Title: PHP error: headers already sent
Last modified: April 4, 2018

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# PHP error: headers already sent

 *  [inspired888](https://wordpress.org/support/users/inspired888/)
 * (@inspired888)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/php-error-headers-already-sent-3/)
 * Hi there,
    I’ve noticed in the error logs the following PHP error. It occurs 
   during checkout (quote request).
 * Site uses php v7.1.15
 * `2018/04/04 17:06:08 [error] 18244#18244: *146 FastCGI sent in stderr: "PHP message:
   PHP Warning: Cannot modify header information - headers already sent by (output
   started at /home/SANITISED/sites/SANITISED.com.au/public/wp-content/plugins/woo-
   invoices/woo-invoices.php:413) in /home/SANITISED/sites/SANITISED.com.au/public/
   wp-includes/pluggable.php on line 1216" while reading upstream, client: 125.236.177.225,
   server: www.SANITISED.com.au, request: "POST /quote-invoice-request/ HTTP/2.0",
   upstream: "fastcgi://unix:/run/php/php7.1-fpm.sock:", host: "www.SANITISED.com.
   au", referrer: "https://www.SANITISED.com.au/quote-invoice-request/"`
 * Any suggestions?
 * Thanks,
    Jonathan

Viewing 1 replies (of 1 total)

 *  Plugin Author [SlicedInvoices](https://wordpress.org/support/users/slicedinvoices/)
 * (@slicedinvoices)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/php-error-headers-already-sent-3/#post-10195883)
 * Hi Jonathan,
 * I just saw your post here. I know we already talked over on the Sliced Invoices
   support threads… were you still having trouble or is this issue already resolved?

Viewing 1 replies (of 1 total)

The topic ‘PHP error: headers already sent’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/woo-invoices_7a828c.svg)
 * [Woo Invoices - Quotes and Invoices](https://wordpress.org/plugins/woo-invoices/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woo-invoices/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woo-invoices/)
 * [Active Topics](https://wordpress.org/support/plugin/woo-invoices/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woo-invoices/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woo-invoices/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [SlicedInvoices](https://wordpress.org/support/users/slicedinvoices/)
 * Last activity: [8 years, 1 month ago](https://wordpress.org/support/topic/php-error-headers-already-sent-3/#post-10195883)
 * Status: not resolved