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HTTP Input and Output
HTTP input/output character encoding conversion may convert binary data also. Users are supposed to control character encoding conversion if binary data is used for HTTP input/output.
Note:
If enctype for HTML form is set to multipart/form-data and mbstring.encoding_translation is set to On in php.ini the POST'ed variables and the names of uploaded files will be converted to the internal character encoding as well. However, the conversion isn't applied to the query keys.
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HTTP Input
There is no way to control HTTP input character conversion from a PHP script. To disable HTTP input character conversion, it has to be done in php.ini.
Example #1 Disable HTTP input conversion in php.ini
;; Disable HTTP Input conversion mbstring.http_input = pass ;; Disable HTTP Input conversion mbstring.encoding_translation = Off
When using PHP as an Apache module, it is possible to override those settings in each Virtual Host directive in httpd.conf or per directory with .htaccess. Refer to the Configuration section and Apache Manual for details.
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HTTP Output
There are several ways to enable output character encoding conversion. One is using php.ini, another is using ob_start() with mb_output_handler() as the ob_start callback function.
Example #2 php.ini setting example
;; Enable output character encoding conversion for all PHP pages ;; Enable Output Buffering output_buffering = On ;; Set mb_output_handler to enable output conversion output_handler = mb_output_handler
Example #3 Script example
<?php
// Enable output character encoding conversion only for this page
// Set HTTP output character encoding to SJIS
mb_http_output('SJIS');
// Start buffering and specify "mb_output_handler" as
// callback function
ob_start('mb_output_handler');
?>
English translation
You have asked to visit this site in English. For now, only the interface is translated, but not all the content yet.If you want to help me in translations, your contribution is welcome. All you need to do is register on the site, and send me a message asking me to add you to the group of translators, which will give you the opportunity to translate the pages you want. A link at the bottom of each translated page indicates that you are the translator, and has a link to your profile.
Thank you in advance.
Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-mbstring.http.html
The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.
References
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The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.
