Uw a href tag moet [Gemiste aanhalingstekens . zijn ]
<?php echo '<a href="delete.php?action=delete&id='.$row['ComplianceName'].'">Delete</a>';?>
<?php echo '<a href="delete.php?edit='.$row['ComplianceID'].'">Edit</a>';?>
<?php echo '<a href="delete.php?invite='.$row['id'].'">Invite Obstacle</a>';?>