How to put Periods and Spaces for Array Values (Meta Key)
You may have build your meta box wrong: If your custom field names are not valid variable names PHP will convert all characters not matching [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff] to underscores. The reason: register_globals. A request field must be able to work as a variable. There are two workarounds: Name the field like an array: <input name=”foo[TrackNumber mp3.Artist]”>. … Read more