[Plugin: Hide Admin Bar Search] This is just CSS – know PHP method?

Yes, this is a small plugin indeed. However, it addresses the following:

• Not all people are comfortable editing their CSS
• It also hides the search in the admin/dashboard, which is not a CSS file you should be editing
• One may want it to be network-wide regardless of what theme is being used in a multisite situation (which was my reason for writing this in the first place)

There is no way to remove it using PHP – it’s baked directly in the render() method for the admin bar class. Believe me, if I could have done it that way, I would, and then would have titled the plugin “Remove Admin Bar Search” instead of “Hide Admin Bar Search”.