how to get list of field names by select its node type in drupal?

Question

I got the all node type list in a variable using get_node_type_info() and now am passing this variable to field_info_instances as:

array_keys(field_info_instances("node", $op_keys));

ps: $op_keys is the variable to get node types. But this is giving me list of node_type "keys" and I want field "keys".

Either tell:

(1)how to pass list of all node types as a $bundle_name in field_info_instances() ?

or

(2) when selecting any of the node_type (as an option of select list) from select list, it's corresponding field's name will get rendered. I mean to say for example: node_type = "Article" and its field names = "body", "title", "image". when "article" got clicked from select list, "body", "title", "image" should get rendered.

Answer 1

Try field_read_fields you should be able to request keys as a parameter in argument 1. And then for the conditions in argument 2 limit the fields returned by the inquiry by supplying entity and bundle keys to limit how many fields you get back. You may get back the fields used in the bundle -- but it should include the keys value.

Answer 2

To get a list of field names for each content type,, stored in a variable "list", given an array of bundle names, you could do: $list = array(); foreach($bundle_names as $bundle){ $list[$bundle] = array_keys(field_info_instances('node', $bundle)); } Hope that helps.