Newsgroups: php.internals
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Date: Fri, 28 Nov 2025 09:45:28 +0100
To: "Rowan Tommins [IMSoP]" <imsop.php@rwec.co.uk>
Cc: internals@lists.php.net
Subject: Re: [PHP-DEV] [RFC] Context Managers
In-Reply-To: <d282c072-0403-4e33-b17b-bfcdd105e9c2@rwec.co.uk>
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Message-ID: <4cd2ddbea516f91bf258b9f223c62296@bastelstu.be>
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From: tim@bastelstu.be (=?UTF-8?Q?Tim_D=C3=BCsterhus?=)

Hi

Am 2025-11-06 00:27, schrieb Rowan Tommins [IMSoP]:
> I think you may have missed the key distinction between a "Context 
> Manager" (as designed by Python) and a "Disposable" (as used in C# and 
> others): the Context Manager is not the resource itself, it exists only 
> to meet the protocol/interface.
> 
> In this code:
> 
> with ( $dbConnection->transaction() as $handle ) {
>    $handle->execute('I am in the transaction');
> }
> 
> $handle is *not* the value returned by $dbConnection->transaction(), 
> it's the value returned 
> by $dbConnection->transaction()->enterContext().

For reference: This topic was/is also discussed in your sibling thread 
starting at https://news-web.php.net/php.internals/129464. I also 
stumbled upon this being completely unexpected from just looking at the 
code. If multiple participants on this list with a above-average 
knowledge of PHP (or even engine knowledge) find this unclear, I am 
really concerned about the clarity for “regular PHP developers”.

Best regards
Tim Düsterhus