Title: Warning: preg_replace() [function.preg-replace]: Unknown modifier 'p'
Last modified: August 24, 2016

---

# Warning: preg_replace() [function.preg-replace]: Unknown modifier 'p'

 *  Resolved [loggins](https://wordpress.org/support/users/loggins/)
 * (@loggins)
 * [11 years ago](https://wordpress.org/support/topic/warning-preg_replace-functionpreg-replace-unknown-modifier-p/)
 * I’ve been using the plug for several months and now I’m receiving the error below.
   I have not updated or installed any plugins. My only assumption is that the plugin
   isn’t compatible with WordPress 4.2.2
 * Warning: preg_replace() [function.preg-replace]: Unknown modifier ‘p’ in /home/
   backsta/public_html/newmusicweekly.com/wp-content/plugins/add-meta-tags/amt-utils.
   php on line 130
 * [https://wordpress.org/plugins/add-meta-tags/](https://wordpress.org/plugins/add-meta-tags/)

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

 *  Plugin Author [George Notaras](https://wordpress.org/support/users/gnotaras/)
 * (@gnotaras)
 * [11 years ago](https://wordpress.org/support/topic/warning-preg_replace-functionpreg-replace-unknown-modifier-p/#post-6123672)
 * Hello,
 * I have replied to your email but never heard back.
 * George
 *  Plugin Author [George Notaras](https://wordpress.org/support/users/gnotaras/)
 * (@gnotaras)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/warning-preg_replace-functionpreg-replace-unknown-modifier-p/#post-6123753)
 * Update: v2.8.4 will contain some changes that should eliminate this issue, regardless
   of its cause.

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

The topic ‘Warning: preg_replace() [function.preg-replace]: Unknown modifier 'p'’
is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/add-meta-tags.svg)
 * [Add Meta Tags](https://wordpress.org/plugins/add-meta-tags/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/add-meta-tags/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/add-meta-tags/)
 * [Active Topics](https://wordpress.org/support/plugin/add-meta-tags/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/add-meta-tags/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/add-meta-tags/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [George Notaras](https://wordpress.org/support/users/gnotaras/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/warning-preg_replace-functionpreg-replace-unknown-modifier-p/#post-6123753)
 * Status: resolved