Export postmeta (custom fields)

For plugin “All Export”: Create the necessary functions and give it to save and then in each created field add the name of the function corresponding to the necessary field and the variable containing the data is $value, example:

function address($value){
$data = maybe_unserialize($value);
$data = $data[address];
return $data;
}

function latitud($value){
$data = maybe_unserialize($value);
$data = $data[gpsLatitude];
return $data;
}

With this you will get the value of each field.