Title: PHP Notice ob_start constant
Last modified: August 21, 2016

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# PHP Notice ob_start constant

 *  Resolved [Lionel Pointet](https://wordpress.org/support/users/lpointet/)
 * (@lpointet)
 * [11 years, 10 months ago](https://wordpress.org/support/topic/php-notice-ob_start-constant/)
 * Hello,
 * I’m using WP-Piwik version 0.9.9.12 and when activating debug, I can see the 
   following notice:
    Notice: Use of undefined constant ob_start – assumed ‘ob_start’
   in wp-piwik/wp-piwik.php on line 762
 * Regarding trunk refactoring, this notice should now be triggered from the following
   line: [https://plugins.trac.wordpress.org/browser/wp-piwik/trunk/classes/WP_Piwik.php?rev=950165#L380](https://plugins.trac.wordpress.org/browser/wp-piwik/trunk/classes/WP_Piwik.php?rev=950165#L380)
 * The fix is kind of simple: just add “()” after “ob_start” call :).
 * Many thanks for this plugin, which is working great.
    Lionel
 * [https://wordpress.org/plugins/wp-piwik/](https://wordpress.org/plugins/wp-piwik/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [braekling](https://wordpress.org/support/users/braekling/)
 * (@braekling)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/php-notice-ob_start-constant/#post-5106011)
 * Ok, thank you very much. I will fix this 😉

Viewing 1 replies (of 1 total)

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 * 1 reply
 * 2 participants
 * Last reply from: [braekling](https://wordpress.org/support/users/braekling/)
 * Last activity: [11 years, 9 months ago](https://wordpress.org/support/topic/php-notice-ob_start-constant/#post-5106011)
 * Status: resolved