My PHP-only e-commerce store has suddenly begun serving the checkout script as a file download instead of executing it. Nothing in the codebase or server configuration was intentionally changed prior to this happening, so I’m looking for a developer who can jump in, trace the root cause and get the checkout rendering normally again. You’ll need strong PHP debugging skills and familiarity with common culprits such as MIME-type misconfiguration, handler conflicts (mod_php vs. PHP-FPM), .htaccess directives, OPCache, or permission issues. Access to the server (SSH/cPanel) and the full application code can be provided immediately. Deliverables • Diagnose and fix the underlying problem so the checkout page executes in the browser. • Verify that other store pages remain unaffected after the fix. • Supply a brief summary of what went wrong and the steps you took, so I can avoid a repeat. A quick turnaround is important to minimise lost sales, so please let me know your availability and estimated timeframe when you respond.