How can you check if a PHP script is already running and execute specific actions based on that?

To check if a PHP script is already running, you can use a lock file approach. The script can create a lock file when it starts running and remove it when it finishes. Before running, it can check for the existence of the lock file and take specific actions based on that. 

$lockFile = 'script.lock';

// Check if the lock file exists
if (file_exists($lockFile)) {
    // Script is already running, take specific actions here
    echo "Script is already running.";
    exit;
} else {
    // Create the lock file
    file_put_contents($lockFile, '');
    
    // Your script logic goes here

    // Remove the lock file when finished
    unlink($lockFile);
}

Keywords

PHP script running execute actions

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