best content protector plugin in wordpress

In this blog I am writing, I build this plugin.

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1. Content Not Locked After Introduction:
   • The content should lock after the first paragraph for users without the required plan or active subscription, but it’s not working as expected.
   • This issue likely stems from the restrict_content method in class-ccpp-frontend.php, possibly due to how paragraphs are split or how access is checked for anonymous users.
2. PayPal API Integration Not Working:
   • The PayPal API integration isn’t functioning, meaning the “Subscribe Now” button isn’t triggering the payment flow, or the AJAX calls (create_order, capture_order) are failing.
   • This could be due to issues with PayPal credentials, AJAX setup, or the PayPal SDK not loading correctly.

Problem Analysis

Content Locking Issue

• Current Behavior: The restrict_content method in class-ccpp-frontend.php splits the content using wpautop and explode(“\n”, …). It’s supposed to show the first paragraph and then display a locker with a “Subscribe Now” button for users without access.
• Potential Issues:
  • The wpautop function might not be splitting paragraphs correctly if the content doesn’t have proper <p> tags or if there are formatting issues.
  • The has_access method in class-ccpp-membership.php might not correctly identify anonymous users via the ccpp_guest_access cookie.
  • The $paragraphs array might be empty or not splitting as expected, causing the locker to not display.

PayPal API Issue

• Current Behavior: Clicking “Subscribe Now” should trigger an AJAX call to create_order, redirecting to PayPal for payment. After payment, capture_order should finalize the subscription.
• Potential Issues:
  • PayPal SDK Not Loading: The PayPal JavaScript SDK might not be loading due to an invalid client_id or a network issue.
  • AJAX Failure: The AJAX calls (create_order, capture_order) might be failing due to nonce issues, incorrect URLs, or server-side errors.
  • Credentials: The PayPal Client ID or Secret might be incorrect or not set in CCPP > Settings.
  • Return URL Handling: The return URL after payment might not be processed correctly, causing capture_order to fail.

Solution Overview

I’ll update the plugin to version 1.0.19 with the following fixes:

1. Fix Content Locking:
   • Improve paragraph splitting in restrict_content to handle various content formats.
   • Enhance has_access to reliably check for both logged-in and anonymous users.
   • Add debug logging to identify why the locker isn’t appearing.
2. Fix PayPal API Integration:
   • Ensure the PayPal SDK loads correctly by validating the Client ID and adding error handling.
   • Fix AJAX calls by verifying nonce, URL, and response handling.
   • Add debug logging to trace the payment flow.
   • Ensure capture_order handles the return URL and finalizes the subscription.