PHP - Mt_rand Is Producing The Same Number Instead Of Randomizing

Hello Everyone,   I am working on a little project, which is basically creating a lottery draft order for our fantasy football league (I know uber cool right? lol).   I'm basically trying to mimic the old NBA draft lottery by doing something like the following:   Say our league has 12 teams and I want to weight each players chance of getting that 1st pick in the draft?     Well I would give the worst player 12 chances out of 78, 2nd to last 11 chances out of 78 etc.   So I basically created an array with values 1-78 to be my overall chances and some other arrays to assign numbers to each team member i.e. 1-12 to last place, 13-23 for send to last etc.   and I was planning to do a while loop and array_diff to narrow down the chances.  here is what i have thus far:

while($x <= 12){

    $num = $adjusted[mt_rand(0,count($adjusted)-1)];
    
    Switch($num){
        
        case in_array($num,$place12):
        
            echo $x + ' ' + 'Player12';
        
            $adjusted = array_diff($adjusted,$place12);
            
            $x++;
        break;
        
        case in_array($num,$place11):
        
            echo $x + ' ' + 'Player11';
        
            $adjusted = array_diff($adjusted,$place11);
        
            $x++;
        break;
        
        case in_array($num,$place10):
        
            echo $x + ' ' + 'Player10';
        
            $adjusted = array_diff($adjusted,$place10);
        
            $x++;
        break;
        
        case in_array($num,$place9):
        
            echo $x + ' ' + 'Player9';
        
            $adjusted = array_diff($adjusted,$place9);
        
            $x++;
        break;
        
        case in_array($num,$place8):
        
            echo $x + ' ' + 'Player8';
        
            $adjusted = array_diff($adjusted,$place8);
        
            $x++;
        break;
        
        case in_array($num,$place7):
        
            echo $x + ' ' + 'Player7';
        
            $adjusted = array_diff($adjusted,$place7);
        
            $x++;
        break;
        
        case in_array($num,$place6):
        
            echo $x + ' ' + 'Player6';
        
            $adjusted = array_diff($adjusted,$place6);
        
            $x++;
        break;
        
        case in_array($num,$place5):
        
            echo $x + ' ' + 'Player5';
        
            $adjusted = array_diff($adjusted,$place5);
        
            $x++;
        break;
        
        case in_array($num,$place4):
        
            echo $x + ' ' + 'Player4';
        
            $adjusted = array_diff($adjusted,$place4);
        
            $x++;
        break;
        
        case in_array($num,$place3):
        
            echo $x + ' ' + 'Player3';
        
            $adjusted = array_diff($adjusted,$place3);
        
            $x++;
        break;
        
        case in_array($num,$place2):
        
            echo $x + ' ' + 'Player2';
        
            $adjusted = array_diff($adjusted,$place2);
        
            $x++;
        break;
        
        case in_array($num,$place1):
        
            echo $x + ' ' + 'Player1';
        
            $adjusted = array_diff($adjusted,$place1);
        
            $x++;
        break;
        
        default:
        
            $adjusted = $lottery;

        break;
}               
}

Just starting out on the project so it's still pretty basic.  Just trying to work on functionality right now.  I am getting an undefined offset error which i assume is related to the way i'm doing and storing the mt_rand value.     any thoughts on how i might fix it?

Code: [Select]
function choose_numbers($number,$max) {
global $ibforums,$std;
srand( (double)microtime() * 1000000 );
$array = array();
$i = 0;
while($i!=$number)
{
$array[] = mt_rand(1,$max);
$i++;
}
$c = count($array);
while($c != $number)
{
$array[] = mt_rand(1,$max);
$c = count($array);
if($c == $number)
{
$array = array_unique($array);
$c = count($array);
}
}
return $array;
}
$newnumbers = $this->choose_numbers(3,36);
echo "{$newnumbers['0']}|{$newnumbers['1']}|{$newnumbers['2']}";

This echo's out my lottery balls 0|32|22 or technically RANDNuMbER|RANDNUMBER|RANDNUMBER

up to 36 is the highest number.

Now my issue is, I don't want 2 numbers of the same Value, EVER. Sometimes it does 2|3|2 which is BAD (for my lottery system) is there anyway I can make it so it never will echo out 2 (OR 3) of the same number?

Although I found a way around it, I want to know, logically, why the behavior is so.



// words.txt is a text file with dictionary words on each line
$lines = file('words.txt');

// The goal is to pick two random words, 10 times.
for($i = 0; $i < 10; $i++) {

#shuffle($lines); <--- un-commenting this is the fix i found.

$words = array_rand($lines, 2);

echo "Words: " . $lines[$words[0]] . ", " . $lines[$words[1]] . "<br>";
}

If i don't have shuffle() in there, I get two different set of words, not 10. ie (result from code above)

Words: massacre , spear
Words: frontiersman , kumquat
Words: massacre , spear
Words: frontiersman , kumquat
Words: massacre , spear
Words: frontiersman , kumquat
Words: massacre , spear
Words: frontiersman , kumquat
Words: massacre , spear
Words: frontiersman , kumquat


Why is this?

Hi Guys

I was just wondering if their is a function to randomize an array pulled from database is it possible i know their is array_rand() but it doesnt seem to work for me can someone show me where i am going wrong or do i have to do it from the actual SELECT statemant i.e ORDER_RAND(); ?

Here is what my array prints out.



 $user_list = get_users_by_specialism($specialism);

print_r($user_list);

outputs.

