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Fix PHP 8.1 "strlen(null)" exception which blocks rendering error pages for Packages' Create Package and Fund's Create Initiative
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Authored by aklapper on May 6 2023, 23:13.
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Details

Summary

strlen() was used in Phabricator to check if a generic value is a non-empty string.
This behavior is deprecated since PHP 8.1. Phorge adopts phutil_nonempty_string() as a replacement.

Note: this may highlight other absurd input values that might be worth correcting
instead of just ignoring. If phutil_nonempty_string() throws an exception in your
instance, report it to Phorge to evaluate and fix that specific corner case.

Closes T15365

Test Plan

Applied this change and /packages/package/edit/form/default/ and /fund/create/ finally rendered in web browser, showing the expected error messages about not having entered any data in the creation page.

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Event Timeline

aklapper requested review of this revision.May 6 2023, 23:13

Thanks again

Tested this patch locally. I logged $value with phlog() while doing things and I can confirm it only contains the exact user input value of generic text inputs, so it should be always a string or null as we think.

Tested creating a Package, a Task, a Fund, an Herald Rule and a Project.

No implosions

The function phutil_nonempty_string() will report any alien value, and that is OK.

sgtm

This revision is now accepted and ready to land.May 8 2023, 19:25
arnold subscribed.

When editing almanac hosts, I get this: (url /almanac/interface/edit/1/)

2023/05/12 11:34:13 [error] 6844#6844: *51 FastCGI sent in stderr: "PHP message: [2023-05-12 08:34:13] EXCEPTION: (InvalidArgumentException) Call to phutil_nonempty_string() expected null or a string, got: int. at [<arcanist>/src/utils/utils.php:2127]; PHP message: arcanist(head=master, ref.master=c14785c3795c), phorge(head=master, ref.master=4d9719539773); PHP message: #0 <#2> phutil_nonempty_string(integer) called at [<phorge>/src/applications/transactions/storage/PhabricatorModularTransactionType.php:342]; PHP message: #1 <#2> PhabricatorModularTransactionType::isEmptyTextTransaction(integer, array) called at [<phorge>/src/applications/almanac/xaction/AlmanacInterfacePortTransaction.php:33]; PHP message: #2 <#2> AlmanacInterfacePortTransaction::validateTransactions(AlmanacInterface, array) called at [<phorge>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:2871]; PHP message: #3 <#2> PhabricatorApplicationTransactionEditor::validateTransaction(AlmanacInterface, string, array) called at [<phorge>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:1234]; PHP message: #4 <#2> PhabricatorApplicationTransactionEditor::applyTransactions(AlmanacInterface, array) called at [<phorge>/src/applications/transactions/editengine/PhabricatorEditEngine.php:1149]; PHP message: #5 <#2> PhabricatorEditEngine::buildEditResponse(AlmanacInterface) called at [<phorge>/src/applications/transactions/editengine/PhabricatorEditEngine.php:1000]; PHP message: #6 <#2> PhabricatorEditEngine::buildResponse() called at [<phorge>/src/applications/almanac/controller/AlmanacInterfaceEditController.php:32]; PHP message: #7 <#2> AlmanacInterfaceEditController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284]; PHP message: #8 phlog(InvalidArgumentException) called at [<phorge>/src/aphront/handler/PhabricatorDefaultRequestExceptionHandler.php:41]; PHP message: #9 PhabricatorDefaultRequestExceptionHan

Fantastic, the method is called isEmptyTextTransaction() but handles integers

Let's fix

src/applications/transactions/storage/PhabricatorModularTransactionType.php
342

Hi @arnold can you please test the above change? Does it fix to you?

src/applications/transactions/storage/PhabricatorModularTransactionType.php
342

Is there a way for me to copy that patch? I'm not sure how to do that despite using phabricator for years :)

I could manually make those changes, but I don't want to make typos as I copy it

src/applications/transactions/storage/PhabricatorModularTransactionType.php
342

Let's continue this discussion here:

T15385: Fix Almanac page /almanac/interface/edit/1/