Title: Undefined function mb_language()
Last modified: August 30, 2016

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# Undefined function mb_language()

 *  Resolved [mickyharris](https://wordpress.org/support/users/mickyharris/)
 * (@mickyharris)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/)
 * Hi,
 * When running search and register, I am getting the following error:
 * Fatal error: Call to undefined function mb_language() in /var/www/html/wp-content/
   plugins/media-from-ftp/req/MediaFromFtpAdmin.php on line 623
 * WP 4.4 PHP 5.3.29
 * Hope you can help
 * [https://wordpress.org/plugins/media-from-ftp/](https://wordpress.org/plugins/media-from-ftp/)

Viewing 7 replies - 1 through 7 (of 7 total)

 *  Thread Starter [mickyharris](https://wordpress.org/support/users/mickyharris/)
 * (@mickyharris)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857745)
 * OK, this is a host issue. The PHP mbstring library needs to be installed/enabled
   in php.ini
 *  [cexpert](https://wordpress.org/support/users/cexpert/)
 * (@cexpert)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857982)
 * PHP mbstring library is installed but I still get that same error.
    Kernel Version
   2.6.32-431.20.5.el6.x86_64 Apache Version 2.2.27 PHP Version 5.4.34 Wordpress
   4.4.1 Media from FTP 9.03
 *  Thread Starter [mickyharris](https://wordpress.org/support/users/mickyharris/)
 * (@mickyharris)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857983)
 * Maybe PHP needs restarting If the library has been recently installed.
 *  [cexpert](https://wordpress.org/support/users/cexpert/)
 * (@cexpert)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857985)
 * I rebooted the server but it did not help.
    phpinfo() is showing –enable-mbstring
   Zend Multibyte Support provided by mbstring Multibyte Support enabled Multibyte
   string engine libmbfl HTTP input encoding translation enabled libmbfl version
   1.3.2 mbstring.detect_order NULL NULL mbstring.encoding_translation On On mbstring.
   func_overload 0 0 mbstring.http_input no value no value mbstring.http_output 
   no value no value mbstring.http_output_conv_mimetypes ^(text/|application/xhtml\
   +xml) ^(text/|application/xhtml\+xml) mbstring.internal_encoding no value no 
   value mbstring.language neutral neutral mbstring.strict_detection Off Off mbstring.
   substitute_character no value no value
 * Thank you for providing any clue on this.
 * Regards,
    Claude
 *  Plugin Author [Katsushi Kawamori](https://wordpress.org/support/users/katsushi-kawamori/)
 * (@katsushi-kawamori)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857986)
 * Hi,
 * I am writing now. It is the code that run even without Multibyte String Functions.
   
   Multibyte String Functions is required to use the Multibyte String in the file
   name as Japanese. Some countries people do not need as. Do not participate in
   testing of this code? If you want to participate, please send an email to my 
   Email(in mediafromftp.php).
 *  [cexpert](https://wordpress.org/support/users/cexpert/)
 * (@cexpert)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857987)
 * Hi,
    Silly me, I think the message that was bugging me was in fact the first 
   item of the FAQ that would show open whenever I click on the FTP to media menu
   item which says “‘Fatal error: Call to undefined function mb_language() **’ get
   an error message. * The PHP mbstring library needs to be installed/enabled in
   php.ini.” and gave me the impression that it was hapenning. The feeling of problem
   was increased by the fact that the plugin would seems to spin for ever when I
   click on “search and register”. We have over 15K image files and the plugin seems
   to instist on counting them all before allowing us to restrict the scope of operation.
 * Kind regards,
    Claude
 *  Plugin Author [Katsushi Kawamori](https://wordpress.org/support/users/katsushi-kawamori/)
 * (@katsushi-kawamori)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857988)
 * Hi Claude,
 * Please write more simple. I do not understood.

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘Undefined function mb_language()’ is closed to new replies.

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## Tags

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

 * 7 replies
 * 3 participants
 * Last reply from: [Katsushi Kawamori](https://wordpress.org/support/users/katsushi-kawamori/)
 * Last activity: [10 years, 4 months ago](https://wordpress.org/support/topic/undefined-function-mb_language/#post-6857988)
 * Status: resolved