$data = array(array('somedata'=>'somevalue','somedata2'=>'somevalue2'),array('somedata'=>'somevalue','somedata2'=>'somevalue2'),array('somedata'=>'somevalue','somedata2'=>'somevalue2'));
function getdata($key){
return $GLOBALS['data'][$key];
}
But what if some entries in the array should be aliases of others? Using a recursive function, it's simple:
$data = array(array('somedata'=>'somevalue','somedata2'=>'somevalue2'),'ALIAS0',array('somedata'=>'somevalue','somedata2'=>'somevalue2'),array('somedata'=>'somevalue','somedata2'=>'somevalue2'));
function getdata($key){
if(!is_array($GLOBALS['data'][$key])){
preg_match('/^ALIAS([0-9]+)$/',$GLOBALS['data'][$key],$matches);
return getdata($matches[1]);
}else{
return $GLOBALS['data'][$key];
}
}
The array could be fetched inside of the if block, but that would make for longer code, harder to change code, and aliases of aliases would be impossible to have.
Roberto Plomp wrote:
If you mean that it would be more straight forward, hence neater and more
comprehensive and more maintenance and stack friendly to just call the
function in a loop, I agree.
On the other hand ... well, there are arguments for the recursive approach
for a number of algorithms.
Personally I prefer not to use recursive functions, have never really seen
the absolute necessity to do so.
Roberto
----- Original Message -----
From: "Jason Wong" <php-db@gremlins.biz>
Subject: Re: Calling functions recursively
On Saturday 25 January 2003 14:49, Kevin Gordon wrote:
Can functions / methods be called recursively? If so how can this begoogle > "php recursive functions"
done? Comments much appreciated.
--
Jason Wong -> Gremlins Associates -> www.gremlins.biz
Open Source Software Systems Integrators
* Web Design & Hosting * Internet & Intranet Applications Development *
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