How to use PHP to perform script operations under Linux

How to use PHP to perform script operations under Linux

In Linux systems, PHP is a very commonly used server-side scripting language. It can interact with the operating system and perform some system-level operations, such as executing commands, reading and writing files, etc. This article will introduce how to use PHP to perform script operations under Linux and provide specific code examples.

1. Execute command operations

1. Use the shell_exec function to execute the command

shell_execThe function can be executed System command and returns the output results. The following is a simple example:

<?php
$output = shell_exec('ls -l');
echo $output;
?>

The above code executes the ls -l command and assigns the output result to the variable $output, and finally passes The echo statement outputs the results.

2. Use the exec function to execute the command

exec function is similar to the shell_exec function and can also Execute system commands, but it can return the last line of output of the command. The following is an example:

<?php
exec('ls -l', $output);
foreach ($output as $line) {
    echo $line . "
";
}
?>

The above code also executes the ls -l command, but stores the output results in the array $output# through the exec function ##, and output line by line through the foreach loop.

2. Read and write file operations

Read file content

Please see the following sample code:

<?php
$file = '/path/to/file.txt';
$content = file_get_contents($file);
echo $content;
?>

The above code will The content of the file

/path/to/file.txt is read into the variable $content and output through the echo statement.

Write file content

The following is a sample code:

<?php
$file = '/path/to/file.txt';
$content = 'Hello, World!';
file_put_contents($file, $content);
?>

The above code will string

Hello, World! Write to file /path/to/file.txt.

3. Other operations

Get system environment variables

The system environment variables can be obtained through the

getenv function. The following is an example:

<?php
$home = getenv('HOME');
echo $home;
?>

The above code obtains the system's

HOME environment variable and outputs it through the echo statement.

Perform system-level operations

The following is a sample code:

<?php
// 创建目录
$dir = '/path/to/new/directory';
mkdir($dir, 0777);

// 复制文件
$source = '/path/to/source/file.txt';
$destination = '/path/to/destination/file.txt';
copy($source, $destination);

// 删除文件
$file = '/path/to/file.txt';
unlink($file);
?>

The above code demonstrates the operations of creating directories, copying files, and deleting files .

Summary

This article introduces how to use PHP to perform script operations under the Linux system, including executing commands, reading and writing files, and other operations. The above are some basic examples, you can expand and modify them according to your actual needs. Using PHP to perform script operations under Linux can help us better manage the server and improve work efficiency. Hope this article is helpful to you!

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