpress.org/support/topic/use-wp_debug-before-update-your-plugin/#post-4768504) * Note: With WordPress 3.9 and PHP 5.5 WordPress will use mysqli. You shouldn’t use any mysql_* functions directly. Use the [wpdb API](https://codex.wordpress.org/Class_Reference/wpdb) instead. * [Ben](https://wordpress.org/support/users/benheu/) * (@benheu) * [12 years, 2 months ago](https://wordpress.org/support/topic/use-wp_debug-before-update-your-plugin/#post-4768625) * Hi Sergej, * Thanks for the feedback, it’s always good to be reminded of the basics. * We actually write every single line of code with the WP_DEBUG on, it’s a rule in the team. * This being said, it’s difficult for us to reproduce all the possible environments our users are having. (server configurations, WordPress versions, plugins installed, themes installed etc etc…) * Anyway, I suppose that you’re using the version 3.9 of WordPress. Am I right? We’re actually preparing our code to be compatible with 3.9, it’s not yet ready but we’re getting there. * Let me know if I’m wrong, and please do share your current configuration with us. * Finally for a better and more intimate support, get in touch with us here: [http://support.mailpoet.com/feedback/](http://support.mailpoet.com/feedback/) * Cheers! Ben * [Wysija](https://wordpress.org/support/users/wysija/) * (@wysija) * [12 years, 2 months ago](https://wordpress.org/support/topic/use-wp_debug-before-update-your-plugin/#post-4768785) * Closing this… (we’re changing our code to be compliant with WP 3.9, don’t worry guys) Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Use WP_DEBUG before update your plugin’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/wysija-newsletters_ffddcc.svg) * [MailPoet Newsletters (Previous)](https://wordpress.org/plugins/wysija-newsletters/) * [Support Threads](https://wordpress.org/support/plugin/wysija-newsletters/) * [Active Topics](https://wordpress.org/support/plugin/wysija-newsletters/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wysija-newsletters/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wysija-newsletters/reviews/) * 4 replies * 5 participants * Last reply from: [Wysija](https://wordpress.org/support/users/wysija/) * Last activity: [12 years, 2 months ago](https://wordpress.org/support/topic/use-wp_debug-before-update-your-plugin/#post-4768785) * Status: resolved