Random Number

[The Little Guy]

I am trying to get a random number between 20 and 50, or between -20 and -50. This is how I am doing it, is there an easier way to do it?

 

// Create a random swirl
$arr1 = range(20, 50);
$arr2 = range(-50, -20);
$arr3 = array_merge($arr1, $arr2);
$swirl = $arr3[array_rand($arr3)];

[Andy-H]

rand ?

 

//Edit, ahh I get you, ignore me haha

[The Little Guy]

That is only between two number I want between 4 numbers.

[Andy-H]

Duno if either are 'better' but they both do the job.

 

$arr = range(-50, 50);
$arr = array_filter($arr, create_function('$num', 'if ($num > -20 && $num < 20) return false; return true;'));
shuffle($arr);

echo $arr[0];

 

$options['options']['min_range'] = -20;
$options['options']['max_range'] = 20;

$done = false;

do
{
   $rand = mt_rand(-50, 50);
   
   if (filter_var($rand, FILTER_VALIDATE_INT, $options) !== false)
      $done = true;
      
}while (!$done);

[kenrbnsn]

The OP's first attempt was pretty good. Here's how I would do it:

<?php
$arr = array_merge(range(-50,-20),range(20,50));
shuffle($arr);
$your_rand = $arr[0];
echo $your_rand;
?>

 

Ken

[The Little Guy]

ken I like your method, it is shorter...

 

I will use that unless someone has a better solution!

 

Thank You!

[Psycho]

I've got a solution that takes only two lines

$no = rand (1, 62);
$no = ($no<32) ? ($no-51) : ($no-12);

[sw0o0sh]

Get into the habit of using mt_rand() instead btw

[Andy-H]

I've got a solution that takes only two lines

$no = rand (1, 62);
$no = ($no<32) ? ($no-51) : ($no-12);

 

Nice

[Psycho]

One line, using mt_rand():

$no = (mt_rand(0,1)) ? mt_rand(20, 50) : mt_rand(-50, -20);