Fix "Undefined offset: 1" exception in Diviner when @task value in PHPDoc is a single word
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Authored by aklapper on Jun 11 2024, 09:40.

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speck

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O1: Blessed Committers

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T15854: "Undefined array key 1" exception when @task in PHPDoc is a single string

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rPddcdd6eaf24b: Fix "Undefined offset: 1" exception in Diviner when @task value in PHPDoc is a…

Summary

The PHPDoc in https://we.phorge.it/source/phorge/browse/master/src/infrastructure/storage/lisk/LiskMigrationIterator.php$14 defines * @task storage.
That means the value of $task in the DivinerAtomController class is the single string storage and there is no whitespace to explode on and there is no second key in the array to set as $title.
Thus only call explode when $task contains a whitespace.

EXCEPTION: (RuntimeException) Undefined array key 1 at [<arcanist>/src/error/PhutilErrorHandler.php:273]
  #0 <#2> PhutilErrorHandler::handleError(integer, string, string, integer) called at [<phorge>/src/applications/diviner/controller/DivinerAtomController.php:450]

Closes T15854

Test Plan

Go to https://we.phorge.it/book/contrib/article/database/#primary-keys and click the LiskMigrationIterator link pointing to https://we.phorge.it/book/dev/class/LiskMigrationIterator/

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aklapper created this revision.Jun 11 2024, 09:40

Owners added a reviewer: O1: Blessed Committers.Jun 11 2024, 09:40

Herald added subscribers: Cigaryno, Matthew, valerio.bozzolan, tobiaswiese. · View Herald TranscriptJun 11 2024, 09:40

aklapper requested review of this revision.Jun 11 2024, 09:40

Harbormaster completed remote builds in B1342: Diff 2106.Jun 11 2024, 09:40

speck subscribed.Jun 11 2024, 17:17

speck added inline comments.

src/applications/diviner/controller/DivinerAtomController.php
449–453	I can’t recall for php… I’d the double equals used to prevent coercion, in which case this would always be true if strpos doesn’t find anything?

aklapper added inline comments.Jun 21 2024, 14:47

src/applications/diviner/controller/DivinerAtomController.php
449–453	@speck: Hmm, not sure I can fully parse your comment, sorry. :) Looking at "Return Values" in https://www.php.net/manual/en/function.strpos.php it says "Returns false if the needle was not found. [...] Use the === operator for testing the return value of this function." and in Example 2 "The !== operator can also be used." So I think this change works as expected to only call `explode` if a whitespace was found?