docs(php): add php operator considerations

[bduranleau-nr]

Description

Update documentation with PHP considerations.

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature / enhancement (non-breaking change which adds functionality)
• Security fix
• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Documentation has been updated
• This change requires changes in testing:
  • unit tests
  • E2E tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.90%. Comparing base (be989b4) to head (f489166).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #151   +/-   ##
=======================================
  Coverage   59.90%   59.90%           
=======================================
  Files          22       22           
  Lines        1519     1519           
=======================================
  Hits          910      910           
  Misses        539      539           
  Partials       70       70           

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