Hide PayPal button if user is not approved to check out for this level.

my_pmpro_checkout_before_submit_button_hide_ppe.php

<?php

/**
 * Hide PayPal button if user is not approved to check out for this level.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
 function my_pmpro_checkout_before_submit_button_hide_ppe( $restricted ) {
	global $pmpro_level, $current_user;

	if ( ! class_exists( 'PMPro_Approvals' ) ) {
		return;
	}
	$approvals = PMPro_Approvals::get_instance();

	//does this level require approval of another level?
	$restrict_checkout = $approvals::restrictCheckout( $pmpro_level->id );
	if ( $restrict_checkout ) {
		$other_level = pmpro_getLevel( $restrict_checkout );

		//check that they are approved and not denied for that other level
		if ( $approvals::isDenied( null, $pmpro_level->id ) || $approvals::isDenied( null, $restrict_checkout ) || $approvals::isPending( null, $restrict_checkout ) ) {
			?>
			<style>
				#pmpro_btn-submit-paypalexpress {
					display: none;
				}
			</style>
			<?php
		}
	}
}
add_filter( 'pmpro_checkout_before_submit_button', 'my_pmpro_checkout_before_submit_button_hide_ppe', 100 );