How to Fix “WordPress Requires the JSON PHP Extension” Error on Shared Hosting

This means your server’s PHP configuration does not have the JSON extension enabled.
Since WordPress relies on JSON for its REST API, Gutenberg editor, and many plugins, the extension is now mandatory.

Why This Happens on Shared Hosting

On shared hosting, the PHP configuration is controlled by your hosting provider.
However, you might still get this error due to:

• Using the wrong PHP version

• JSON extension being disabled in your account

• Using an outdated PHP version without built-in JSON support

Steps to Fix the Error (Shared Hosting Users)

1️⃣ Select the Correct PHP Version

1. Log in to your hosting cPanel

2. Go to Select PHP Version or PHP Selector (name may vary)

3. Choose PHP 7.4, 8.0, or 8.1 (use the latest stable version available)

4. Click Set as current

2️⃣ Enable the JSON Extension

1. On the same Select PHP Version page, scroll down

2. Find and check the box for json or php-json

3. Click Save or Apply

3️⃣ Verify JSON Extension is Enabled

• Create a file named phpinfo.php in your website’s public_html folder: