How can I generate a random string, 20 characters long, A-Z (no lower case), 0-9 only?
I searched online but most scripts to do this are huge (50+ lines). Is there something simpler (maybe 1 line)?
2
-
Scrapping the answer I wrote as it was identical to the one linked here. Oh search boxes are heaven sentRottingham– Rottingham2014-01-13 18:51:02 +00:00Commented Jan 13, 2014 at 18:51
-
possible duplicate of Generating (pseudo)random alpha-numeric stringsMatthew Rapati– Matthew Rapati2014-01-13 23:20:57 +00:00Commented Jan 13, 2014 at 23:20
Add a comment
|
2 Answers
Will this suffice ?
<?php
echo strtoupper(substr(sha1(uniqid()),0,20));
OUTPUT :
A71463EA326B72981D21
answered Jan 13, 2014 at 18:50
Shankar Narayana Damodaran
68.6k43 gold badges102 silver badges129 bronze badges
2 Comments
Rottingham
Pretty wiz :-) Nice one
Sammitch
Only generates 0-9A-F, leaving out 20 of the 36 possible chars.
You could create a string with all the character you want that could be in the random string
$chars = 'ABCDEFG...0123456789';
and then create a for loop that picks a random letter or number in the chars string for 20 timer
$randstring = '';
$string_length;
for ($a = 0; $a < $string_length; $a++) {
$randstring .= $chars[rand(0, strlen($chars) - 1)];
}
Hope it helped!
1 Comment
Sammitch
Ticks all of the boxes, if I were the asker this is the answer I would accept.