Php Mbstring

Introduction: Mbstring stands for multi-bytes string functions that are used to manage non-ASCII strings. Mbstring stands for multi-byte string functions. Mbstring is used to convert strings to different encodings. Multibyte character encoding schemes are used to express more than 256 characters in the regular bytewise coding system.

Php-mbstring - A module for PHP applications which need multi-byte string handling The php-mbstring package contains a dynamic shared object that will add support for multi-byte string handling to PHP. How to enable the PHP Mbstring extension? Luckily, the majority of modern web hosting providers with cPanel let you manually enable that extension, and let your site works properly. All you have to do is to login into your cPanel account, then find the icon “Select PHP version”, “PHP Configuration”, or “PHP Settings”.

Prerequisites: I hope you already installed PHP so, you have PHP repository in your system if not please enable remi repository first.

Install mbstring

Configure mbstring

The default configuration file of mbstring present in /etc/php.ini modifies it according to your requirement using vim or vi editor. below is the sample

Restart Apache Server (httpd)

Verify mbstring Extension

For verifying we will create an info.php in /var/www/html/info.php

Save it and restart apache server (httpd) for reflecting changes

Now access this URL http://server_domain_name_or_IP/info.php in your browser

Conclusion:- Done, you’ve successfully installed and configured PHP mbstring extension in your system. If you’re facing any issue during installation and configuring it feel free to use our comment section for solutions.

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Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

mbstring configuration options
NameDefaultChangeableChangelog
mbstring.language'neutral'PHP_INI_ALL PHP_INI_PERDIR in PHP <= 5.2.6.
mbstring.detect_orderNULLPHP_INI_ALL
mbstring.http_input'pass'PHP_INI_ALLDeprecated in PHP 5.6.0.
mbstring.http_output'pass'PHP_INI_ALLDeprecated in PHP 5.6.0.
mbstring.internal_encodingNULLPHP_INI_ALLDeprecated in PHP 5.6.0.
mbstring.script_encodingNULLPHP_INI_ALLRemoved in PHP 5.4.0. Use zend.script_encoding instead.
mbstring.substitute_characterNULLPHP_INI_ALL
mbstring.func_overload'0'PHP_INI_SYSTEM PHP_INI_PERDIR in PHP <= 5.2.6. Deprecated in PHP 7.2.0.
mbstring.encoding_translation'0'PHP_INI_PERDIR
mbstring.http_output_conv_mimetypes'^(text/|application/xhtml+xml)'PHP_INI_ALLAvailable as of PHP 5.3.0.
mbstring.strict_detection'0'PHP_INI_ALLAvailable as of PHP 5.1.2.
For further details and definitions of thePHP_INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation ofthe configuration directives.

mbstring.languagestring

The default national language setting (NLS) used in mbstring. Note that this option automagically defines mbstring.internal_encoding and mbstring.internal_encoding should be placed after mbstring.language in php.ini

mbstring.encoding_translationbool

Enables the transparent character encoding filter for the incoming HTTP queries, which performs detection and conversion of the input encoding to the internal character encoding.

mbstring.internal_encodingstring
Warning

This feature has beenDEPRECATED as of PHP 5.6.0. Relying on this featureis highly discouraged.

Defines the default internal character encoding.

PHP 5.6 and later users should leave this empty and set default_charset instead.

mbstring.http_inputstring
Warning

This feature has beenDEPRECATED as of PHP 5.6.0. Relying on this featureis highly discouraged.

Defines the default HTTP input character encoding.

PHP 5.6 and later users should leave this empty and set default_charset instead.

mbstring.http_outputstring
Warning

Php Mbstring Replace

This feature has beenDEPRECATED as of PHP 5.6.0. Relying on this featureis highly discouraged.

Defines the default HTTP output character encoding (output will be converted from the internal encoding to the HTTP output encoding upon output).

PHP 5.6 and later users should leave this empty and set default_charset instead.

mbstring.detect_orderstring
Php mbstring install

Defines default character code detection order. See also mb_detect_order().

mbstring.substitute_characterstring

Defines character to substitute for invalid character encoding. See mb_substitute_character() for supported values.

mbstring.func_overloadstring
Warning

This feature has beenDEPRECATED as of PHP 7.2.0. Relying on this featureis highly discouraged.

Overloads a set of single byte functions by the mbstring counterparts. See Function overloading for more information.

Php Mbstring Extension Missing

This setting can only be changed from the php.ini file.

mbstring.http_output_conv_mimetypesstring

Enable Mbstring

mbstring.strict_detectionbool

Enables the strict encoding detection.

Php Mbstring Extension Ubuntu

According to the » HTML 4.01 specification, Web browsers are allowed to encode a form being submitted with a character encoding different from the one used for the page. See mb_http_input() to detect character encoding used by browsers.

Although popular browsers are capable of giving a reasonably accurate guess to the character encoding of a given HTML document, it would be better to set the charset parameter in the Content-Type HTTP header to the appropriate value by header() or default_charset ini setting.

Example #1 php.ini setting examples

Php Mbstring

Example #2 php.ini setting for EUC-JP users

Php Mbstring Install Ubuntu 18.04

Example #3 php.ini setting for SJIS users