Php mbstring extension установка

How to enable mbstring in PHP?

It is required to have PHP enabled with mbstring (multi-byte string) support for storing and displaying multi-byte characters in PHPKB software. The installation wizard of the multi-language editions of PHPKB knowledge base software will automatically detect if you have PHP enabled with mbstring support. If it is not enabled, you may get an error that says:

Please refer to the tutorial below on how to enable mbstring on your server.

Why mbstring is required?

When we manipulate (trim, split, splice, etc.) strings encoded in a multi-byte encoding, we need to use special functions since two or more consecutive bytes may represent a single character in such encoding schemes. Otherwise, if we apply a non-multibyte-aware string function to the string, it probably fails to detect the beginning or end of the multibyte character and ends up with a corrupted garbage string that most likely loses its original meaning.

So, mbstring provides multibyte-specific string functions that help us deal with multibyte encodings in PHP. In addition to that, mbstring handles character encoding conversion between the possible encoding pairs. mbstring is designed to handle Unicode-based encodings such as UTF-8 and UCS-2 and many single-byte encodings for convenience.

MBstring Installation

Please note that «mbstring» is a non-default PHP extension. This means it is not enabled by default.

Installation on Linux Server

You can find out if this module is installed or not by looking at the list that is produced by this command

If you don’t have this installed on a Linux machine and if you have installed PHP from yum then run this command as a superuser. The command depends on your operating system.

sudo yum install php-mbstring
This command is true for all Red Hat Linux-based distributions using RPM and the ’yum’ package manager; this includes RHEL, Fedora, CentOS, Mandriva, and Intrinsic Linux, among others.
For Debian, Ubuntu distributions, please use the following command.
sudo apt-get install php-mbstring

After that, you will need to restart your Apache service using the following command:

Installation on Windows Server

If you have access to the php.ini, just remove the semicolon character (;) in front of the line below.

Once you have made the changes, don’t forget to restart your web server for the change to take effect.

Note: PHP extensions are not just enabled from php.ini file. First, you need to install that specific extension, i.e. place its DLL file «php-mbstring.dll» into the «/php/ext/» directory if it is not already present there. When you do that, make sure you have the correct build of DLL file. 32-bit, thread-safe PHP binary, built using VC9 for example, would only work with DLL files built using exact same tools and configuration: 32-bit, using VC9, with thread-safety turned on. And of course PHP API version also needs to match. If it doesn’t, once you restart the web server, you will receive ’Error 500 — Server error’ message.

MBstring Configuration

Below is a sample excerpt from php.ini file which contains the configuration of mbstring variables.

[mbstring]
mbstring.language = all
mbstring.internal_encoding = UTF-8
mbstring.http_input = auto
mbstring.http_output = UTF-8
mbstring.encoding_translation = On
mbstring.detect_order = UTF-8
mbstring.substitute_character = none;
mbstring.func_overload = 0
mbstring.strict_encoding = Off

• Applicable To: Standard (Multi-Language) Edition, Enterprise Multi-Language Edition (MySQL), Enterprise Multi-Language Edition (SQL Server)

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How to install PHP `mbstring` extension in Ubuntu?

EDIT: Dylan Pierce has confirmed that you can already install some PHP 7.2 extensions in the same way you would for PHP 5. For mbstring in particular, you can execute:

sudo apt-get install php7.2-mbstring 

To complement sparkmood’s answer, this now works for PHP 7.2 if you already imported ondrej’s PPA for it.

sudo apt-get install libapache2-mod-php7.2 

Don’t forget, either PHP 7 is available through ubuntu’s official repositories or you will need an external PPA.

I’ve figured it out: sudo apt-get install php7.0-mbstring Also works for other php extensions you might need like: sudo apt-get install php7.0-zip sudo apt-get install php7.0-dom I really like how brainless it is to install/activate these modules. I just wish I didn’t have to go on an internet wide goose chase for them.

I believe that as soon as version 7 covers all of the old 5 libraries, you won’t have to write 7 to get the latest and greatest. Not doing so would probably break build scripts or cause unexpected behavior.

After installed in Ubuntu 16.04 with LAMP is needed to restart Apache2 service sudo service apache2 restart

sudo apt-get install php-mbstring 

I have installed mbstring in php7.0-fpm (7.0.15-0ubuntu0.16.04.4)

This is correct for Debian Stretch. No need to add the version number. Internally a sub-package with version number is loaded.

This is vastly superior to specifying the version on the cli as it seems to adapt to the installed version.

My experience using the sury package repo on debian 9 (stretch), I had to specify the 7.2 version, because php-mbstring is only supported until php 7.2. By not using the php prefix version, it kept saying it doesn’t exist since by php7.4 (the latest release of php as of today). Make sure to install only php7.2 and not above or it might not work as expected.

mbstring is built in libapache2-mod-php5 package, so you can use this command for installing :

sudo apt-get install libapache2-mod-php5 

 dba dom ereg exif fileinfo filter ftp gettext hash iconv json libxml mbstring mhash openssl pcre Phar posix Reflection session shmop SimpleXML soap sockets SPL standard sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter zip zlib. 

