php web page does not display Chinese characters

In the process of web development, we often encounter the problem of being unable to display Chinese characters. Especially when using PHP for development, since PHP cannot automatically handle Chinese encoding issues, manual encoding conversion is often required. If correct configuration and processing are not performed, Chinese characters will not be displayed properly.

This article will share some common Chinese character display problems and solutions in PHP web pages, hoping to help readers better solve such problems.

1. Possible problems

1. garbled characters

On the web page, if Chinese characters are output directly, garbled characters may appear. This is because the web page uses UTF-8 encoding by default, while Chinese characters use GB2312 or GBK encoding. Therefore, Chinese characters need to be converted into UTF-8 encoding for normal display.

2. Box symbol

On web pages, sometimes a box symbol (�) appears instead of the Chinese characters that should be displayed. This situation is also caused by encoding conversion issues.

3. Chinese characters are truncated

On web pages, Chinese characters may be truncated, resulting in incomplete display. This is because Chinese characters occupy a larger character space than English characters. If the character length is not set correctly, truncation will occur.

2. Solution

1. Set character encoding

In PHP programs, setting character encoding is a very important step. You can use PHP's header() function to set the character encoding of the web page to UTF-8. The example is as follows:

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

2. Convert encoding format

If you want to output Chinese in the web page Characters, Chinese characters need to be encoded and converted. You can use PHP's iconv() function to convert Chinese characters from GBK or GB2312 encoding to UTF-8 encoding. An example is as follows:

$zh = "中文字符"; //要转换的中文字符
$utf = iconv('GBK', 'UTF-8', $zh); //将原始字符从GBK编码转换成UTF-8编码
echo $utf; //输出转换后的字符

3. Avoid string truncation

In PHP programs, when processing Chinese characters, you need to consider the problem that the character length they occupy is larger than that of English characters. . You can use the mb_substr() function for processing to ensure that string truncation does not occur. An example is as follows:

$str = "中文字符串";
$out = mb_substr($str,0,10,'utf-8'); //从字符串的第一个字符开始，截取10个字符的长度（以中文字符长度为准）
echo $out; //输出截取后的字符

4. Encoding settings for the database

If the PHP program uses a database, you need to pay attention to the encoding settings when connecting to the database. The character encoding of the database can be set in the connection properties. Examples are as follows:

$host = 'localhost';
$user = 'root';
$pass = '123456';
$db_name = 'test';
$dbh = new PDO("mysql:host=$host;dbname=$db_name;charset=utf8", $user, $pass);

The above are some common Chinese character display problems and solutions in PHP web pages. Hope it helps readers. In actual projects, it needs to be processed and configured according to specific circumstances to ensure that Chinese characters can be displayed normally.

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