add Tiny class to PHP version, add tests

tiny.php

@@ -9,38 +9,43 @@
  *  Jacob DeHart (original PHP version) and Kyle Bragger (Ruby port)
  *
  * Usage:
- *  $obfuscated_id = tiny(123)
+ *  $obfuscated_id = toTiny(123)
  *  $original_id = reverseTiny($obfuscated_id)
  *
  * Configuration:
  *  * You must run Tiny::generate_set() from console (using tiny.rb) to generate your $set
  *    Do *not* change this once you start using Tiny, as you won't be able to reverseTiny()
- *    any values tiny()'ed with another set.
+ *    any values toTiny()'ed with another set.
  *
  */
 
-public function tiny($id){
-    $set = '__use the set you generate with tiny.rb (see tiny.rb for more)__';
+class Tiny {
+    public static function toTiny($id){
+        $set = 'khvrbAfsCXEzIYt30ZdVLBQy5oJeglPHnu9M67qpKxUFj1OS8GawRTcm24DWiN';//'__use the set you generate with tiny.rb (see tiny.rb for more)__';
 
-    $HexN="";
-    $id = floor(abs(intval($id)));
-    $radix = strlen($set);
-    while (true) {
-        $R=$id%$radix;
-        $HexN = $set{$R}.$HexN;
-        $id=($id-$R)/$radix;
-        if ($id==0) break;
+        $HexN="";
+        $id = floor(abs(intval($id)));
+        $radix = strlen($set);
+        while (true) {
+            $R=$id%$radix;
+            $HexN = $set{$R}.$HexN;
+            $id=($id-$R)/$radix;
+            if ($id==0) break;
+        }
+        return $HexN;
     }
-    return $HexN;
-}
 
-public function reverseTiny($str){
-    $set = '__use the SAME SET as tiny() above__';
-    $radix = strlen($set);
-    $strlen = strlen($str);
-    $N = 0;
-    for($i=0;$i<$strlen;$i++){
-        $N += strpos($set,$str{$i})*pow($radix,($strlen-$i-1));
+    public static function reverseTiny($str){
+        $set = 'khvrbAfsCXEzIYt30ZdVLBQy5oJeglPHnu9M67qpKxUFj1OS8GawRTcm24DWiN';//$set = '__use the SAME SET as tiny() above__';
+        $radix = strlen($set);
+        $strlen = strlen($str);
+        $N = 0;
+        for($i=0;$i<$strlen;$i++){
+            $N += strpos($set,$str{$i})*pow($radix,($strlen-$i-1));
+        }
+        return "{$N}";
     }
-    return "{$N}";
 }
+
+echo Tiny::toTiny(123);
+echo Tiny::reverseTiny(Tiny::toTiny(123));