copy(file1,file2) copies file1 to another location as file2. If it's successful, return true, otherwise false. system() function may be used to execute the copy command.

<?PHP
	$file1="C:\Windows\win.ini";
	$file2="C:\win.ini";
	copy($file1,$file2);
	
	$cpfile = "copy \"$file1\" \"$file2\"";
	$cpfile = strtolower($cpfile);
	system($cpfile);	
?>

clone() function copies an PHP object.

<?PHP
	class colleague
	{
		private $name;
		private $age;
		public function colleague($n="",$a=""){
			$this->name = $n;
			$this->age = $a;
		}
		...
	}
	$obj = new colleague("john","25");
	$obj2 = clone $obj;
?>