Donate to specific categories or causes using PMPro Register Helper.

pmpro-custom-donation-categories.php

<?php
/*Donate to specific categories or causes using PMPro Register Helper. This is different and independent from the PMPro Donations Add On.*/
function my_pmpro_checkout_level($level)
{
	$donation = 0;

	if(!empty($_REQUEST['donation_general_npso_gift']) && is_numeric($_REQUEST['donation_general_npso_gift']))
	{
		// $level->initial_payment = $level->initial_payment + ;    
		$donation = $donation + $_REQUEST['donation_general_npso_gift'];
	}
 
	if(!empty($_REQUEST['donation_rare_and_endangered_plant_fund']) && is_numeric($_REQUEST['donation_rare_and_endangered_plant_fund']))
	{
		// $level->initial_payment = $level->initial_payment + ;
		$donation = $donation + $_REQUEST['donation_rare_and_endangered_plant_fund'];
	}
 
	if(!empty($_REQUEST['donation_leighton_ho_memorial_fund']) && is_numeric($_REQUEST['donation_leighton_ho_memorial_fund']))
	{
		$donation = $donation + $_REQUEST['donation_leighton_ho_memorial_fund'];
	}

	 $level->initial_payment = $level->initial_payment + $donation;
 
  return $level;
}
add_filter("pmpro_checkout_level", "my_pmpro_checkout_level");

function my_pmprorh_init()
{
	//don't break if Register Helper is not loaded
	if(!function_exists( 'pmprorh_add_registration_field' )) {
		return false;
	}
	

	//define the fields
	$fields = array();
	$fields[] = new PMProRH_Field(
		'donation_general_npso_gift',
		'text',
		array(
			'label'		=> 'General NPSO Gift',
			'size'		=> 7,
			'profile'	=> 'admin_only'
		)
	);
	
	$fields[] = new PMProRH_Field(
		'donation_rare_and_endangered_plant_fund',
		'text',
		array(
			'label'		=> 'Rare and Endangered Plant Conservation Fund',
			'size'		=> 7,
			'profile'	=> 'admin_only'
		)
	);
	
	$fields[] = new PMProRH_Field(
		'donation_leighton_ho_memorial_fund',
		'text',
		array(
			'label'		=> 'Leighton Ho Memorial Field Botany Fund',
			'size'		=> 7,
			'profile'	=> 'admin_only'
		)
	);
	
	pmprorh_add_checkout_box("donations", "Donations"); 

	//add the fields into a new checkout_boxes are of the checkout page
	foreach($fields as $field)
		pmprorh_add_registration_field(
			'donations',
			$field
		);
	//that's it. see the PMPro Register Helper readme for more information and examples.
}
add_action( 'init', 'my_pmprorh_init' );