Random Num Generator

[mariomtti]

Hi All,

Looking to create a rand num generator between 0-21 - without duplicates...

I can create the generator part but the random part if where I'm falling...

<?php
$min=0;
$max=21;
echo rand($min,$max);
?>

Any ideas?
Thanks,
Mario

[laserlight]

Basic idea is to generate numbers within the range, then shuffle:

<?php

$numbers = range(0, 21);
shuffle($numbers);
foreach ($numbers as $number) {
    echo $number . "<br/>\n";
}

[sneakyimp]

I had no idea [man]shuffle[/man] existed! I've reinvented this wheel soooo many times.

[dalecosp]

mariomtti;11054689 wrote:

Hi All,

Looking to create a rand num generator between 0-21 - without duplicates...

I can create the generator part but the random part if where I'm falling...

<?php
$min=0;
$max=21;
echo rand($min,$max);
?>

Any ideas?
Thanks,
Mario

That IS a random number generator ... although [man]random_int/man is the "cryptographically secure" version.

without duplicates

Of course, what you mean is, "I want to create a generator for an array of random numbers..."

Because one number cannot have a duplicate if it's just one number.

Of course, laserlight's back from Japan and has it cold on the first post. 😉

There's also an [man]array_rand/man that gives a pseudo-random array, if that is more what you're looking to do.

Welcome to PHPBuilder Mario, and please consider using [noparse]

[/noparse] tags around your PHP code in your next post! 🙂

sneakyimp wrote:

I had no idea shuffle existed! I've reinvented this wheel soooo many times.

It's a Revelation Moment, ain't it? IIRC, Weedpacket introduced me to that one [thread=10215875]umpteen years ago right here on PHPBuilder[/thread]....