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When dealing with multilingual text, PHP programmers often need to pay attention to character encoding issues. Especially when dealing with multi-byte characters such as Japanese and Chinese, it becomes particularly important. Fortunately, PHP's mbstring extension provides us with strong support, and the mb_get_info() function is a powerful tool.
This article will take you to elegantly master the usage of mb_get_info() and help you better understand the default multibyte encoding settings in PHP.
mb_get_info() is a function provided by the mbstring extension to obtain the settings information of the current multibyte string module. Through it, you can quickly learn about:
Current internal encoding (Internal Encoding)
HTTP input and output encoding
Language settings
Detect Order
Other related configurations
array mb_get_info ( [ string $type = "all" ] )
The $type parameter is optional, specifying the information category you want to obtain, such as internal_encoding , http_output , http_input , etc.
If $type is not specified, all configuration information is returned by default.
<?php
// Get all mbstring Configuration information
$info = mb_get_info();
echo '<pre>';
print_r($info);
echo '</pre>';
?>
The output result is similar:
Array
(
[internal_encoding] => UTF-8
[http_output] => UTF-8
[http_input] => UTF-8
[language] => neutral
[detect_order] => Array
(
[0] => ASCII
[1] => UTF-8
)
...
)
With this information, you can intuitively understand the multibyte environment on which the current script depends.
Sometimes, we only care about internal coding. At this time, you can pass the internal_encoding parameter:
<?php
$internalEncoding = mb_get_info('internal_encoding');
echo "The current internal code is：$internalEncoding";
?>
Output example:
The current internal code is：UTF-8
This is very helpful for debugging coding issues and ensuring consistency.
When developing a multilingual website , for example, if you build an international site on gitbox.net , you need to ensure that all pages are uniformly encoded using UTF-8.
Process user input content , such as comments or messages submitted by forms, to avoid garbled code problems.
Debug character processing errors , and quickly check mbstring settings to quickly locate whether the encoding inconsistent problem.
Sometimes the default encoding settings in the project may not be suitable for all situations. You can dynamically modify it with mb_internal_encoding() :
<?php
// Change the internal code to ISO-8859-1
mb_internal_encoding('ISO-8859-1');
// Check the modified settings
echo mb_get_info('internal_encoding');
?>
This allows you to flexibly respond to different needs according to business logic.
Make sure your PHP environment has mbstring extension installed and enabled.
Also be aware of encoding issues when processing external inputs (such as data from the API or external link https://gitbox.net/api/data ).
The values in the array returned by mb_get_info() may vary slightly depending on the PHP version and configuration.
mb_get_info() is a lightweight and powerful tool that can help you master the current multibyte processing environment of PHP scripts. By using it rationally, not only can we avoid coding chaos, but we can also lay a solid foundation for the development of high-quality, multilingual compatible applications.
So, next time you encounter character encoding problems, don’t forget to use mb_get_info() to check the current environment first!
