PHP Version Compatibility Issues

This article explains how to fix PHP version compatibility issues that can cause your WordPress website to stop working or display errors.

What Are PHP Version Issues?

PHP is the programming language that runs WordPress. Sometimes your website's theme or plugins require a specific PHP version to work properly. When there's a mismatch, you might see:

• Error messages mentioning "PHP Fatal Error"
• A blank white screen instead of your website
• Plugins that suddenly stop working
• Admin dashboard that won't load

Step 1: Check Your Current PHP Version

1. Log into your WordPress admin dashboard
2. Go to Tools → Site Health
3. Click the Info tab
4. Look for the Server section and find "PHP version"
5. Write down this version number (for example, 7.4.33 or 8.1.12)

Step 2: Find Out What PHP Version You Need

If you recently installed a new plugin or theme before the problems started:

1. Go to Plugins → Installed Plugins
2. Look for any plugins marked with a warning or error
3. Click View details on any problematic plugins
4. Check the Requirements section for minimum PHP version

For themes:

1. Go to Appearance → Themes
2. Click on your active theme
3. Look for version requirements in the description

Step 3: Contact Web60 Support for PHP Updates

Web60 manages your server settings, including PHP versions. You cannot change these yourself.

1. Contact Web60 support through your account portal
2. Tell them:
   • Your current PHP version (from Step 1)
   • The PHP version you need
   • What error messages you're seeing
3. Support will update your PHP version safely

Step 4: Test After PHP Update

Once support updates your PHP version:

1. Clear your browser cache (press Ctrl+F5 on Windows, Cmd+Shift+R on Mac)
2. Visit your website to check it loads properly
3. Log into your WordPress dashboard
4. Check that all your plugins are working
5. Test key pages like contact forms

Step 5: Fix Remaining Plugin Issues

If some plugins still don't work after the PHP update:

1. Go to Plugins → Installed Plugins
2. Deactivate any plugins showing errors
3. Check if your website works without them
4. Look for updated versions of those plugins
5. If no updates exist, find alternative plugins that support your PHP version

For help with plugin conflicts, see our guide on plugin conflicts and resolution.

If you're still stuck after following these steps, contact Web60 support with details about what's not working and any error messages you see.

FAQ

Q: Can I change my PHP version myself?

A: No, Web60 manages all server settings including PHP versions. Contact support to request a PHP version change.

Q: Will updating PHP break my website?

A: Web60 support will check compatibility before making changes. They can also restore from backup if needed.

Q: What PHP version should I use?

A: Use the latest version that all your plugins and themes support. Web60 support can advise on the best version for your setup.

Q: How long does a PHP update take?

A: PHP updates are usually completed within a few hours during business hours.

Q: Why did this problem start suddenly?

A: Usually because you installed a new plugin or theme that needs a different PHP version, or an existing plugin updated its requirements.

Q: Can I test the new PHP version first?

A: Web60 takes automatic backups, so your site can be restored quickly if there are any issues after the PHP update.

Q: What if my theme doesn't work with newer PHP?

A: You may need to update your theme or switch to a different one. Contact the theme developer first to ask about PHP compatibility.