blakerdev

This plugin lets you create meta boxes by creating and calling a function but without needing to reuse all of the same WordPress functions for doing so.
<h3>Arbitrary section</h3>
Here is an example meta box function:
< ?php
//Meta box for page settings 
function pageSettings() {
 //Name of the meta box (lowercase without spaces) 
 $name = 'page_settings';
 //Enter the titles for each one of your boxes 
 $titles = array('Section Headline');
 //This will run the titles through a function that converts them into lables for the form fields. 
 $boxes = makeTitles($name,$titles);
 //Description of meta box 
 $desc = 'Page Settings';
 //Show on page type: 
 $types = array('page');
 //Pull in existing meta field value 
 $setHeadline = get_post_meta($_GET['post'],"_page_settings_section_headline",true);
 $content = "Page Headline:”; 
 $content .= “”;
 //Run the function 
 $config = array( 
 ‘name’=>$name, 
 ‘boxes’=>$boxes, 
 ‘desc’=>$desc, 
 ‘type’=>$type, 
 ‘content’=>$content 
 );
 //Create the object 
 newMetaBox($config); 
}
//Run it 
pageSettings();
?>

Spiffy Meta Box Creator

This plugin lets you create meta boxes by creating and calling a function but without needing to reuse all of the same WordPress functions for doing s …

keith_wp

Change the appearance of a taxonomy’s meta box input in the Edit screen to something other than the Category checkboxes or Tag free text entry, allowing you to have your users easily pick from a predefined set of terms.

Transform Meta Boxes

Alter any taxonomy's meta box appearance (in the Classic Editor) to single or multiple select dropdowns, or toggle button style checkboxes.

Spiffy Meta Box Creator vs Transform Meta Boxes