What are the potential pitfalls of directly writing the output of a PHP file into another file?

Directly writing the output of a PHP file into another file can potentially expose sensitive information, such as database credentials or user data, if not handled properly. To prevent this, it's important to sanitize the output before writing it to a file. This can be done by using functions like htmlentities() to escape special characters and prevent code injection attacks. 

<?php
// Sanitize the output before writing it to a file
$output = htmlentities($output);

// Write the sanitized output to a file
file_put_contents('output.txt', $output);
?>

Keywords

file handling security vulnerability injection attacks file permissions data integrity

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