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Date: Thu, 24 Feb 2011 10:29:45 +0100
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To: PHP Internals <internals@lists.php.net>
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Subject: Are exceptions allowed in php core?
From: info@tyrael.hu (Ferenc Kovacs)

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Hi.

it was mentioned multiple times on the list, that exceptions from php core
is prohibited.
do we have some documentation about this?
the more detailed email on this topic was from Lukas:
http://www.mail-archive.com/internals@lists.php.net/msg43237.html


"Generally we have decided to leave Exceptions out of core with a few
"exceptions":

1) errors in the constructor will throw an exception
2) extensions may choose to offer an Exception mode (see PDO)

I never understood why we did 1), if a constructor can fail, then a factory
should be used instead. But oh well. With 2) you are obviously also opening
a pandoras box, that is similar to using a global error handler that turns
all Notices, Warnings etc as Exception: you can easily break code that calls
various libraries .. take for example passing in a PDO instance to one
library which expects the normal error mode and another one that enables the
Exception mode. For the most part however we can conclude that most
libraries enable the Exception mode in PDO and I think you will be hard
pressed to find any PDO code example that doesn't assume that the Exception
mode is enabled. "

every other mention about this topic is in-general prohibits the usage of
exceptions.
http://www.mail-archive.com/internals@lists.php.net/msg49637.html
http://www.mail-archive.com/internals@lists.php.net/msg44159.html

so I would like to know, that what is the current situation, and do these
mails still holds true.
maybe things has changed.

Tyrael

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