Question

基本上，我想在本地运行以下脚本，以便开始停止重启并获取服务状态。它必须显示每个命令按钮的输出。我使用php 5.6来运行此代码。

以下是代码：

<?php
    // define cmds
    $commands = [
    'stop_apache' => [
        'description' => 'Stop Apache2',
        'cmd' => 'systemctl stop apache2'
    ],
    'restart_apache' => [
        'description' => 'Restart Apache2',
        'cmd' => 'systemctl restart apache2'
    ],
    'start_apache' => [
        'description' => 'Start Apache2',
        'cmd' => 'systemctl start apache2'
    ],
    'status_apache' => [
        'description' => 'Status Apache2',
        'cmd' => 'systemctl status apache2'
    ],
    ];

    // handle post
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $error = [];
    $result = '';

    // validate input
    if (empty($_POST['service'])) {
        $error = [
            'service' => 'Service type required!'    
        ];
    } elseif (!array_key_exists($_POST['service'], $commands)) {
        $error = [
            'service' => 'Invalid Service!'    
        ];
    }
    }
    ?>
    <form action="" method="post">
    <?php if (!empty($error)): ?>
    <h3>Error</h3>
    <pre><?= print_r($error, true) ?></pre>
    <?php endif ?>
    <?php foreach ($commands as $key => $command): ?>
    <button type="submit" name="service" value="<?= $key ?>"><?= 
    $command['description'] ?></button>
    <?php endforeach ?>
    </form>
   <?php if (!empty($result)): ?>
   <pre><?= print_r($result, true) ?></pre>
   <?php endif ?>

Answer 1

// handle post
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$error = [];
$result = '';

// validate input
if (empty($_POST['service'])) {
    $error = [
        'service' => 'Service type required!'    
    ];
} elseif (!array_key_exists($_POST['service'], $commands)) {
    $error = [
        'service' => 'Invalid Service!'    
    ];
}
//you need add this line
else $result = $commands[$_POST['service']];
}

Answer 2

您很可能会遇到权限问题，因为网络服务器用户www-data将不拥有重新启动服务的权限。

所以，除非你允许，否则它不起作用。 The previous code有效是因为您使用root用户通过SSH登录。

好的，如果您确实添加了允许www-data来重启服务，那么您的代码将如下所示。使用exec()执行cmd。

<?php
// define cmds
$commands = [
    'stop_apache' => [
        'description' => 'Stop Apache2',
        'cmd' => 'systemctl stop apache2'
    ],
    'restart_apache' => [
        'description' => 'Restart Apache2',
        'cmd' => 'systemctl restart apache2'
    ],
    'start_apache' => [
        'description' => 'Start Apache2',
        'cmd' => 'systemctl start apache2'
    ],
    'status_apache' => [
        'description' => 'Status Apache2',
        'cmd' => 'systemctl status apache2'
    ],
];

// handle post
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $error = [];
    $result = '';

    // validate input
    if (empty($_POST['service'])) {
        $error = [
            'service' => 'Service type required!'    
        ];
    } elseif (!array_key_exists($_POST['service'], $commands)) {
        $error = [
            'service' => 'Invalid Service!'    
        ];
    }

    if (empty($error)) {
        exec($commands[$_POST['service']]['cmd'], $output, $status_code);
        if ($status_code === 0) {
            $result = 'Service restarted';
        } else {
            $error = 'Could not restart service! Status code: '.$status_code;
        }
    }
}
?>
<form action="" method="post">
    <?php if (!empty($error)): ?>
    <h3>Error</h3>
    <pre><?= print_r($error, true) ?></pre>
    <?php endif ?>
    <?php foreach ($commands as $key => $command): ?>
    <button type="submit" name="service" value="<?= $key ?>"><?= $command['description'] ?></button>
    <?php endforeach ?>
</form>

<?php if (!empty($result)): ?>
<pre><?= print_r($result, true) ?></pre>
<?php endif ?>
</form>

您会注意到Could not restart service! Status code: 1会失败 - 因为www-data没有权限。你应该阅读https://serverfault.com/questions/69847/linux-how-to-give-a-user-permission-to-restart-apache如何解决这个问题，同时要注意它会打开错误代码不断重启apache和DOS的可能性。

就我个人而言，我不会直接按照您的意愿去做，而是设置一个由root用户运行的任务，然后将操作（重启，停止等）放入队列中运行。

希望有所帮助。

PHP脚本不起作用

2 个答案: