What are the best practices for dynamically including variables from a text file in PHP without compromising security?

When dynamically including variables from a text file in PHP, it is important to sanitize the input to prevent any malicious code execution. One way to do this is by using PHP's `file_get_contents()` function to read the contents of the text file and then using `json_decode()` to parse the JSON data securely. This approach ensures that only valid variables are included without compromising security. 

// Read contents of the text file
$file_contents = file_get_contents('variables.txt');

// Parse the JSON data securely
$variables = json_decode($file_contents, true);

// Check if the variables are valid
if ($variables !== null) {
    // Include the variables dynamically
    extract($variables);
} else {
    // Handle invalid data or display an error message
    echo 'Error parsing variables from the text file.';
}

Keywords

file_get_contents include security validation escaping

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