What are common pitfalls when working with PHP file system functions?

One common pitfall when working with PHP file system functions is not checking for errors or handling exceptions properly. It's important to always check the return values of file system functions and handle any potential errors that may occur during file operations. This can prevent unexpected behavior or crashes in your application. 

$file = 'example.txt';

// Check if file exists before attempting to read it
if (file_exists($file)) {
    $contents = file_get_contents($file);
    if ($contents !== false) {
        // Process file contents
    } else {
        // Handle error when reading file
        echo 'Error reading file';
    }
} else {
    // Handle error when file does not exist
    echo 'File does not exist';
}

Keywords

file system functions PHP errors permissions security

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