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In PHP, handling multibyte character encoding is a common requirement, especially when we need to deal with languages such as Chinese, Japanese, Korean and other languages. PHP provides mbstring extension (multi-byte string extension), which provides PHP with the ability to process multi-byte characters. The mb_get_info function is one of the tools used to obtain multibyte encoding related information.
The mb_get_info function is used to obtain the configuration and status information of the mbstring extension. By calling this function, developers can view the settings, encoding types and other multibyte character processing information of the current mbstring extension. It is very helpful for debugging, configuring and optimizing multibyte character processing.
The function has no parameters, and when called, it returns the details of the current mbstring configuration.
<?php
// Get mbstring Configuration information
$info = mb_get_info();
print_r($info);
?>
After executing this code, the returned result will be an array containing the mbstring configuration, including the currently used encoding method, memory usage, character set, etc.
The array returned by mb_get_info contains the following information:
internal_encoding : The internal character encoding currently used.
http_input : HTTP input character encoding.
http_output : HTTP output character encoding.
mbstring.language : Current language settings.
mbstring.encoding_translation : Enable state of encoding conversion.
mbstring.detect_order : character encoding detection order.
mbstring.substitute_character : Character used to replace invalid characters.
For example, the following code will return the current multibyte encoding setting:
<?php
// Get当前 mbstring Coding settings
$info = mb_get_info();
echo "Internal encoding: " . $info['internal_encoding'] . "\n";
echo "HTTP Enter the encoding: " . $info['http_input'] . "\n";
echo "HTTP Output encoding: " . $info['http_output'] . "\n";
?>
When you are dealing with multibyte strings, you may encounter inconsistent encoding or abnormal character display. At this time, the mb_get_info function can help you quickly check whether the encoding settings are correct.
For example, suppose you encounter garbled code problems when dealing with a string containing Chinese characters. You can use mb_get_info to see if the current internal_encoding is set to UTF-8 , which is usually the key to solving the garbled problem.
<?php
// Get mbstring Configuration
$info = mb_get_info();
// 如果Internal encoding不是 UTF-8，Try setting to UTF-8
if ($info['internal_encoding'] !== 'UTF-8') {
mb_internal_encoding('UTF-8');
echo "已将Internal encoding设置为 UTF-8\n";
}
?>
mb_get_info requires support for the mbstring extension, so make sure that the extension is installed and enabled in your PHP environment.
mb_get_info does not support receiving parameters, so it always returns the current configuration status instead of the details of a specific encoding.
