How to solve php garbled code

Solution to php garbled code: 1. Confirm that the encoding format is consistent, use a text editor to open the PHP file, select the "Save As" function, and then select the appropriate encoding format to save; 2. Set the database character set, you can use "SET NAMES" statement to set the character set; 3. Output cache settings, by setting the cache control header at the head of the page to ensure that there will be no garbled code problems; 4. Transcoding function, which can be used to convert a string from one encoding to Another encoding; 5. Use HTML entity escaping, which can be processed using HTML entity escaping.

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP garbled problem is a challenge that developers often encounter. Garbled code problems can lead to a series of problems such as abnormal page display, database storage errors, and file download failures. This article will introduce several common methods to solve the problem of garbled characters in PHP to help developers effectively solve the problem of garbled characters.

1. Understand the cause of the garbled code problem

Before solving the garbled code problem, you first need to understand the cause of the garbled code problem. There are several main reasons:

1. Inconsistent character encoding: When the encoding format of the PHP file is inconsistent with the encoding format of the web page, it will lead to garbled characters.

2. Incorrect database character set setting: If the database character set setting is incorrect, garbled characters will appear when reading and storing data.

3. Output cache setting error: If the output cache setting is incorrect, it will also cause garbled code problems.

2. Solution

1. Confirm that the encoding format is consistent: First, make sure that the encoding format of the PHP file is consistent with the encoding format of the web page. Common encoding formats include UTF-8 and GBK. You can use a text editor to open the PHP file, select the "Save As" function, and then select the appropriate encoding format to save.

2. Set the database character set: Make sure the database character set is consistent with the web page character set. The character set can be set by modifying the database configuration file. For example, in MySQL, you can use "SET NAMES" statement to set the character set, for example:

$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_query($conn, "SET NAMES 'utf8'");

3. Output cache settings: You can set the cache control header at the head of the page to ensure that there will be no garbled characters. You can add the following code at the beginning of the PHP file :

header("Content-type: text/html; charset=utf-8");

4. Transcoding functions: PHP provides some transcoding functions that can be used to convert strings from one encoding to another. Common transcoding functions include iconv and mb_convert_encoding. For example, when converting a string from UTF-8 to GBK, you can use the following code:

$str = "乱码";
$str_gbk = iconv("utf-8", "gbk", $str);

5. Use HTML entity escaping: If the garbled text cannot be solved by the above method, you can use HTML entity escaping to deal with it. Special characters can be escaped using the "htmlspecialchars" function. For example:

$str = "";
$str_escaped = htmlspecialchars($str);

Summary:

PHP garbled problem is a problem that developers often encounter during the development process. By understanding the causes of the garbled code problem and taking corresponding solutions, the garbled code problem can be effectively solved. By ensuring that the file encoding format is consistent, setting the database character set, setting output cache control, using transcoding functions and HTML entity escaping, etc., you can avoid garbled code problems and ensure that web pages are displayed normally and data is stored correctly. .

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