rand() filter??

[mrbean]

Hi there,

 

I have one question about the function rand(),

 

What if i want to have an number between 0 and 360

 

Without 90 to 180

 

so 91,92,93,94.....180 can't be the number

 

how can i do that?

 

btw, I know its possible through if,while,for and so on. But is there an other way to do this?

[.josh]

I guess one way to do it:

 

$range = array_merge(range(0,89),range(181,360));
$number = $range[array_rand($range)];
echo $number;

 

[mrbean]

It works but can u explain what it does (detailed )?

So i can do it myself.

 

thanks.

[gizmola]

There's no magic solution.  CV has a cool approach.  You could also write a quick function like this.  Rather than asking for explanations of how these work, try reading about the functions used in the php manual.  They are well documented.

 

function getRand() {
  $x = rand(0, 270);
  if ($x > 89 && $x     $x += 180;
  return $x;
}

[fugix]

$range = array_merge(range(0,89),range(181,360));
$number = $range[array_rand($range)];
echo $number;

 

what crayon did there is he created 2 arrays with the min and max so that they excluded the numbers that you want to exclude using the range() function, then he merged those two arrays using the array_merge() function. then using the array_rand() function, this chooses a random number from the array that he merged. then he echoes the chosen number. Not sure if this is what you wanted from an explanation..

[mrbean]

thanks for explaining fugix and thanks for the advice gizmola.

What i am gonna do is make an function of it and use it multiple times for my captcha script