I have already installed apache2 on my server now if I install «libapache2-mod-php5» on my server will it any problem.

This is poor advice. While some systems have Apache2 installed, many others may not. Executing this command risks breaking otherwise working systems. (Yes, I know I’m years late, but maybe it’ll help someone not try this fix.)

If you’re using php 5.6

Install php 5.6 mbstring package:

sudo apt-get install php5.6-mbstring 

Then add the following line to the bottom of your php.ini file:

sudo service apache2 restart 

To find your php.ini file, create a file and insert the following line:

Then open with a browser to see where your php.ini file is located.

In my case it was already installed, but I just needed to do phpenmod mbstring , followed by apachectl graceful .

For Ubuntu 14.04 extension mbstring should be built in.

sudo apt-get install php7.0-mbstring 

It requires adding another source for apt for install in 18.04..

Download Page for php7.2-mbstring_7.2.7-0ubuntu0.18.04.2_amd64.deb on AMD64 machines

If you are running Ubuntu, it is strongly suggested to use a package manager like aptitude or synaptic to download and install packages, instead of doing so manually via this website.

You should be able to use any of the listed mirrors by adding a line to your /etc/apt/sources.list like this:

+1 I had to use this solution as well for my Google Cloud Ubuntu 18.04 LTS install before I could use apt-get for the 7.2 mbstring extension, then I was able to use the accepted answer.

Since the mcrypt itself (the package that php-mcrypt uses to do its crypt stuff) is no longer supported after PHP7.2, As of today, to install it specifically for php7.2, you’ll need to make sure when installing to prefix all php7.2 extensions with php7.2- .

While initially the commands suggested by others to just install it work, when using it with an framework version that requires mcrypt (such as Laravel4.2), it will require you to install mcrypt using pecl. Follow the fix here

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Quick ways to enable mbstring in php.ini

Usually, mbstring extension in web servers helps to manage the non-ASCII codes easily.

At Bobcares, we often get requests to enable mbstring extension, as a part of our Server Management Services.

Today, let’s see how our Support Engineers enable the mbstring extension for our customers.

How does mbstring error look?

Let’s begin by checking more details on mbstring and how the error appears on any website.

By default, mbstring makes multibyte encoding possible in PHP. This PHP extension helps in managing non-ASCII string. A typical example would be a website that handles musical quotes. It helps to manipulate strings encoded in a multi-byte encoding.

In many situations, customers get an error message related to missing PHP extensions. This particularly happens after enabling PHP function for wrong version of PHP. Or when the website uses an alternate PHP version.

For instance, while trying to enter phpMyAdmin and the mbstring module is missing on the server, it results in an error:

How we enable mbstring in php.ini?

Usually, adding the extension in the php.ini file enables mbstring. But, this procedure varies with different platforms.

With the expertise in Server Management, our Dedicated Engineers enable the mbsting module for our customers.

Let’s see the multiple ways that we use to enable mbstring on various platforms.

1. mbstring in Linux

Linux servers provide an easy way to enable PHP extensions.

Firstly, our Support Team check for the mbstring module using the command,

If there is no such module, then we install it using the command,

yum install php7x-mbstring

Afterward, we make sure the presence of necessary extension in the PHP include file. A sample entry looks like:

[root@xxx ~]# cat /etc/php.d/mbstring.ini ; Enable mbstring extension module extension=mbstring.so

Later we ensure to restart the webserver to save the changes. This enables PHP mbstring on the server. Finally, we verify the same by adding a web page that dispaly the results of the phpinfo() function.

2. In Windows

In the Windows server, the addition of the .dll files holds multiple codes and procedures. So, the Support Team first makes sure that the .dll file is present in the server.

Usually, php.ini is the file that contains all the PHP parameters. Thus, we access the php.ini file.

We check for the entry regarding the mbstring extension in the configuration file. We uncomment the line,

Later, we save the changes and restart the webserver.

3. Enabling mbstring in cPanel

In servers having a cPanel, it is easier to enable mbstring. So, for cPanel customers we enable mbstring as follows:

1. Firstly, we login to the cPanel account.
2. Next, we go to the Software section.
3. Here, we click the drop-down to Select the PHP version.
4. Now, select the PHP extension mbstring.
5. Finally, click the save button.

[Having difficulty in enabling PHP mbstring? – We will do it for you.]

Conclusion

In short, to manage non-ASCII strings, we enable mbstring in php.ini. Today, we saw how to enable mbstring on different server platforms. We also saw how our Support Engineers fix the mbstring error in phpMyAdmin.

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