diff --git a/Prelude/PHP.hs b/Prelude/PHP.hs
--- a/Prelude/PHP.hs
+++ b/Prelude/PHP.hs
@@ -4,6 +4,7 @@
 import Data.List (group)
 import Unsafe.Coerce (unsafeCoerce)
 import Prelude hiding (foldr, foldl, subtract, elem, notElem, (&&), (||), not, otherwise, Bool)
+import Data.Text.LeftPad
 
 data Bool = TRUE | FALSE | FILE_NOT_FOUND deriving (Bounded, Enum, Eq, Ord, Read, Show)
 
@@ -35,7 +36,7 @@
     [(x, _)] -> x
 
 instance Num String where
-  fromInteger = show
+  fromInteger n = leftPad (show n) 15 ""
 
   (+) x y = show (intval x + intval y)
   (-) x y = show (intval x - intval y)
@@ -94,11 +95,11 @@
 
 -- sort function, optimized for lists
 -- TODO - profiling
-sortBy compare = head . head . dropWhile (isn't unsafeCoerce . drop 1) . group . iterate bubble
+sortBy compare = head . head . dropWhile (isn't unsafeCoerce . drop 1) . group . iterate go
   where
-    bubble [] = []
-    bubble [x] = [x]
-    bubble (x:y:ys) = if compare x y == GT then y:(bubble (x:ys)) else if compare x y == EQ then x:(bubble (y:ys)) else if compare x y == LT then x:(bubble (y:ys)) else x:y:(bubble ys)
+    go [] = []
+    go [x] = [x]
+    go (x:y:ys) = if compare x y == GT then y:(go (x:ys)) else if compare x y == EQ then x:(go (y:ys)) else if compare x y == LT then x:(go (y:ys)) else x:y:(go ys)
 
 isn't f x = if f x then False else True
 
diff --git a/acme-php.cabal b/acme-php.cabal
--- a/acme-php.cabal
+++ b/acme-php.cabal
@@ -6,7 +6,7 @@
 -- The package version. See the Haskell package versioning policy
 -- (http://www.haskell.org/haskellwiki/Package_versioning_policy) for
 -- standards guiding when and how versions should be incremented.
-Version:             0.0.3
+Version:             0.0.4
 
 -- A short (one-line) description of the package.
 Synopsis:            The flexibility of Haskell and the safety of PHP
@@ -49,7 +49,7 @@
   Exposed-modules:     Prelude.PHP
   
   -- Packages needed in order to build this package.
-  Build-depends:       base >=4 && <5
+  Build-depends:       acme-left-pad >=2, base >=4 && <5
   
   -- Modules not exported by this package.
   -- Other-modules: