What are some common pitfalls when loading files using PHP?

One common pitfall when loading files using PHP is not properly handling file paths. It's important to ensure that the file paths are correct and that the files actually exist before attempting to load them. Additionally, it's crucial to sanitize user input to prevent directory traversal attacks. 

// Example of properly handling file paths and sanitizing user input
$filename = 'path/to/file.txt';

// Check if file exists before loading
if (file_exists($filename)) {
    // Load the file
    $file_contents = file_get_contents($filename);
} else {
    echo 'File not found.';
}

Keywords

file handling file permissions file uploads error handling security vulnerabilities

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