PHP Base64URL vs Base64 implementation: Troubleshooting for API gateway
PHP guide for base64url vs base64 implementation in API gateway: checks, failure modes and no-upload steps. Updated 2026.
Execution checklist
- Validate payload and identify first non-recoverable parser/decoder error.
- Normalize format assumptions for PHP and API gateway workflows.
- Apply minimal fix and rerun validation locally without upload.
- Capture final runbook in team docs and link to related guide pages.