| Re: foreach problem part two [message #184295 is a reply to message #184292] |
Fri, 20 December 2013 15:35   |
Thomas 'PointedEars'
Messages: 701
Registered: October 2010
Karma:
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Senior Member |
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Norman Peelman wrote:
> This is not 100% legal syntax because the second [0] acts as a string
> offset instead of an index:
>
> $alist[0][0] = "data";
> Fatal error: Cannot use string offset as an array... you must use
> *array()* to set these up.
Unsurprisingly, utter nonsense from you again.
$ php -r '$a[0] = 42; var_dump($a["0"]);'
int(42)
In fact,
$alist[0][0] = "data";
is equivalent to
$alist = array(array("data"));
or
$alist = array(0 => array("data"));
or
$alist = array(array(0 => "data"));
or
$alist = array(0 => array(0 => "data"));
or variations of that where the key is the string '0' or "0", if $alist did
not exist before.
It is equivalent to
$alist[0] = array("data");
and variations of that, including those where the keys are '0', if $alist
existed before but did not have an element with key 0.
And it is equivalent to itself if $alist[0] referred to an array before
(i.e., it modifies the element with index 0 of the array that is the element
with index 0 of the outer array).
That you can create „multi-dimensional“ arrays, which can even be
associative, with just one line, is the beauty of PHP.
PointedEars
--
realism: HTML 4.01 Strict
evangelism: XHTML 1.0 Strict
madness: XHTML 1.1 as application/xhtml+xml
-- Bjoern Hoehrmann
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