Composer Install - requires ext-mbstring

Question

I am trying to do a composer install ..., but getting an error of requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. I am using Apache (Cpanel) and PHP 5.6.

Below are the ways I am trying to fix the error.

1: yum search mbstring

============================================= N/S matched: mbstring =============================================
ea-php54-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
ea-php55-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
ea-php56-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
ea-php70-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
ea-php71-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
ea-php72-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
rh-php56-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
rh-php70-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling
rh-php71-php-mbstring.x86_64 : A module for PHP applications which need multi-byte string handling

2: yum install ea-php56-php-mbstring.x86_64

Loaded plugins: fastestmirror, universal-hooks
Loading mirror speeds from cached hostfile
 * EA4: 110.4.45.120
 * cpanel-addons-production-feed: 110.4.45.120
 * base: ftp.cuhk.edu.hk
 * centosplus: ftp.cuhk.edu.hk
 * epel: ftp.cuhk.edu.hk
 * extras: ftp.cuhk.edu.hk
 * ius: hkg.mirror.rackspace.com
 * updates: ftp.cuhk.edu.hk
Package ea-php56-php-mbstring-5.6.35-1.1.5.cpanel.x86_64 already installed and latest version
Nothing to do

It seems mbstring is installed but why I got an error when I try to composer install?

Another way (update PHP version in cPanel)

1: WHM - already set to 7.1

2: cPanel - already set to 7.1

but version in server still 5.6

Any suggestions to resolve require ext-mbstring error?

What does `php -m` yield? Is `mbstring` listed there? If not, you should enable that PHP extension — Nico Haase, Apr 23 '18 at 11:11
Possible duplicate of [Composer - the requested PHP extension mbstring is missing from your system](https://stackoverflow.com/questions/32488917/composer-the-requested-php-extension-mbstring-is-missing-from-your-system) — Nico Haase, Apr 23 '18 at 11:11
Solved. The package names are different. So, this post may be good to remind others to double check what they have in their server — Pak Ho Cheung, Apr 23 '18 at 12:50

rüff0 · Answer 1 · 2019-12-08T05:17:48.157

9

Try installing mbstring php library with aptitude.

sudo apt-get install php-mbstring php7.1-mbstring

edited Dec 08 '19 at 05:17

answered Jul 20 '18 at 16:38

rüff0

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Pak Ho Cheung · Accepted Answer · 2018-04-23T12:48:44.780

3

Installing rh can solve this issue yum install rh-php56-php-mbstring.x86_64

Please double check what you have in your server. Mine is rh-php56-php-mbstring.x86_64 not php-mbstring

edited Apr 23 '18 at 12:48

answered Apr 23 '18 at 10:21

Pak Ho Cheung

1,382
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score 2 · Answer 3 · answered Apr 23 '18 at 09:37

2

Use this command to install mbstrig

 yum install php-mbstring

Once installed restart apache

 service httpd restart

answered Apr 23 '18 at 09:37

Diogo Jesus

318
4
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```No package php-mbstring available.``` – Pak Ho Cheung Apr 23 '18 at 09:48
Restarting apache has no connection to Composer, as Composer does not use Apache – Nico Haase Apr 23 '18 at 11:10
composer doesn't need apache but the application itself needs apache. Then you must restart apache to enable the php extension – Diogo Jesus Apr 23 '18 at 11:20
But the question does not mention any application that is not working, but only the installation process which does not require a running apache process after all – Nico Haase Apr 23 '18 at 12:51
1

You guys must have some mental problems... Everytime you install an extension you MUST restart apache. Asked or not you must do it everytime. Now giving a negative note because of apache restart is just childish and non sense. – Diogo Jesus Apr 23 '18 at 13:01
1

What if I'm using NGinx? Still have to restart Apache? – Sven Apr 23 '18 at 20:31
1

The question says user is running apache. – Diogo Jesus Apr 23 '18 at 20:40

score 1 · Answer 4 · answered Dec 06 '20 at 21:26

I recently had a similar issue when trying to run a build for my PHP WordPress site. I ended up updating the composer.json with the snippet below in the require section:

# composer.json
# ...

"require": {
  "ext-mbstring": "*", # <-- I've added this
  "ext-gd": "*",
  "php": "7.*",
  "wordpress/wordpress": "*",

  # ...

}

Hopefully this can become useful to others in the future!

score 0 · Answer 5 · answered Jan 28 '19 at 13:30

0

If there are no deeper dependencies down the line, you could use a polyfill instead: edit the composer.json and replace the problem line with "symfony/polyfill-mbstring": "~1.0"

https://packagist.org/packages/symfony/polyfill-mbstring

answered Jan 28 '19 at 13:30

informatik-handwerk.de

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Composer Install - requires ext-mbstring

5 Answers5