Detect if mbstring is enabled or not from PHP script

Question

How can I check if the mbstring extension is loaded in a php script?

Answer 1

Use if (extension_loaded('mbstring')) { /* loaded */ }

See PHP manual.

Answer 2

Also useful:

php -i | grep mbstring

Output:

/etc/php/8.1/cli/conf.d/20-mbstring.ini,
Zend Multibyte Support => provided by mbstring
Multibyte decoding support using mbstring => enabled
mbstring
mbstring extension makes use of "streamable kanji code filter and converter", which is distributed under the GNU Lesser General Public License version 2.1.
mbstring.detect_order => no value => no value
mbstring.encoding_translation => Off => Off
mbstring.http_input => no value => no value
mbstring.http_output => no value => no value
mbstring.http_output_conv_mimetypes => ^(text/|application/xhtml\+xml) => ^(text/|application/xhtml\+xml)
mbstring.internal_encoding => no value => no value
mbstring.language => neutral => neutral
mbstring.regex_retry_limit => 1000000 => 1000000
mbstring.regex_stack_limit => 100000 => 100000
mbstring.strict_detection => Off => Off
mbstring.substitute_character => no value => no value

Answer 3

From terminal/console, go in PHP CLI mode and echo the command as below,

$ php -a

php > echo extension_loaded('mbstring');
1

It will return 1 if mbstring is loaded as an extension otherwise null

Answer 4

Run this code in php file --

<?php phpinfo(); ?>

Answer 5

Use the extension_loaded class:

extension_loaded('mbstring');

Answer 6

You can check it through phpinfo().

Search for the string "mbstring" in phpinfo page. If it is present means then mbstring is enabled or it is disabled.

Answer 7

if you cannot find mbstring in phpinfo();    
change extension_dir = "ext" to  extension_dir = "c:/php/ext" 
in c:\php\php.ini file