note 111004 added to function.rand
| From: | kokuswolf at pireality dot de | Date: | Fri, 04 Jan 2013 14:02:35 +0000 |
| Subject: | note 111004 added to function.rand | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-192763@lists.php.net to get a copy of this message | ||
In addition to the slightly outdated two posts below here some actual results with PHP 5.4.10.
Unix rand() inferiority (171.08 ms):
Array
(
[0] => 5
[1] => 10
[2] => 8
[3] => 9
[4] => 9
[5] => 13
[6] => 13
[7] => 5
[8] => 15
[9] => 10
[10] => 10
)
Unix mt_rand() inferiority (170.96 ms):
Array
(
[0] => 6
[1] => 8
[2] => 14
[3] => 12
[4] => 12
[5] => 8
[6] => 9
[7] => 10
[8] => 9
[9] => 12
[10] => 11
)
And some shorter and quicker way of generating random chars:
<?php
function randchars($num, $charset = 'abcdefghijkmnopqrstuvwxyz0123456789'){
$charrange = strlen($charset)-1;
$string = '';
for($i=1; $i<=$num; $i++){
$string .= $charset[mt_rand(0, $charrange)];
}
return $string;
}
echo randchars(12); // 0t89r9y64oqv
echo randchars(8, 'abcdef'); // afeddcad
?>
----
Server IP: 69.147.83.199
Probable Submitter: 217.91.162.102
----
Manual Page -- http://php.net/manual/en/function.rand.php
Edit -- https://master.php.net/note/edit/111004
Del: integrated -- https://master.php.net/note/delete/111004/integrated
Del: useless -- https://master.php.net/note/delete/111004/useless
Del: bad code -- https://master.php.net/note/delete/111004/bad+code
Del: spam -- https://master.php.net/note/delete/111004/spam
Del: non-english -- https://master.php.net/note/delete/111004/non-english
Del: in docs -- https://master.php.net/note/delete/111004/in+docs
Del: other reasons-- https://master.php.net/note/delete/111004
Reject -- https://master.php.net/note/reject/111004
Search -- https://master.php.net/manage/user-notes.php