vczapi-increase-time-by-mins.php

<?php
function theme_slug_disable_meeting_before_minutes( $response, $meeting_id ) {
  	
  	$meeting_details = get_post_meta( $meeting_id, '_meeting_zoom_details', true );
	
  	if ( ! empty( $meeting_details ) && is_object( $meeting_details ) ) {
		if ( $meeting_details->type === 8 || $meeting_details->type === 3 ) {
			$meeting_details->start_time = false;
		}

		$meeting_date = vczapi_dateConverter( $meeting_details->start_time, $meeting_details->timezone, false );
		$meeting_date = apply_filters( 'vczapi_woocommerce_check_deadline_crossed_meeting_date', $meeting_date, $meeting_id );
		$current_date = vczapi_dateConverter( '+30 minutes', $meeting_details->timezone, false );
		if ( $current_date > $meeting_date ) {
			$response = array(
				'valid'   => false,
				'date'    => $meeting_date,
				'message' => sprintf( apply_filters( 'vczapi_woocommerce_time_passed_text', __( 'Valid zoom meeting required - Meeting time of %s has passed', 'vczapi-woocommerce-addon' ), $meeting_date ), $meeting_date->format( 'F j, Y, g:i a' ) )
			);
		} else {
			$response = array( 'valid' => true, 'date' => $meeting_date, 'message' => '' );
		}
	}

	return $response;
}


add_filter( 'vczapi_woocommerce_check_deadline_crossed_response', 'theme_slug_disable_meeting_before_minutes', 10, 2 );

Disable the ability to buy appointments 30 minutes before the start for Zoom Meetings with WooCommerce