CakePHP edit method example.

users_controller::edit.php

  /**
   * Allows an administrator to create a new user.
   * 
   * @param   uuid    id    A user id.
   * @access  public
    */
  public function admin_edit( $id ) {
    $this->User->id = $id;
    
    if( !empty( $this->data ) ) {
      if( $this->User->save( $this->data ) ) {
        $this->Session->setFlash( sprintf( __( 'User details were updated successfully.', true ), h( $this->data['User']['first_name'] ) ), null, null, 'success' );
        $this->redirect( array( 'action' => 'index', 'admin' => true ) );
      }
      else {
        $this->Session->setFlash( __( 'There was a problem updating this user\'s details. Please check below for any error details.', true ), null, null, 'validation' );
      }
    }
    else {
      $this->data = $this->User->read();
    }
  }

users_controlleredit.php

  /**
   * Allows an administrator to create a new user.
   * 
   * @param   uuid    id    A user id.
   * @access  public
    */
  public function admin_edit( $id ) {
    $this->User->id = $id;
    
    if( !empty( $this->data ) ) {
      if( $this->User->save( $this->data ) ) {
        $this->Session->setFlash( sprintf( __( 'User details were updated successfully.', true ), h( $this->data['User']['first_name'] ) ), null, null, 'success' );
        $this->redirect( array( 'action' => 'index', 'admin' => true ) );
      }
      else {
        $this->Session->setFlash( __( 'There was a problem updating this user\'s details. Please check below for any error details.', true ), null, null, 'validation' );
      }
    }
    else {
      $this->data = $this->User->read();
    }
  }