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PHP is a scripting language commonly used for Web development. Its powerful functions and flexible features are favored by many people. In PHP, the shellexec function allows the program to execute system commands and return the results. However, when executing commands with Chinese characters, we often encounter the problem of Chinese garbled characters.
Chinese garbled characters are because PHP uses ASCII encoding, while Chinese in system commands uses GBK encoding, and the two encodings are incompatible. During the execution of the command, the system will convert the GBK-encoded Chinese into ASCII encoding, resulting in garbled characters.
To solve this problem, we need to use the iconv function to convert Chinese into a character set consistent with the system encoding, such as UTF-8.
The following is a code example of a solution:
$cmd = 'dir /B | findstr 中文'; // 一个带中文字符的命令
$cmd = iconv('UTF-8', 'GBK', $cmd); // 将命令中的中文转换成GBK编码
$result = shell_exec($cmd); // 执行命令
$result = iconv('GBK', 'UTF-8', $result); // 将命令的输出结果转换成UTF-8编码
echo $result; // 输出结果
In the above code, we first convert the Chinese characters in the command into GBK encoding, and convert the output of the command into UTF-8 Encoding to avoid Chinese garbled characters.
It should be noted that in order to ensure the security of the command, we should filter and escape the special characters in the command to avoid command injection and other security issues.
In short, the shellexec function in PHP can help us execute system commands, but when processing Chinese characters, we need to pay attention to the issue of encoding conversion. We can use the iconv function to convert Chinese characters into a character set consistent with the system encoding, thereby avoiding the occurrence of Chinese garbled characters.
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