Topic: [SOLVED] Generate Randomized Alphanumeric String

[AndieB]

Hi all gurus!


I am off trying to see if I can create a ticket reservation system, where a visitor should be able to reserve tickets and get a randomized unique alphanumeric string in uppercase letters with a total of 8 characters.

I do not know how to create a script that randomizes letters, from A-Z, and puts it into a string only 8 characters long. To compare it with already stored "randomized" in a database, I guess it is only to do a search in the database.

Anyone who has a good advice or script on how to generate what I would like to achieve?
Example:
GUTIIKLE
YYTESVOP
PUERBHGA

I guess you all know what I am after.

Thankful for any kind of help!

Sincerely,
 Andreas

[micah1701]

first make an array of all the letters/numbers you want to use.  (if people will be typeing this string at somepoint I like to leave out the letter O and the number zero as well as the number 1 and letters like I and lowercase L)

then do a loop with 8 passes.

each time through the loop use rand() to pick a character out of your array and ad it to a string.

[effigy]

Code: [Select]

<pre>
<?php 
srand(time());
$pool = array_merge(
range('a', 'z'),
range('A', 'Z'),
range(0, 9)
);
$pool_size = count($pool) - 1;
for ($i = 0; $i < 8; $i++) {
echo $pool[rand(0, $pool_size)];
}
?>
</pre>


[AndieB]

Code: [Select]

<pre>
<?php 
srand(time());
$pool = array_merge(
range('a', 'z'),
range('A', 'Z'),
range(0, 9)
);
$pool_size = count($pool) - 1;
for ($i = 0; $i < 8; $i++) {
echo $pool[rand(0, $pool_size)];
}
?>
</pre>


Thank you very much!!
This solved it!