How can PHP beginners avoid common mistakes when transitioning from MySQL to text file storage for data in their applications?

When transitioning from MySQL to text file storage for data in PHP applications, beginners should be mindful of potential issues such as data integrity, security, and performance. To avoid common mistakes, it is important to properly sanitize user input, handle file read/write operations securely, and implement error handling to prevent data loss or corruption.

// Example code snippet demonstrating secure file read/write operations in PHP

// Define the file path for storing data
$file_path = 'data.txt';

// Write data to the file securely
$data_to_write = "Hello, World!";
file_put_contents($file_path, $data_to_write, LOCK_EX);

// Read data from the file securely
$data_read = file_get_contents($file_path);
echo $data_read;