Title: Fatal Error: Call to Undefined Function
Last modified: August 30, 2016

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# Fatal Error: Call to Undefined Function

 *  [Ryeboflaven](https://wordpress.org/support/users/ryeboflaven/)
 * (@ryeboflaven)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-75/)
 * I just updated your plugin and got the following error message after it said 
   it installed:
 * Fatal error: Call to undefined function date_diff() in /home/content/17/8138417/
   html/sale/wp-content/plugins/smart-manager-for-wp-e-commerce/smart-manager.php
   on line 294
 * I can’t open any of my tabs in the wp-admin panel, they all come up with this
   error message.
 * [https://wordpress.org/plugins/smart-manager-for-wp-e-commerce/](https://wordpress.org/plugins/smart-manager-for-wp-e-commerce/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [storeapps](https://wordpress.org/support/users/storeapps/)
 * (@storeapps)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-75/#post-6287302)
 * Hi Ryeboflaven,
 * Sorry for the inconvenience caused.
 * Would like to update you that in the recent release of Smart Manager we had included
   the PHP ‘date_diff()’ function and the same is available only from PHP 5.3 onwards.
 * So, looking at the error message provided by you, it seems that you are using
   a lower version of PHP on your server (i.e. > v5.3).
 * Further, request you to kindly have a check with your server administrator and
   if possible upgrade the PHP version to something greater than v5.3 and then have
   a recheck with Smart Manager functionality.
 * P.S. For any further queries or communication request you to kindly mail us the
   same at ‘support@storeapps.org’.

Viewing 1 replies (of 1 total)

The topic ‘Fatal Error: Call to Undefined Function’ is closed to new replies.

 * ![](https://ps.w.org/smart-manager-for-wp-e-commerce/assets/icon-256x256.png?
   rev=2356252)
 * [Smart Manager - Advanced WooCommerce Bulk Edit & Inventory Management](https://wordpress.org/plugins/smart-manager-for-wp-e-commerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/smart-manager-for-wp-e-commerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/smart-manager-for-wp-e-commerce/)
 * [Active Topics](https://wordpress.org/support/plugin/smart-manager-for-wp-e-commerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/smart-manager-for-wp-e-commerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/smart-manager-for-wp-e-commerce/reviews/)

## Tags

 * [undefined function](https://wordpress.org/support/topic-tag/undefined-function/)

 * 1 reply
 * 2 participants
 * Last reply from: [storeapps](https://wordpress.org/support/users/storeapps/)
 * Last activity: [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-75/#post-6287302)
 * Status: not resolved