On 12/21/2012 7:59 PM, Nathan Nobbe wrote:
On Fri, Dec 21, 2012 at 4:10 PM, Nathan Nobbe <quickshiftin@xxxxxxxxx>wrote:
On Fri, Dec 21, 2012 at 3:27 PM, Jim Giner <jim.giner@xxxxxxxxxxxxxxxxxx>wrote:
On 12/21/2012 5:16 PM, Tedd Sperling wrote:
On Dec 21, 2012, at 4:58 PM, Jim Giner <jim.giner@xxxxxxxxxxxxxxxxxx>
wrote:
Never realized that you could address a string as an array of chars,
which you are doing. Could that be the issue? Or did I learn something
new? Or should you have used substr to remove that last char?
Jim:
I guess you learned something new -- that's good.
A string is just a "string" of chars.
As such, if you define:
$a = "tedd";
then:
$a[0] is 't';
$a[1] is 'e'
$a[2] is 'd'
$a[3] is 'd'
The only confusing thing here is the length of the string -- in this
case the length of this string is four, but $a[4] has not been defined.
Cheers,
tedd
_____________________
tedd@xxxxxxxxxxxx
http://sperling.com
From what I do know, there shouldn't be an a[4].
In any case, let's assume that there is a bug in the string logic that
you're using. Why not just use substr?
$topic = substr($topic,0,-1);
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Neat idea Tedd, but judging by a quick test, I don't think changing the
value of the string is entirely supported though that notation.
php > $str = 'blah';
php > $str[3] = '';
php > echo $str . PHP_EOL;
bla
php > echo strlen($str);
4
Another interesting twist along the same lines, seems the string offsets
are indeed read only:
php > unset($str[3]);
Fatal error: Cannot unset string offsets in php shell code on line 1
Call Stack:
6665.6475 384568 1. {main}() php shell code:0
-nathan
That actually makes sense tho. Afterall, a string is truly only one
memory allocation whereas array elements are basically multiple vars
having the same name. So - how can you unset one char in a string?
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