What are the best practices for handling file paths and extensions when scanning directories in PHP?

When scanning directories in PHP, it is important to handle file paths and extensions properly to ensure that the correct files are processed. To do this, you can use functions like `pathinfo()` to extract the file extension and `is_dir()` to check if a path is a directory. Additionally, you can use `glob()` or `scandir()` to retrieve a list of files in a directory. 

// Scan a directory and process files based on their extension
$directory = '/path/to/directory';

if (is_dir($directory)) {
    $files = scandir($directory);

    foreach ($files as $file) {
        if ($file != '.' && $file != '..') {
            $extension = pathinfo($file, PATHINFO_EXTENSION);

            if ($extension == 'txt') {
                // Process text files
                echo "Processing text file: $file\n";
            } elseif ($extension == 'jpg' || $extension == 'png') {
                // Process image files
                echo "Processing image file: $file\n";
            } else {
                // Handle other file types
                echo "Skipping file: $file\n";
            }
        }
    }
} else {
    echo "Invalid directory path";
}

Keywords

file paths extensions scanning directories PHP functions error types

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