What are some best practices for troubleshooting PHP scripts that involve multiple includes and file operations?

When troubleshooting PHP scripts that involve multiple includes and file operations, it is important to check for errors in each included file, ensure that file paths are correct, and use error handling to catch any issues that may arise. Additionally, using functions like file_exists() and is_readable() can help verify that files are accessible.

// Example code snippet for troubleshooting PHP scripts with multiple includes and file operations

// Check if the file exists before including it
if (file_exists('file1.php')) {
    include 'file1.php';
} else {
    echo 'File not found';
}

// Check if the file is readable before performing any operations
if (is_readable('file2.php')) {
    // Perform file operations here
} else {
    echo 'File is not readable';
}