Added new db_tables_exist function and Fixed a missing-table bug when…

… browsing result if the admin has deleted the token table

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/phpsurveyor@2466 b72ed6b6-b9f8-46b5-92b4-906544132732

admin/browse.php

@@ -555,7 +555,8 @@
 		if ($private == "N")
 		{
 			$SQL = "Select * FROM {$dbprefix}tokens_$surveyid WHERE token=?";
-			if ($SQLResult = db_execute_assoc($SQL, $dtrow['token']))
+			if ( db_tables_exist("{$dbprefix}tokens_$surveyid") &&
+				$SQLResult = db_execute_assoc($SQL, $dtrow['token']))
 			{
 				$TokenRow = $SQLResult->FetchRow();
 			}

common.php

@@ -389,6 +389,27 @@ function db_select_tables_like($table)
 	}	
 }
 
+/*
+ *  Return a boolean stating if the table(s) exist(s)
+ *  Accepts '%' in names since it uses the 'like' statement
+ */
+function db_tables_exist($table)
+{
+	global $connect;
+
+	$surveyHasTokensTblQ = db_select_tables_like("$table");
+	$surveyHasTokensTblResult = db_execute_num($surveyHasTokensTblQ);
+
+	if ($surveyHasTokensTblResult->RecordCount() >= 1)
+	{
+		return TRUE;
+	}
+	else
+	{
+		return FALSE;
+	}
+}
+
 /**
 * getsurveylist() Queries the database (survey table) for a list of existing surveys
 * @global string $surveyid