This function returns an array of unique random numbers. It works just like PHP's rand() with an extra argument for the count of the returned array.
**Update: Added error checking and an optional 4th argument to set the length of the returned numbers.
By : tr4nc3
<?php
# Multiple Unique Random Numbers
#
# array mrand ( int min, int max, int count [, int strlen ] )
function mrand($l,$h,$t,$len=false){
if($l>$h){$a=$l;$b=$h;$h=$a;$l=$b;}
if( (($h-$l)+1)<$t || $t<=0 )return false;
$n = array();
if($len>0){
if(strlen($h)<$len && strlen($l)<$len)return false;
if(strlen($h-1)<$len && strlen($l-1)<$len && $t>1)return false;
do{
$x = rand($l,$h);
if(!in_array($x,$n) && strlen($x) == $len)$n[] = $x;
}while(count($n)<$t);
}else{
do{
$x = rand($l,$h);
if(!in_array($x,$n))$n[] = $x;
}while(count($n)<$t);
}
return $n;
}
## Samples ##
if(!$numbers = mrand(1000,9999,10,4))die("error");
// 20 random, all 7 chars in length
# $numbers = mrand(0,9999999,20,7);
// 20 random, length doesn't matter
# $numbers = mrand(0,9999999,20);
# $numbers = mrand(8000,10000,1,5) // ok
# $numbers = mrand(8000,10000,2,5) // error
# $numbers = mrand(120,100,20); // ok
# $numbers = mrand(100,120,21); // ok
# $numbers = mrand(120,100,21); // ok
# $numbers = mrand(120,100,22); // error
# $numbers = mrand(100,120,22); // error
# $numbers = mrand(120,120,1); // ok
# $numbers = mrand(120,120,2); // error
# $numbers = mrand(120,120,0); // error
# $numbers = mrand(1000000,9999999,3000);
// Sort the array
# sort($numbers);
// Display the array
echo '<pre>';
print_r($number);
echo '</pre>';
?>
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