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> Mbstring: Call To Undefined Function Mb_internal_encoding, message "Call to undefined function" mb_strpos in Joomla 2.5
Web Design Seo
post Nov 1 2012, 08:13 AM
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User question:

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I get message:
Fatal error: Call to undefined function mb_internal_encoding() in <b>/home/public_html/components/com_something/controller.php on line ...


or:
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Fatal error: Call to undefined function mb_strpos() in/home/mypath/public_html/administrator/components/ ... on line ...


or:
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Fatal error: Call to undefined function mb_strpos() in/home/mypath/public_html/components/ ... on line ...



If you get some of these messages:
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Fatal error: Call to undefined function mb_regex_encoding()

or
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Fatal error: Call to undefined function mb_substr()

or
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Fatal error: Call to undefined function mb_internal_encoding()
or "Error 500"


The answer and the solution: You are probably on some custom server or vps server without mbstring extension of php installed. One of requirements of most of our components is mbstring extension of php to work multybite functions. This requirement come not from us, this is joomla 2.5 requirement.

So, you will say "why my joomla site work without mbstring" if this is joomla 2.5 requirement?

Joomla 2.5 can work without mbstring but will not work well and only with singlebyte characters like latin characters (for example english). If you have some joomla 2.5 website and site is with other than latin characters (for example with cyrillic or with chinese characters) and you have activated unicode aliases (unicode urls), you will see many errors in all website, include errors from joomla core. All online spinners, text rewriting tools, aggregators and other extensions that support utf-8 and other than english languages, require this function to work with multybite strings.

You can see the Install section for the mbstring extension, of which this function is part here: http://php.net/mbstring


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