Add an answer system

common.php

@@ -1,7 +1,34 @@
 <?php
 
+// The directory where code will be stored
 define("DESTINATION", "../files/");
+if (!is_writable(DESTINATION))
+  die ("Destination folder not writable");
 
+// Path to the GeSHi languages
 define("GESHI_DIR", "../geshi/geshi/");
 
+
+// The size of the generated identifier
+define("NB_CHAR", 5);
+
+// If you increase NB_CHAR, in order to help review the old codes published, you
+// can adjust the minimum
+define("ALLOW_NB_MIN", 5);
+
+
+
+/*********************************************
+* Don't make any change under this comment ! *
+*********************************************/
+if (ALLOW_NB_MIN != NB_CHAR)
+  {
+    if (ALLOW_NB_MIN > NB_CHAR)
+      define("RGXP_NB", NB_CHAR.",".ALLOW_NB_MIN);
+    else
+      define("RGXP_NB", ALLOW_NB_MIN.",".NB_CHAR);
+  }
+else
+  define("RGXP_NB", NB_CHAR);
+
 ?>