$file = 'example.txt'; if (file_exists($file)) { $handle = fopen($file, 'w'); fwrite($handle, 'Hello World!'); fclose($handle); }
$string = 'Lorem Ipsum'; echo strtolower($string); // Output: lorem ipsum echo strtoupper($string); // Output: LOREM IPSUM echo str_replace('Ipsum', 'Dolor', $string); // Output: 'Lorem Dolor'
$dir = 'example'; if (!is_dir($dir)) { mkdir($dir); } $files = scandir($dir); foreach ($files as $file) { echo $file; }In conclusion, PHP Utility Option is a package library that provides various utility functions, making PHP programming easier and more efficient.