Title: Php error: Undefined array key
Last modified: July 8, 2023

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# Php error: Undefined array key

 *  Resolved [pretorianswebmaster](https://wordpress.org/support/users/pretorianswebmaster/)
 * (@pretorianswebmaster)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/php-error-undefined-array-key/)
 * For some time the error
 *  “2090408#0: *109901 FastCGI sent in stderr: “PHP message: PHP Warning: Undefined
   array key “payment_parentId” in [/var/www/vhosts/pretorians.lu/httpdocs/wp-content/plugins/ameliabooking/src/Domain/Factory/Booking/Appointment/CustomerBookingFactory.php](https://plesk-euc1-g57.eurodns.host:8443/smb/file-manager/code-editor?currentDir=%2Fhttpdocs%2Fwp-content%2Fplugins%2Fameliabooking%2Fsrc%2FDomain%2FFactory%2FBooking%2FAppointment&subscriptionId=205&file=CustomerBookingFactory.php&redirect=%2Fsmb%2Flog-file%2Fbrowser%2Fid%2F205)
   on line 224PHP message: PHP Warning: Undefined array key “payment_parentId” in
   [/var/www/vhosts/pretorians.lu/httpdocs/wp-content/plugins/ameliabooking/src/Domain/Factory/Booking/Appointment/CustomerBookingFactory.php](https://plesk-euc1-g57.eurodns.host:8443/smb/file-manager/code-editor?currentDir=%2Fhttpdocs%2Fwp-content%2Fplugins%2Fameliabooking%2Fsrc%2FDomain%2FFactory%2FBooking%2FAppointment&subscriptionId=205&file=CustomerBookingFactory.php&redirect=%2Fsmb%2Flog-file%2Fbrowser%2Fid%2F205)
   on line 224″ while reading response header from upstream”
 * pops up ever so often.
 * I’m unsure what exactly triggers this error or how to fix it properly.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-error-undefined-array-key%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [ameliabooking](https://wordpress.org/support/users/ameliabooking/)
 * (@ameliabooking)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/php-error-undefined-array-key/#post-16883153)
 * Hello, thank you for reaching out to us.
 * Can you please let us know which version of the Amelia plugin you have installed
   on your website?
 *  Thread Starter [pretorianswebmaster](https://wordpress.org/support/users/pretorianswebmaster/)
 * (@pretorianswebmaster)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/php-error-undefined-array-key/#post-16883176)
 * Amelia 6.4
 *  Plugin Author [ameliabooking](https://wordpress.org/support/users/ameliabooking/)
 * (@ameliabooking)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/php-error-undefined-array-key/#post-16895036)
 * Hello, thank you for clearing that up.
 * Since you’re using the Premium version of the plugin, please open a ticket on
   our [official support platform](https://tmsplugins.ticksy.com/), and we’ll gladly
   help you there.
 * Commercial products are [not supported in these forums](https://wordpress.org/support/guidelines/#do-not-post-about-commercial-products).
 * Thank you for understanding.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Php error: Undefined array key’ is closed to new replies.

 * ![](https://ps.w.org/ameliabooking/assets/icon-256x256.png?rev=3429091)
 * [Booking for Appointments and Events Calendar - Amelia](https://wordpress.org/plugins/ameliabooking/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/ameliabooking/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/ameliabooking/)
 * [Active Topics](https://wordpress.org/support/plugin/ameliabooking/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/ameliabooking/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/ameliabooking/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [ameliabooking](https://wordpress.org/support/users/ameliabooking/)
 * Last activity: [2 years, 11 months ago](https://wordpress.org/support/topic/php-error-undefined-array-key/#post-16895036)
 * Status: resolved