Description:
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As http://bugs.php.net/bug.php?id=41195 requested http://de2.php.net/language.types.string now mentions, accessing other types than strings, arrays or objects using the [] operator silently returns NULL.

This behavior hides bugs. There is no sensible reason to use [] on a other types than mentioned, so it should result in an error. It would make sense to trigger an E_NOTICE. However, to be gentle to backwards compatibility it could also trigger an E_STRICT instead.

The "expected result" below is only an example of a possible message.

Reproduce code:
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$o = NULL;
var_dump($o[0]);

Expected result:
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Notice: Undefined offset: 0 for value of type NULL
NULL

Actual result:
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NULL