Allow Non-Standard Tags in the Editor

If you find yourself needing to add non-standard tags to the WordPress editor, you may also find yourself feeling very frustrated. With just a little bit of code, you can tell the editor to accept extra tags

add_filter( 'tiny_mce_before_init', 'mce_extended_valid_elements', 10, 2);
function mce_extended_valid_elements( $mceInit, $editor_id ) {
	//allow only the basic tag
	//$mceInit['extended_valid_elements'] .= ',sometag';
	//allow the tag and a attribute
	$mceInit['extended_valid_elements'] .= ',sometag[someattribute]';
	//allow the tag and multiple attribute
	//$mceInit['extended_valid_elements'] .= ',sometag[someattribute|anotherattribute]';
	//allow the tag and any attribute
	//$mceInit['extended_valid_elements'] .= ',sometag[*]';
	return $mceInit;

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