PHP error with WP Biography xProfile field type sanitization callback

[imath]

When this field is empty, BP_XProfile_Field_Type_WordPress::sanitize_for_db() is generating an error trying to trim an array.

I need to understand why it's not a string as expected 🤔

[imath]

Ok, I got it: xprofile_set_field_data() is using an array for fields accepting a null value (used for checkboxes, multiselect). That's why.

[imath]

In 12977:

Make sure saving empty WP xProfile fields does generate an error

WP xProfile field types are allowing their values to be empty. In such a case the xprofile_set_field_data() is using an array as the value to be saved. This is done to avoid the value of certain types of fields (checkboxes, multiselects) to be overwritten by the default value on next edit.

For WP xProfile field types, we simply need to return an empty string in this case.

See #8494 (branch 8.0)

[imath]

In 12978:

Make sure saving empty WP xProfile fields does generate an error

WP xProfile field types are allowing their values to be empty. In such a case the xprofile_set_field_data() is using an array as the value to be saved. This is done to avoid the value of certain types of fields (checkboxes, multiselects) to be overwritten by the default value on next edit.

For WP xProfile field types, we simply need to return an empty string in this case.

Fixes #8494 (trunk)

[imath]

Ticket retargeted after milestone deleted