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Re: Variable variables? [message #182269 is a reply to message #182261]

Fri, 26 July 2013 20:17

Christoph Michael Bec
Messages: 207
Registered: June 2013

Karma:

Senior Member

Scott Johnson wrote:

> if $parent is 'Women' I need to reference the array 'Women'

The concept of variable variables is quite simple:

$women = array(/* ... */);
$parent = 'women';
$$parent == $women; // TRUE

I don't consider this concept "sucky" per se, but I would recommend to
avoid overusing it, as it easily leads to unwieldy code due to its
dynamic nature:

$a = 1;
$b = 'a';
$c = 'b';
$$$c; // 1
$c = 'a';
$$$c; // Notice: Undefined variable: 1

However, sometimes it comes in quite handy, for instance:

foreach (array('foo', 'bar', 'baz') as $var) {
$$var = $_POST[$var];
}

--
Christoph M. Becker

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[Message index]

		Variable variables? By: Scott Johnson on Fri, 26 July 2013 02:56
		Re: Variable variables? By: Jerry Stuckle on Fri, 26 July 2013 10:56
		Re: Variable variables? By: Scott Johnson on Fri, 26 July 2013 19:39
		Re: Variable variables? By: Jerry Stuckle on Sat, 27 July 2013 13:48
		Re: Variable variables? By: Tim Streater on Sat, 27 July 2013 14:45
		Re: Variable variables? By: The Natural Philosoph on Sat, 27 July 2013 14:46
		Re: Variable variables? By: Tim Streater on Sat, 27 July 2013 14:53
		Re: Variable variables? By: Luuk on Fri, 26 July 2013 20:04
		Re: Variable variables? By: Scott Johnson on Sat, 27 July 2013 03:27
		Re: Variable variables? By: Christoph Michael Bec on Fri, 26 July 2013 20:17
		Re: Variable variables? By: Thomas 'PointedEars' on Sat, 27 July 2013 07:37

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