Event Espresso 3 has the following kinds of question types:
Text (TEXT)
Text Area (TEXTAREA)
Radio Button (SINGLE)
Drop down (DROPDOWN)
Checkbox (MULTIPLE)
You can locate the type of question type by going to Event Espresso --> Questions. The third column shows the type:
http://cl.ly/image/0g2f3A2u2u2o
The type must be correct for the information to be transferred correctly. In the example above, we have created a custom question called Website. We are then populating it by using a Question Type of TEXT. The numeric value that appears next to is is the question ID. With the first example above, we are populating an existing system field in Infusionsoft for website by using a TEXT question type with an ID of 11.
The second example is for a custom fields that was created in Infusionsoft. Note that custom fields must begin with and underscore. Here are some examples:
_FavoriteColor
_BeverageChoice
Similar to the first example, we must match the use the correct question type and use the correct ID:
http://cl.ly/image/0I1E402I1M0s
The sample coding can be added to your child theme's functions.php file or a site specific plugin.