Title: Undefined function ctype_lower
Last modified: November 18, 2022

---

# Undefined function ctype_lower

 *  Resolved [markflaws](https://wordpress.org/support/users/markflaws/)
 * (@markflaws)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-function-ctype_lower-2/)
 * Hi. Any ideas how to resolve this error which occurs when trying to view campaigns
   or contacts?
 *     ```
       PHP Fatal error:  Uncaught Error: Call to undefined function FluentCrm\Framework\Support\ctype_lower() in /.../htdocs/wp/wp-content/plugins/fluent-crm/vendor/wpfluent/framework/src/WPFluent/Support/Str.php:402 
       Stack trace: 
       #0 /.../htdocs/wp/wp-content/plugins/fluent-crm/vendor/wpfluent/framework/src/WPFluent/Database/Orm/Model.php(3407): FluentCrm\Framework\Support\Str::snake('Settings')
       ```
   
 * WP and plugins are current. Thanks

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

 *  Plugin Author [Shahjahan Jewel](https://wordpress.org/support/users/techjewel/)
 * (@techjewel)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-function-ctype_lower-2/#post-16215069)
 * I think in your server ext/ctype PHP extension is missing. You have to install
   that on your server.
    Just contact your hosting provider to install that. Or 
   if you manage your own server then you follow this tutorial: [https://zoomadmin.com/HowToInstall/UbuntuPackage/php-ctype](https://zoomadmin.com/HowToInstall/UbuntuPackage/php-ctype)
 *  Thread Starter [markflaws](https://wordpress.org/support/users/markflaws/)
 * (@markflaws)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-function-ctype_lower-2/#post-16219582)
 * Thanks. That worked.

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

The topic ‘Undefined function ctype_lower’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [markflaws](https://wordpress.org/support/users/markflaws/)
 * Last activity: [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-function-ctype_lower-2/#post-16219582)
 * Status: resolved