Add Custom Field Key in functions.php

Is there any way to add custom field keys to the dropdown of the custom fields on the "add new post" page with开发者_如何学运维out adding the fields?

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Check add_meta_box (It allows plugin developers to add sections to the Write Post, Write Page, and Write Link editing pages. ):

http://codex.wordpress.org/Function_Reference/add_meta_box

Or these plugins:

• Custom Field Template: http://wordpress.org/extend/plugins/custom-field-template/
• Flutter: http://flutter.freshout.us/ (this one may be what you are looking for)
• Magic Fields: http://wordpress.org/extend/plugins/magic-fields/

Source: http://sltaylor.co.uk/blog/control-your-own-wordpress-custom-fields/

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Adding Meta Boxes is definitely the way to go. The following should help you:

http://farinspace.com/wordpress-meta-box-next-level/

http://farinspace.com/custom-fields-area-uncluttered/