Fix PHP Update WordPress Error

After upgrading my hosting environment to a newer PHP version, several of my WordPress posts and pages now throw a visible error message instead of loading normally. The rest of the site works, so I suspect a theme, plugin, or custom-code conflict that only surfaces under the new PHP build.

I can send you the exact error string as soon as we start; it consistently appears on the same URLs, which should help you trace the source quickly. I still have full access to wp-admin, cPanel, and phpMyAdmin.

What I need:
• Diagnose what in the theme, child-theme, or plugins is incompatible with the updated PHP version.
• Patch or refactor the offending code so those pages display correctly again—no deprecated warnings, no fatal errors.
• Confirm the fix survives cache clears and a test refresh of the site.
• Provide a brief summary of what was changed so I can keep future updates smooth.

Skilled with WordPress core, PHP error logging, and common tools like WP-CLI? Let’s get it sorted today so my content is fully accessible again.