Code to collect additional donations to specific categories at checkout, display fields on admin profile view, Members List, and include in Members List CSV Export.

pmpro_customizations_lisagrayarea.php

<?php
/*
 * Code to collect additional donations to specific categories or causes using the
 * Register Helper Add On for Paid Memberships Pro.
 * This is a different/independent approach from using the Donations Add On for Paid Memberships Pro.
 */
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");

/*
 * Donation Fields for lisagrayarea Forum Thread
 */
 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'	=> 'only_admin',
			'memberslistcsv' => true,
		)
	);

	$fields[] = new PMProRH_Field(
		'donation_rare_and_endangered_plant_fund',
		'text',
		array(
			'label'		=> 'Rare and Endangered Plant Conservation Fund',
			'size'		=> 7,
			'profile'	=> 'only_admin',
			'memberslistcsv' => true,
		)
	);

	$fields[] = new PMProRH_Field(
		'donation_leighton_ho_memorial_fund',
		'text',
		array(
			'label'		=> 'Leighton Ho Memorial Field Botany Fund',
			'size'		=> 7,
			'profile'	=> 'only_admin',
			'memberslistcsv' => true,
		)
	);

	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' );

// Add the column headings to the Members List
function my_pmpro_memberslist_extra_cols_header ( $theusers ) { ?>
	<th><?php esc_attr_e('General NPSO Gift', 'paid-memberships-pro' ); ?></th>
	<th><?php esc_attr_e('Rare and Endangered Plant Conservation Fund', 'paid-memberships-pro' ); ?></th>
	<th><?php esc_attr_e('Leighton Ho Memorial Field Botany Fund', 'paid-memberships-pro' ); ?></th>
	<?php
}
add_action( 'pmpro_memberslist_extra_cols_header', 'my_pmpro_memberslist_extra_cols_header', 10 );

// Add the row content for new columns on the Members List
function my_pmpro_memberslist_extra_cols_body( $theuser ) {
	$donation_general_npso_gift = get_user_meta( $theuser->ID, 'donation_general_npso_gift', true );
	$donation_rare_and_endangered_plant_fund = get_user_meta( $theuser->ID, 'donation_rare_and_endangered_plant_fund', true );
	$donation_leighton_ho_memorial_fund = get_user_meta( $theuser->ID, 'donation_leighton_ho_memorial_fund', true );
	?>
	<td>
		<?php if ( ! empty( $donation_general_npso_gift ) ) { ?>
			<?php esc_attr_e( $donation_general_npso_gift ); ?>
		<?php } else { ?>
			--
		<?php } ?>
	</td>
	<td>
		<?php if ( ! empty( $donation_rare_and_endangered_plant_fund ) ) { ?>
			<?php esc_attr_e( $donation_rare_and_endangered_plant_fund ); ?>
		<?php } else { ?>
			--
		<?php } ?>
	</td>
	<td>
		<?php if ( ! empty( $donation_leighton_ho_memorial_fund ) ) { ?>
			<?php esc_attr_e( $donation_leighton_ho_memorial_fund ); ?>
		<?php } else { ?>
			--
		<?php } ?>
	</td>
	<?php
	}
add_action('pmpro_memberslist_extra_cols_body', 'my_pmpro_memberslist_extra_cols_body');