Title: Warning: preg_replace(): Empty regular expression…
Last modified: August 18, 2016

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# Warning: preg_replace(): Empty regular expression…

 *  [logicalharmony](https://wordpress.org/support/users/logicalharmony/)
 * (@logicalharmony)
 * [18 years, 10 months ago](https://wordpress.org/support/topic/warning-preg_replace-empty-regular-expression/)
 * After upgrading to the new version of WordPress (2.2.1), I am having a very confusing
   issue with my blog. The title of the blogs shows up, as do the lines underneath
   the blog, however, instead of posting each entry, the following is repeated over
   and over in place of each entry:
 * Warning: preg_replace(): Empty regular expression in /home/logical/public_html/
   wp-includes/formatting.php on line 654
 * I’m sure that this is probably a very simple problem, but I’m not familiar enough
   with the scripting part of WordPress to know what I need to do to fix it. Any
   suggestions or help would be greatly appreciated!!
 * Thanks!

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

 *  [ccoupe](https://wordpress.org/support/users/ccoupe/)
 * (@ccoupe)
 * [18 years, 10 months ago](https://wordpress.org/support/topic/warning-preg_replace-empty-regular-expression/#post-596806)
 * Verify that php and mysql meet the version requirements of WP 2.2.1, if not you
   have an issue with your web host.
 * Turn off any plugs-ins and use the default theme until it’s sorted out.
 *  [jazbek](https://wordpress.org/support/users/jazbek/)
 * (@jazbek)
 * [18 years, 7 months ago](https://wordpress.org/support/topic/warning-preg_replace-empty-regular-expression/#post-597110)
 * Hi, I’m having this exact problem, using WPMU 1.2.5, which is (I believe), the
   same as WP 2.2. Did you ever get it solved?

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

The topic ‘Warning: preg_replace(): Empty regular expression…’ is closed to new 
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## Tags

 * [formatting.php](https://wordpress.org/support/topic-tag/formatting-php/)
 * [preg_replace](https://wordpress.org/support/topic-tag/preg_replace/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 3 participants
 * Last reply from: [jazbek](https://wordpress.org/support/users/jazbek/)
 * Last activity: [18 years, 7 months ago](https://wordpress.org/support/topic/warning-preg_replace-empty-regular-expression/#post-597110)
 * Status: not resolved

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