Composer - the requested PHP extension mbstring is missing from your system

Question

I've recently tried to install package through Composer, but I have got an error the requested PHP extension mbstring is missing from your system. I removed semicolon from php.ini, but it still doesn't work. What should I do?

@joci, see [this answer](http://stackoverflow.com/a/18849044/1252947). — Pedro Pinheiro, Sep 09 '15 at 20:52
What OS are you using (linux/mac/windows)? What webserver are you using (iis/nginx/apache/etc)? Have you restarted the webserver software since updating the php.ini file? — Jonathan Kuhn, Sep 09 '15 at 20:56
I'm using Windows with apache server(MAMP). Yes, I restarted server. — Jozef Cipa, Sep 10 '15 at 05:44
It has own settings in php.ini ? I thought of just uncomment extension. If it has own settings I look at it. — Jozef Cipa, Sep 10 '15 at 15:23
@joci If you found the answer as a solution to your problem, please mark it as the answer. — notANerdDev, Dec 10 '15 at 17:59

score 252 · Answer 1 · edited Aug 17 '21 at 14:58

252

sudo apt-get install php-mbstring

# if your are using php 7.1
sudo apt-get install php7.1-mbstring

# if your are using php 7.2
sudo apt-get install php7.2-mbstring

# if your are using php 7.4
sudo apt-get install php7.4-mbstring

edited Aug 17 '21 at 14:58

steven

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answered May 20 '16 at 04:24

Pranay Aryal

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This worked but I had to install the specific php version: `sudo apt-get install php5.6-mbstring`. Do a search with `apt-cache search mbstring` to see which versions are available for your system. – Bjorn Aug 02 '16 at 00:51
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also `apt-get install php7.1-mbstring` works for me – Danon Feb 16 '17 at 15:07
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If running this returns an error of `Unable to locate package php-mbstring`, try running `sudo apt-get update` first. – matt Jan 31 '18 at 19:31
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And of course, `apt-get install php7.2-mbstring` – MikeBird Feb 08 '18 at 03:23
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confirmed working (sudo apt-get install php7.2-mbstring) on ubuntu php 7.2.24 – dataviews Dec 16 '19 at 12:10

score 22 · Answer 2 · answered Sep 10 '15 at 11:00

22

find your php.ini
make sure the directive extension_dir=C:\path\to\server\php\ext is set and adjust the path (set your PHP extension dir)
make sure the directive extension=php_mbstring.dll is set (uncommented)

If this doesn't work and the php_mbstring.dll file is missing, then the PHP installation of this stack is simply broken.

answered Sep 10 '15 at 11:00

Jens A. Koch

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I reinstalled server, but nothing has changed. – Jozef Cipa Sep 10 '15 at 14:09
That's odd. Maybe ask for support over at MAMP or simply switch the stack.. XAMPP, WPN-XM. – Jens A. Koch Sep 10 '15 at 14:16
I finally solved it. I set PHPRC variable and uncommented zend_extension=php_opcache.dll in php.ini. – Jozef Cipa Sep 14 '15 at 11:27
And also I installed C++ redistributable and directx. I don't know where was a problem, but it works perfect now. – Jozef Cipa Sep 14 '15 at 11:37
In my case there was no line for the extension php_mbstring in php.ini file. So I installed it using sudo apt-get install php7.3-mbstring. My php version is 7.3 and it worked like charm. – astrosixer Dec 16 '19 at 19:13

score 8 · Answer 3 · answered Mar 03 '18 at 19:55

8

For php 7.1

sudo apt-get install php7.1-mbstring

Cheers!

answered Mar 03 '18 at 19:55

Michel

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this do not work for me, which repo are you using? – klys Jul 07 '18 at 06:12
On Ubuntu 18 it worked as above. – david Apr 07 '20 at 16:56

score -1 · Accepted Answer · edited Dec 10 '15 at 22:03

-1

I set the PHPRC variable and uncommented zend_extension=php_opcache.dll in php.ini and all works well.

edited Dec 10 '15 at 22:03

cchapman

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answered Dec 10 '15 at 20:57

Jozef Cipa

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Can you explain better what you did please? – klys Jul 07 '18 at 06:31

Composer - the requested PHP extension mbstring is missing from your system

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