In a record form, clicking on the Insert, Update or Delete buttons causes the corresponding action to be executed against the database, provided that all validation checks for the submitted values caused no errors. However, there sometimes arises the need to prevent the insert, update or delete actions from being performed based on a condition that is determined dynamically. For instance, if certain users should not be able to update a record, you can check the identity of the user and disable the update action if they try to update the record. The code to do this is of the following nature in ASP:

'To prevent an insert action from proceeding
FormName.InsertAllowed = false

'To prevent an update action from proceeding
FormName.UpdateAllowed = false

'To prevent a delete action from proceeding
FormName.DeleteAllowed = false

and in PHP the code would be:

'To prevent an insert action from proceeding
global $FormName;
$FormName->InsertAllowed = false;

'To prevent an update action from proceeding
global $FormName;
$FormName->UpdateAllowed = false;

'To prevent a delete action from proceeding
global $FormName
$FormName->DeleteAllowed = false;

In the above code, FormName should be replaced with the actual name of the record form.