diff --git a/db.class.php b/db.class.php
index 080a603..938a434 100644
--- a/db.class.php
+++ b/db.class.php
@@ -179,7 +179,7 @@ class DB
     call_user_func_array('DB::queryNull', $args);
   }
   
-  public static function insertOrReplace($which, $table, $datas) {
+  public static function insertOrReplace($which, $table, $datas, $options=array()) {
     $datas = unserialize(serialize($datas)); // break references within array
     $keys = null;
     
@@ -213,16 +213,16 @@ class DB
     $keys_str = implode(', ', DB::wrapStr($keys, '`'));
     $values_str = implode(',', $values);
     
-    DB::queryNull("$which INTO $table ($keys_str) VALUES $values_str");
+    if (isset($options['ignore']) && $options['ignore'] && strtolower($which) == 'insert') { 
+      DB::queryNull("INSERT IGNORE INTO $table ($keys_str) VALUES $values_str");
+    } else { 
+      DB::queryNull("$which INTO $table ($keys_str) VALUES $values_str");
+    }
   }
   
-  public static function insert($table, $data) {
-    return DB::insertOrReplace('INSERT', $table, $data);
-  }
-  
-  public static function replace($table, $data) {
-    return DB::insertOrReplace('REPLACE', $table, $data);
-  }
+  public static function insert($table, $data) { return DB::insertOrReplace('INSERT', $table, $data); }
+  public static function insertIgnore($table, $data) { return DB::insertOrReplace('INSERT', $table, $data, array('ignore' => true)); }
+  public static function replace($table, $data) { return DB::insertOrReplace('REPLACE', $table, $data); }
   
   public static function delete() {
     $args = func_get_args();
diff --git a/simpletest/BasicTest.php b/simpletest/BasicTest.php
index da92559..e5e82b8 100644
--- a/simpletest/BasicTest.php
+++ b/simpletest/BasicTest.php
@@ -222,6 +222,16 @@ class BasicTest extends SimpleTest {
     $this->assert($smile === $getsmile2);
     $this->assert($smile === $getsmile3);
   }
+  
+  function test_6_insert_ignore() {
+    DB::insertIgnore('accounts', array(
+      'id' => 1, //duplicate primary key
+      'username' => 'gonesoon',
+      'password' => 'something',
+      'age' => 61,
+      'height' => 199.194
+    ));
+  }
 
 }