Array ( [0] => 129 [1] => 46 [2] => 57 [3] => 109 [4] => 92 [5] => 137 [6] => 238 [7] => 101 [8] => 60 [9] => 90 [10] => 112 [11] => 133 [12] => 121 [13] => 220 [14] => 275 [15] => 278 ) 



I basically need to make this array output in a random order everytime not by ID incrementing.

Any help Please

Cheers.

I'm currently working on a browser based mmorpg. First things first, here is an example of my battle.php

<?php
include_once 'connect.php';
session_start();

include_once 'logo.php';
?>
<link href="style.css" rel="stylesheet" type="text/css" />
<div id="login2" div align="center">


<?php




if (isset($_SESSION['player']))
{
  $player=$_SESSION['player'];
}
else
{
  echo "Not Logged in <br><br> <A href='login.php'>Login</a>";
  exit;
}
?>
</div>
<?php
$playerinfo="SELECT * from players where name='$player'";
$playerinfo2=mysql_query($playerinfo) or die("could not get player stats!");
$playerinfo3=mysql_fetch_array($playerinfo2);

include_once 'statpanel.php';

$pid = $playerinfo3['id'];
$name = $playerinfo3['name'];
$playerhp = $playerinfo3['hpoints'];
$playerattack = $playerinfo3['attack'];
$playerdefense = $playerinfo3['defense'];

if ($playerhp < 1)
{
  echo "You are dead!" ;
  echo "<br><a href='inn.php>Heal at the lake";
  exit;
}
?>
<div id="table">

<?php

if (isset($_GET['randid']))
{
   $randid=$_GET['randid'];
   $iteminfo="SELECT * from inventory where randid='$randid' AND id ='$pid'";
$iteminfo2=mysql_query($iteminfo) or die("could not get item stats!");
$iteminfo3=mysql_fetch_array($iteminfo2);

if (!$iteminfo3['name'])
{
}
else
{

$iname = $iteminfo3['name'];
$stats = $iteminfo3['stats'];
$statadd = $iteminfo3['statadd'];
$type = $iteminfo3['type'];

if ($type == "healing")
{
   $newhp = $statadd + $playerhp;
   if ($newhp > $playerinfo3['maxhp'])
   {
    $newhp = $playerinfo3['maxhp'];
   }
    $updateplayer="update players set hpoints='$newhp' where id='$pid'";
  mysql_query($updateplayer) or die("Could not update player");

    $updateitem="DELETE from inventory where id='$pid' AND randid='$randid' limit 1";
  mysql_query($updateitem) or die("Could not delete item");
   
   $playerhp = $newhp;
 
  echo "Used " . $iname . " and recovered " . $statadd . ".<br>";
}

}}





$creature = $playerinfo3['creature'];
if ($creature != 0)
{
$creatureinfo="SELECT * from creatures where id='$creature'";
$creatureinfo2=mysql_query($creatureinfo) or die("could not get the creature you were fighting!");
$creatureinfo3=mysql_fetch_array($creatureinfo2);

}
else
{
  $creatureinfo="SELECT * from creatures order by rand() limit 1";
$creatureinfo2=mysql_query($creatureinfo) or die("could get a creature!");
$creatureinfo3=mysql_fetch_array($creatureinfo2);
$cid = $creatureinfo3['id'];
$updateplayer="update players set creature='$cid' where name='$name'";
  mysql_query($updateplayer) or die("Could not update player");
}

$creature = $creatureinfo3['name'];
$creaturehp = $creatureinfo3['hpoints'];
$creatureattack = $creatureinfo3['attack'];
$creaturedefense = $creatureinfo3['defense'];



?>
</div>
<div id="player">
<?php
/////player info
echo "<u> " . $playerinfo3['name'] . "</u><br>";
echo "Hit points = " . $playerhp . "<br>";
echo "Attack = " . $playerattack . "<br>";
echo "Defense = " . $playerdefense . "<br><br><br>";
?>
</div>
<div id="creature">
<img src="images/<?php echo $creatureinfo3['imgurl'];?>" <br>
<?php
///////creature info

echo "<u> " . $creatureinfo3['name'] . "</u><br>";
echo "Hit points = " . $creaturehp . "<br>";
echo "Attack = " . $creatureattack . "<br>";
echo "Defense = " . $creaturedefense . "<br><br><br>";
 ?>
 </div>

<div id="options">
<?php
echo "<a href='attack.php'>Attack</a>";
echo "<br><a href='usemagic.php'>Use Magic</a>";
echo "<br><a href='useitem.php'>Use Item</a>";
echo "<br><a href='index.php'>Exit Arena</a>";


?>
</div>

<div id="logout">
<?php
echo "<br><a href='logout.php'><img src='images/logout.gif'>";
?>
</div>


Particular functions I'm interested in for zone creation.

-Pay to get in & have the initial icon switch to a now usable adventure zone. (done)

-When 'adventuring' in this link. Battle php randomizes encounters between 'combat encounters' and 'non-combat' encounters.  (can't get this right, and removed my utter failures from the code above as to not clutter it. Pulls randomly from the Creature DB just fine but when I try to add in the 2nd,non-combat,db..it pulls nothing.)

-NonCombat encounters dish our reward. (currently my non combats do not give reward. Unlike a standard creature encounter where a players gold and exper get updated on a victory...I dont know how to immediately trigger the change on encounter & I'm epically unsure how to craft the $updateplayer= to be so broad as to include all possibilities of improvement but only to utilize the one being called upon in the encounter)

-I'm also interested in updating my battle.php to include a dropdown list of usable spells/items instead of the current method of Attacking/going back/selecting magic or items/going back/...repeat. It works, sure, but its nasty..Any ideas on how to call on the database for user specific data to fill in a drop down menu?