copy(file1,file2) copies file1 to another location as file2. If it's successful, return true, otherwise false. If the target file already exist, it will be overwritten. 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;
?>