Title: PHP Error
Last modified: November 5, 2020

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# PHP Error

 *  Resolved [leveluplifecoaching](https://wordpress.org/support/users/leveluplifecoaching/)
 * (@leveluplifecoaching)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/php-error-431/)
 * Hi there,
 * I have been receiving the following warning in the PHP error log:
 * PHP Warning: session_start(): Cannot start session when headers already sent 
   in wp-content/plugins/salon-booking-system/salon.php on line 84
 * What does this mean and is it something to be concerned about?
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-error-431%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Dimitri Grassi](https://wordpress.org/support/users/wordpresschef/)
 * (@wordpresschef)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/php-error-431/#post-13623948)
 * Hi,
 * nothing to be concerned about, in the upcoming version will fix this.
 *  Thread Starter [leveluplifecoaching](https://wordpress.org/support/users/leveluplifecoaching/)
 * (@leveluplifecoaching)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/php-error-431/#post-13624751)
 * Thanks very much.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘PHP Error’ is closed to new replies.

 * ![](https://ps.w.org/salon-booking-system/assets/icon-256x256.gif?rev=3214950)
 * [Salon Booking System - Free Version](https://wordpress.org/plugins/salon-booking-system/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/salon-booking-system/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/salon-booking-system/)
 * [Active Topics](https://wordpress.org/support/plugin/salon-booking-system/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/salon-booking-system/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/salon-booking-system/reviews/)

## Tags

 * [PHP errors](https://wordpress.org/support/topic-tag/php-errors/)
 * [PHP Warning](https://wordpress.org/support/topic-tag/php-warning/)
 * [salonbooking](https://wordpress.org/support/topic-tag/salonbooking/)

 * 2 replies
 * 2 participants
 * Last reply from: [leveluplifecoaching](https://wordpress.org/support/users/leveluplifecoaching/)
 * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/php-error-431/#post-13624751)
 * Status: resolved