Mine

<?php
		
	$num = 1111;
	
	function fei($d) {
		global $num;
		for ($x = 1; $x <= 9; $x++) {
		//echo "on $d ($x): \n";
			if ($d != 1)
				fei($d - 1);
			
			$num += pow(10, $d - 1);
			echo "$num\n";
		}
		$num -= pow(10, $d - 1) * ($x-1);
	}
	echo "<pre>";
	fei(strlen(strval($num)));
	
?>