I could be wrong about this, but here goes:
Strings are in fact arrays. An array of characters. The code your
friend gave you manipulates this array in the same way that it would any
"normal" array. The only problem (not really a problem even) is that
when dealing with character-based arrays from strings, braces
("curlies") rather than brackets ("straights") should be used to delimit
the index of the array element from the variable name itself. In other
words, the correct syntax for your code would have been:
for($i=0; $i < $length; $i++) {
$key .= $pool{mt_rand(0,strlen($pool)-1)};
}
It's all explained on this page (check halfway down the page where it
says "String Access by Character"):
http://www.php.net/manual/en/language.types.string.php
Hope this helps clarify what you're seeing.
On Thursday, January 24, 2002, at 04:57 PM, v0idnull wrote:
> look at the for loop. $pool is not an array but is being treated as
> such and
> the key happens to be the position in $pool and it'll take that letter
> and
> save it to $key.
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