Garbled characters after php submits ut8

PHP is a popular server-side scripting language used for building dynamic web pages and applications. It is very common to process UTF-8 character set data in PHP. However, sometimes you encounter the problem of garbled characters after UTF-8 character set data is submitted. This problem is a headache, so we need to know some solutions.

1. Set the character set of PHP

When processing data in the UTF-8 character set, you first need to ensure that the character set of PHP is correctly set to UTF-8. In PHP, you can use the header() function to set the character set, as shown below:

header('Content-Type:text/html;charset=utf-8');

When using this method, you need to set the UTF-8 character set as part of the document type, otherwise it will cause Garbled code problem.

2. Set PHP's default character set

You can set PHP's default character set in the PHP.ini file. In PHP.ini the following settings can be found:

default_charset = "utf-8"

By default the value should be utf-8, but if the value is set to another character set you will need to change it back to utf-8 .

3. Use the mb_convert_encoding() function

The mb_convert_encoding() function is a built-in function in PHP, used to convert the encoding format of a string. You can use this function to convert data in non-UTF-8 character sets to data in UTF-8 character sets. As shown below:

$utf8_string = mb_convert_encoding($string, 'UTF-8', '原编码格式');

Among them, $string is the original string, 'original encoding format' is the encoding format of the original string, and $utf8_string is the converted string.

4. Use the iconv() function

Theiconv() function is also a built-in function in PHP, used for string encoding conversion. It is similar to the mb_convert_encoding() function, but provides more options to control string conversion. As shown below:

$utf8_string = iconv('原编码格式', 'UTF-8', $string);

Among them, $string is the original string, 'original encoding format' is the encoding format of the original string, and $utf8_string is the converted string.

5. Modify the encoding in the HTML form

When the form is submitted to the PHP script, you need to ensure that the encoding format in the HTML form is correctly set to UTF-8. The following is an example:

<form method="post" action="submit.php" accept-charset="utf-8">
    <input type="text" name="name">
    <input type="submit" value="提交">
</form>

Here, we use the accept-charset attribute to specify that the encoding format of the form is UTF-8.

6. Set encoding in MySQL database

If the data is stored in a MySQL database, then you need to ensure that the character set used by the tables and fields in the database is UTF-8 . You can use the following statement to set the character set of tables and fields:

ALTER TABLE 表名 CONVERT TO CHARACTER SET utf8;
ALTER TABLE 表名 CHANGE 字段名 字段名 VARCHAR(200) CHARACTER SET utf8;

Among them, 'table name' is the name of the table that needs to be modified, and 'field name' is the name of the field that needs to be modified.

Summary

The above are some methods to solve the problem of garbled characters after PHP submits UTF-8. When dealing with UTF-8 character set data, it is important to ensure that the character set of PHP, HTML forms, and MySQL databases are all correctly set to UTF-8. At the same time, in PHP scripts, you can use functions such as mb_convert_encoding() and iconv() to convert data in non-UTF-8 character sets to data in UTF-8 character sets.

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