How to solve the problem of garbled characters on PHP sites running on IIS7.5

PHP is a very popular web programming language and one of the powerful tools for building web applications. However, you may encounter some problems when using PHP to write Chinese web pages, such as garbled characters on PHP sites running on IIS 7.5. This article will explore the root cause of this problem and explain how to solve it.

Root Analysis

The root cause of garbled characters when running a PHP site on IIS 7.5 usually lies in the processing of character encoding. When PHP is run on a Windows server, the character encoding it uses by default is Windows-1252, not UTF-8 or other commonly used character encodings. Therefore, when using Chinese characters in PHP code, these characters may not be displayed correctly. This is the so-called garbled problem.

Solution

Before solving the problem of garbled characters, let us first understand what character encoding is. Character encoding is a way of mapping characters to numerical encodings so that computers can process text correctly. Unicode is a universal character encoding that supports almost all languages ​​and alphabets. UTF-8 is an implementation of Unicode that supports variable-length encoding and can process characters more efficiently. It is a very good practice to use UTF-8 to store and display Chinese text.

Now, let’s take a look at how to solve the garbled problem on a PHP site running on IIS 7.5.

1. Modify the PHP configuration file

To solve the garbled problem, we need to change the default character set in the PHP configuration file from Windows-1252 to UTF-8. Here are the steps on how to do it:

• Step 1: Open the php.ini file. On IIS 7.5, the php.ini file is usually located in the "C:\Program Files (x86)\PHP\php.ini" directory.

• Step 2: Find the "default_charset" option. If you don't find that option, you can add the following line to the end of the file:

default_charset = "UTF-8"

• Step 3: Save the file and close it.

2. Set response header

If we have correctly configured PHP to use UTF-8 character encoding, but still cannot display Chinese correctly characters, you may need to set response headers. Here are the steps on how to do it:

• Step 1: Add the following code at the top of your PHP code:

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

• Step 2: Save the file and reload the web page.

Summary

When using PHP to write Chinese web pages, one of the common problems is that Chinese characters cannot be displayed correctly. This is usually caused by incorrect character encoding. When garbled characters occur in a PHP site running on IIS 7.5, we can solve this problem by modifying the PHP configuration file and setting response headers. These methods may seem simple but are still a challenge for many PHP developers. So, we hope this article will help you solve this problem.

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