diff --git a/dblayer.php b/dblayer.php
index 824810c..611f674 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -551,6 +551,7 @@ class dblayer extends PDO
     array_walk ($binds, function(&$value, $key) {
       $value = md5 ($value);
     });
+    $datasOK = $this->pre-insert ($datasOK);
     $req = "INSERT INTO $this->sep$this->tableprefix$this->table$this->sep ";
     $req .= "($this->sep".
             implode ("$this->sep,$this->sep", array_keys ($datasOK)).
@@ -586,7 +587,9 @@ class dblayer extends PDO
       echo "dblayer execute exception : ".$e->getMessage()."\n";
       exit;
     }
-    return $this->lastInsertId();
+    $lastID = $this->lastInsertId();
+    $lastID = $this->hookpostinsert ($datasOK, $lastID);
+    return $lastID;
   }
 
   /** Read the table content based on a select filter, ordered by order
@@ -785,6 +788,7 @@ class dblayer extends PDO
         $datasOK[$field] = $datas[$field];
     }
 
+    $datasOK = $this->hookpreupdate ($updatekey, $datasOK);
     $req = "UPDATE $this->sep".$this->tableprefix."$this->table$this->sep SET ";
     $i = 0;
     foreach ($datasOK as $key=>$val)
@@ -840,7 +844,10 @@ class dblayer extends PDO
     }
 
     $st->execute ();
-    return $st->rowCount ();
+    $nbLinesUpdated = $st->rowCount ();
+    $nbLinesUpdated = $this->hookpostupdate ($updatekey, $datasOK,
+                                             $nbLinesUpdated);
+    return $nbLinesUpdated;
   }
 
   /** Delete a tuple identified by its primary key
@@ -851,6 +858,7 @@ class dblayer extends PDO
     if ($this->debug) echo "== Entering delete\n";
     if ($this->sep === "")
       throw new Exception (dgettext("domframework", "Database not connected"));
+    $deletekey = $this->hookpredelete ($deletekey);
     $req = "DELETE FROM $this->sep$this->tableprefix$this->table$this->sep ";
     $req .= "WHERE $this->primary = :primary";
     $st = $this->prepare ($req);
@@ -859,7 +867,9 @@ class dblayer extends PDO
                            var_export ($deletekey, TRUE)."\n";
     $st->bindValue (":primary", $deletekey);
     $st->execute ();
-    return $st->rowCount();
+    $nbLinesDeleted = $st->rowCount();
+    $nbLinesDeleted = $this->hookpostdelete ($deletekey, $nbLinesDeleted);
+    return $nbLinesDeleted;
   }
 
   /** Translation of fields */
@@ -1225,6 +1235,57 @@ class dblayer extends PDO
       $res[] = $d;
     return $res;
   }
+
+  /** Hook preinsert
+      This hook is run before inserting a new data in the database, after the 
+      verification 
+      @param array the data to insert in the database
+      @return the modified datas */
+  public function hookpreinsert ($data)
+  {
+    return $data;
+  }
+
+  /** Hook postinsert
+      This hook is run after successfuly insert a new data in the database
+      @return the modified lastID */
+  public function hookpostinsert ($data, $lastID)
+  {
+    return $lastID;
+  }
+
+  /** Hook preupdate
+      This hook is run before updating a data in the database, after the 
+      verification 
+      @return the modified datas */
+  public function hookpreupdate ($updatekey, $data)
+  {
+    return $data;
+  }
+
+  /** Hook postupdate
+      This hook is run after successfuly update a data in the database
+      @return the modified $nbLinesUpdated */
+  public function hookpostupdate ($updatekey, $data, $nbLinesUpdated)
+  {
+    return $nbLinesUpdated;
+  }
+
+  /** Hook predelete
+      This hook is run before deleting a data in the database
+      @return the modified $deletekey */
+  public function hookpredelete ($deletekey)
+  {
+    return $deletekey;
+  }
+
+  /** Hook postdelete
+      This hook is run after successfuly deleting a data in the database
+      @return $nbLinesUpdated */
+  public function hookpostdelete ($deletekey, $nbLinesDeleted)
+  {
+    return $nbLinesDeleted;
+  }
 }
 
 /** POC :