Start of PHP doc updates

[avanscoy]

Description

Updates to outdated PHP articles after review from current SDK liaison.

References

Testing

Checklist

• I've read and followed CONTRIBUTING.md.
• I've tested the site build for this change locally.
• I've made appropriate docs updates for any code or config changes.
• I've coordinated with the Product Docs and/or Docs Management team about non-trivial changes.

[mintlify]

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Project	Status	Preview	Updated (UTC)
auth0	🟢 Ready	View Preview	Jun 30, 2026, 6:04 PM

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[mintlify]

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Project	Status	Preview	Updated (UTC)
auth0-docs-dev	🟢 Ready	View Preview	Jun 30, 2026, 6:06 PM

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[mintlify]

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Project	Status	Preview	Updated (UTC)
auth0-docs-staging	🟢 Ready	View Preview	Jun 30, 2026, 6:05 PM

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[github-actions]

Summary

Status	Count
🔍 Total	64
✅ Successful	12
⏳ Timeouts	0
🔀 Redirected	2
👻 Excluded	50
❓ Unknown	0
🚫 Errors	0
⛔ Unsupported	0

Redirects per input

Redirects in main/docs/libraries/auth0-php.mdx

• [200] https://secure.php.net/manual/en/reserved.variables.environment.php | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://secure.php.net/manual/en/reserved.variables.environment.php --> https://www.php.net/manual/en/reserved.variables.environment.php

Redirects in main/docs/libraries/auth0-php/validating-jwts-with-auth0-php.mdx

• [200] https://jwt.io/ | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://jwt.io/ --> https://www.jwt.io/
  Full Github Actions output

Comments addressed in recent commit

[kishore7snehil]

LGTM!