Arrays

Random array

Type:	code fragment
Added by:	DamienMcE
Entered:	08/03/2002
Last modified:	03/12/2001
Rating:	- (fewer than 3 votes)
Views:	5116

This may save someone 5 minutes. A little function that generates an array of unique random integers.

<?php
function randarray ($max)

                            {

                                 srand((double) microtime() * 1000000);

                                 $count =0; 

                                 $currentnum=0;

                                 $randomnumbers= array();

                                 while ($count<$max)

                                     {

                                    $currentnum=rand (0,$max);    

                                    

                                     if (!in_array($currentnum,$randomnumbers))

                                    

                                        {

                                        $randomnumbers[$count]=$currentnum;

                                        $count++;

                                        }            

                                    }                

                                 return $randomnumbers; 

                            }
?>

Usage Example

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