Title: PHP 7 error
Last modified: May 3, 2017

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# PHP 7 error

 *  Resolved [Rodolfo Melogli](https://wordpress.org/support/users/businessbloomer/)
 * (@businessbloomer)
 * [9 years ago](https://wordpress.org/support/topic/php-7-error-9/)
 * Hi there!
 * I’m about to update my site to PHP 7.
 * However, I get this error:
 * FILE: /wp-content/plugins/woocommerce-pdf-invoices-packing-slips/lib/dompdf/include/
   page_cache.cls.php
    ————————————————————————————————————————————————— FOUND 0
   ERRORS AND 1 WARNING AFFECTING 1 LINE —————————————————————————————————————————————————
   40 | WARNING | Method name “Page_Cache::__query” is discouraged; PHP has reserved
   all method names with a double underscore prefix for future use —————————————————————————————————————————————————
 * Can you please provide a fix?
 * Thank you,
 * R

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

 *  [Firelight](https://wordpress.org/support/users/mdc2957/)
 * (@mdc2957)
 * [9 years ago](https://wordpress.org/support/topic/php-7-error-9/#post-9097896)
 * Plugin doesn’t work with PHP 7? I’m already on 7, and was considering using this
   plugin on my site…
 *  Plugin Contributor [Ewout](https://wordpress.org/support/users/pomegranate/)
 * (@pomegranate)
 * [9 years ago](https://wordpress.org/support/topic/php-7-error-9/#post-9108670)
 * Hi! No worries, the plugin is PHP7 compatible, this is just a warning that something
   might break in the future, but not an issue with the current PHP7 release. Many
   people are using this on PHP7 already without any issues. I’m working on a big
   update that will have a new version of the HTML to PDF conversion library too,
   which fixes this notice too.
 * TLDR; just ignore the error 🙂
 * Ewout

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

The topic ‘PHP 7 error’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-pdf-invoices-packing-slips/assets/icon-256x256.
   png?rev=2189942)
 * [PDF Invoices & Packing Slips for WooCommerce](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce-pdf-invoices-packing-slips/)
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## Tags

 * [PHP7](https://wordpress.org/support/topic-tag/php7/)

 * 2 replies
 * 3 participants
 * Last reply from: [Ewout](https://wordpress.org/support/users/pomegranate/)
 * Last activity: [9 years ago](https://wordpress.org/support/topic/php-7-error-9/#post-9108670)
 * Status: resolved