What should I do if php code displays garbled characters?

PHP is a very popular server-side scripting language. Its emergence makes web development more convenient and faster. But sometimes you will find that the PHP code you wrote is garbled when displayed on the page, which is most likely caused by character encoding.

So, if the code written in PHP is garbled, what should we do?

First of all, we need to understand some basic concepts:

1. Character set

Character set refers to the general name of a character set, such as UTF-8, GB2312 etc. Each character set contains a number of characters, and these characters correspond to one or more binary digits. Different character sets use different ways to store these numbers, so they also have different encoding methods.

2. Encoding

Encoding refers to the process of representing characters in a character set as binary numbers. There are many character encodings, among which the more common ones are ASCII, GBK, UTF-8, etc.

3. BOM

BOM stands for Byte Order Mark, which is the byte order mark. It is a special character used to indicate the encoding method and usually appears at the beginning of a text file.

After understanding these basic concepts, we can deal with the garbled code according to the specific situation.

Solution 1: Set the character set and encoding method

First, we need to set the character set and encoding method at the beginning of the PHP file to tell the browser how to read and Show our page. Generally, we can use the following code:

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

In this code, we set it through the header function. Among them, Content-type specifies that the output content type is text/html, and charset specifies that the character set is utf-8. In this way, our page can be output in UTF-8 encoding.

If your page contains characters of other encoding methods, you can change the parameter value of charset to the corresponding encoding method, such as GBK, GB2312, etc.

Solution 2: Convert character set and encoding method

If our PHP file contains some garbled characters, we can convert these characters so that they match the characters we specified Set and encoding match.

For example, we can use PHP's own mb_convert_encoding function to perform conversion, as shown below:

$original_str = "这是一个乱码的字符串";
$new_str = mb_convert_encoding($original_str, "UTF-8", "GBK");
echo $new_str;

In the above code, we first define a variable $original_str that contains a garbled string, Then use the mb_convert_encoding function to perform the conversion. The first parameter represents the string to be converted to encoding, the second parameter represents the encoding method to be converted to, and the third parameter represents the original encoding method.

Finally, we output the converted string through the echo statement, so that the correct text can be displayed on the page.

Solution 3: Remove BOM

If BOM is added to our PHP file when saving, it will also cause garbled characters in the page. The solution is relatively simple, just save the file in a BOM-free format. The specific operation method is as follows:

Open the PHP file in Notepad, and then select Save As. In the save dialog box, find the encoding option, and then change the encoding method to UTF-8 without BOM format.

To sum up, if your PHP code is garbled, you can use the above three methods to deal with it according to the specific situation. I believe that as long as you follow these methods, you will be able to solve the garbled code problem and make your PHP program run normally.

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