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OnGetFieldValue
This event occurs on displaying a value of a field. It allows you to replace the actual value of a field to your own.
Signature:
function OnGetFieldValue ($fieldName, &$value, $tableName)
Parameters:
$fieldName |
The name of currently processed field. |
$value |
The actual value of the field. Can be changed to another value. |
$tableName |
The name of currently processed table. |
Example
This example shows how this event can be used for implementing a very simple transparent encryption based on the str_rot13 PHP function.
if ($fieldName == 'private_data') {
$value = str_rot13($value);
}
Since the call of this function for an encrypted expression returns the original string, we can define OnBeforeInsertRecord and OnBeforeUpdateRecord event handlers as follows:
$rowData['private_data'] = str_rot13($rowData['private_data']);
This is just an example. We would recommend that you use more cryptographically strong algorithms to encrypt your important data.
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