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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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