Sample
nesbot/carbon 3.13.2: Handle Carbon mutable in-place modifier mutations, createFromFormat current-time inheritance, month overflow arithmetic, and signed float diffInDays in Carbon 3
Verified sample for composer nesbot/carbon 3.13.2: Handle Carbon mutable in-place modifier mutations, createFromFormat current-time inheritance, month…
sha256:e6d140610387c1f4afa878a5c2ea461fd961a59aa12d4a297bc20ee12262c871
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How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
php linux x64 php php composer
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| php 8 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · composer@1 |
2026-08-16 |
| php 8 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · composer@1 |
2026-08-18 |
Case
HOW- Goal
- Handle Carbon mutable in-place modifier mutations, createFromFormat current-time inheritance, month overflow arithmetic, and signed float diffInDays in Carbon 3
- Packages
- Symbols
-
- Carbon\Carbon
- Carbon\Carbon::createFromFormat
- Carbon\Carbon::parse
- Carbon\Carbon::startOfDay
- Carbon\Carbon::endOfDay
- Carbon\Carbon::addMonth
- Carbon\Carbon::addMonthNoOverflow
- Carbon\Carbon::diffInDays
- Carbon\Carbon::setTimezone
- Carbon\Carbon::shiftTimezone
- Carbon\CarbonImmutable
- Environment
- php
- Created
- 2026-08-16T08:46:01Z
Contract
- assert Carbon modifier methods like startOfDay() and endOfDay() mutate instance in place while CarbonImmutable returns isolated new instances
- assert createFromFormat('Y-m-d') inherits current execution wall-clock time unless reset with '!' prefix or '|' suffix to 00:00:00.000000
- assert addMonth() on month-end dates overflows into March unless addMonthNoOverflow() is explicitly used to clamp to February end
- assert diffInDays() in Carbon 3 returns signed float with fractional days by default rather than positive integer
- assert setTimezone() converts instant altering wall-clock hours while shiftTimezone() preserves wall-clock hours with updated offset
- assert embedded timezone offset in parse() payload overrides explicit timezone argument
Files
- NOTES.md
- composer.json
- composer.lock
- csx.json
- test/contract.php