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__autoload() and class_exists()

php.internals

Stephan Schmidt

21 years ago

Hi,

I just found this strange behaviour in PHP5:

When using class_exists() to test, whether a class exists, the magic
function __autoload() is called:

function __autoload($class)
{
echo "Trying to load $class\n";
}

if (!class_exists('DB')) {
echo "DB does not exist.\n";
}

You'll get:

Trying to load DB
DB does not exist.

Is this a bug or the desired behaviour? It's pretty annoying, when you
are trying to use __autoload() as a fallback if a class could not be
loaded from directories defined by the user...

Best regards,

Stephan

--
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http://www.schst.net
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Marcus Börger

21 years ago

Hello Stephan,

Tuesday, February 22, 2005, 8:59:27 PM, you wrote:

> Hi,

> I just found this strange behaviour in PHP5:

> When using class_exists() to test, whether a class exists, the magic
> function __autoload() is called:

Expected behavior that can be changed:

proto bool class_exists(string classname [, bool autoload])

"RTFM" or is it undocumented?

Best regards,
Marcus                            mailto:helly@php.net

Stephan Schmidt

21 years ago

Hi,

Marcus Boerger schrieb:

> Expected behavior that can be changed:
>
> proto bool class_exists(string classname [, bool autoload])
>
> "RTFM" or is it undocumented?

Ooops, didn't check the manual for class_exists() in the last months...

Stephan

--
http://www.php-tools.net
http://www.schst.net
http://pear.php.net