having 6 random numbers output different numbers

[cloudll]

Hey guys,

 

I need 6 different random numbers for my script, so i'm using mt_rand with a range of 1 - 100.

 

I was wondering if there was a way to make sure all 6 random numbers generated are different from each other?

 

Thanks

[Barand]

Array keys must be unique, so

$rand_nums = [];
while (count($rand_nums) < 6) {
    $rand_nums[mt_rand(1,100)] = 1;
}

The array keys will be your random numbers

Edited June 7, 2015 by Barand

[cloudll]

Thanks thats working great, so would I then use extract() to turn the 6 outputs into variables?

[Barand]

Put them in an array

$my_numbers = array_keys($rand_nums);

Then your variables as $my_numbers[0], $my_numbers[1], ... , $my_numbers[5]

[requinix]

You can avoid a loop with

$my_numbers = array_rand(array_flip(range(1, 100)), 6);

or the cleaner

$rand_nums = range(1, 100);
shuffle($rand_nums);
$my_numbers = array_slice($rand_nums, 0, 6);

There won't be much of a difference if you're only getting 6 numbers out of 100, but if you tried more like 6/7 or 90/100 then you'd notice a big one. Edited June 7, 2015 by requinix

[cloudll]

Thanks guys, really helped me a lot