More on array references

<?php
function test(&$a) {}
test($x['foo']);
?>

Don't ask me, ever, why this doesn't throw a notice or two. It creates the $x array with a foo key assigned to NULL.

Comments

PHP is a loosely typed

PHP is a loosely typed language, that's why. It creates the $x array because it declares vars on the fly. Same with the foo key. Desired action.

?

$x['foo'] is accessed, not assigned in this case. $x['foo'] = 'bar' would be an assignment.

Accessing the undefined $x['foo'] should throw a PHP notice. The WTF is that PHP does not throw a notice, but silently declares $x['foo'] as NULL.

This is news? ;)

I've seen other people rely on this behavior and do it myself, too.

See lines 13 & 15 @ http://drupalcode.org/project/entity.git/blob/refs/heads/7.x-1.x:/module...

Among many others.

It's not different...

That's the exact same behavior.

A good counter question I can ask you is, how do you expect PHP to handle a 'NULL' reference without either throwing a fatal error right away, or segfaulting on assignment?

Seems like they made the right decision (IMO).

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