Random in array????

[Eagle710]

I have an array where i have placed a bunch on rand() generated numbers.. im trying to figure out a way to go through the array and check to see if there are duplicates if so i would like a number re generated. Any help?

[kenrbnsn]

Why don't you check when putting the random number into the array?

 

<?php
$rn = array();
for ($i=0;$i<100;$i++) {
    $tst = rand(1,1000);
    while (in_array($tst,$rn)) {
        echo $tst . ' is already in the array<br>';  // debug -- check
        $tst = rand(1,1000);
    }
    $rn[$i] = $tst;
}
echo '<pre>' . print_r($rn,true) . '</pre>';
?>

 

Ken

[priti]

Before inserting the new random number simplY check USING  - in_array($arr,$new_random_num).if it return true select another random number and proceed.

 

Regards

[mainewoods]

php provides an array function for just that:

http://www.php.net/manual/en/function.array-unique.php

 

// one line solution
$myunique = array_unique($myarray);

[kenrbnsn]

I don't think that will work in this case, since it reduces the size of the array if there are duplicates.

 

Ken