DaniWeb Forum Index > Web Development > PHP

PHP random number check

Please support our PHP advertiser: PostgreSQL or MySQL? Compare and contrast the two most popular open source databases

•

Join Date: Sep 2008

Posts: 138

Reputation: rajeesh_rsn is an unknown quantity at this point

Solved Threads: 0

rajeesh_rsn rajeesh_rsn is offline

Offline

Junior Poster

PHP random number check

Aug 8th, 2009

Hai,

I had a small doubt in my php script.
I need to select 10 random numbers from a range ( for eg: 2-88) and stored it in an array.
For eg:
$number=rand(2,88); This returns only one value from the range 2-88. I need 15 random numbers from the given range and also I need 15 different numbers and finally stored it in an array. ie $number[1],$number[2] .......

Please help me .... Thanks in Advance
Rajeesh

•

Join Date: Jul 2007

Posts: 169

Reputation: tuse is an unknown quantity at this point

Solved Threads: 14

tuse

Offline

Junior Poster

Re: PHP random number check

Aug 8th, 2009

1. Keep an array to hold the random numbers

2. In order to add an element to this array, generate a random number in the required range, and check the array to see if the generated number is already a part of the array (using foreach)

3. If the generated random number is not a part of the array, append it to the array, else goto step 2.

4. Finish the algorithm when the array holds 15 elements

----

Alternatively, you can use 'in_array()' to check if a value exists in an array

http://www.w3schools.com/PHP/func_array_in_array.asp

My blog on .NET- http://dotnet.tekyt.info

•

Join Date: Aug 2009

Posts: 4

Reputation: rajesh_kanna is an unknown quantity at this point

Solved Threads: 0

rajesh_kanna rajesh_kanna is offline

Offline

Newbie Poster

Re: PHP random number check

-1

Aug 8th, 2009

This code will help you in retrieving 15 random numbers and storing them in an array,.....

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php 
 $j = 0;
 $data = array();
 while($j < 15)
 {
  $value = rand(2,88);
  if(!(in_array($value,$data))) 
  { $j = $j + 1;
  $data[$j] = $value; }
 }
foreach($data as $keys)
{ echo $keys."<br>"; }
 ?>
<?php 
 $j = 0;
 $data = array();
 while($j < 15)
 {
  $value = rand(2,88);
  if(!(in_array($value,$data))) 
  { $j = $j + 1;
  $data[$j] = $value; }
 }
foreach($data as $keys)
{ echo $keys."<br>"; }
 ?>

You use this code to get 15 random numbers and you code to select 10 nums as you wish,..

Last edited by peter_budo; Aug 9th, 2009 at 8:23 am. Reason: Keep It Organized - For easy readability, always wrap programming code within posts in [code] (code blocks) and [icode] (inline code) tags.