CODEWITHSUNDEEP
php
jason5137715
jason5137715

Reputation: 117

Make random numbers less random in php

I'm trying to echo random numbers in php. I'm using this method below

<?php
echo mt_rand(10, 100)." Users Online";
?>

It works but my problem is: I want to make the numbers less random when someone refresh the page, for example:

11 refresh
12 refresh
10 refresh
40 refresh
42 refresh
40 refresh
38 refresh

The code that I use give random numbers, but I want the random numbers to jump in small numbers but not like jumping from 20 to 100!

Is there any simple way to achieve this?

Upvotes: 1

Views: 103

Answers (4)

user2560539
user2560539

Reputation:

This example eliminates a little bit what you describe in your question, it want jump from 20 to 100 very often but it could happen.

$limit = mt_rand(10,20);
$diff = mt_rand(20,80);
echo mt_rand(mt_rand($limit-$diff>0?$limit-$diff:0, $limit), mt_rand($limit, 
$limit+$diff))." Users Online";

You could try it out in PHP Sandbox The first 1000 results are:

15 Users Online
8 Users Online
11 Users Online
28 Users Online
19 Users Online
27 Users Online
6 Users Online
15 Users Online
17 Users Online
14 Users Online
24 Users Online
16 Users Online
38 Users Online
38 Users Online
9 Users Online
17 Users Online
31 Users Online
44 Users Online
23 Users Online
29 Users Online
14 Users Online
17 Users Online
11 Users Online
21 Users Online
69 Users Online
16 Users Online
28 Users Online
18 Users Online
31 Users Online
20 Users Online
23 Users Online
27 Users Online
25 Users Online
15 Users Online
15 Users Online
12 Users Online
5 Users Online
27 Users Online
15 Users Online
12 Users Online
30 Users Online
18 Users Online
10 Users Online
7 Users Online
19 Users Online
38 Users Online
20 Users Online
17 Users Online
5 Users Online
32 Users Online
17 Users Online
21 Users Online
36 Users Online
36 Users Online
24 Users Online
5 Users Online
20 Users Online
26 Users Online
29 Users Online
56 Users Online
20 Users Online
29 Users Online
26 Users Online
16 Users Online
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21 Users Online
15 Users Online
13 Users Online
52 Users Online
16 Users Online
10 Users Online
34 Users Online
31 Users Online
15 Users Online
31 Users Online
6 Users Online
11 Users Online
37 Users Online
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28 Users Online
15 Users Online
8 Users Online
10 Users Online
43 Users Online
16 Users Online
24 Users Online
31 Users Online
63 Users Online
12 Users Online
20 Users Online
16 Users Online
19 Users Online
19 Users Online
33 Users Online
23 Users Online
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9 Users Online
19 Users Online
16 Users Online
13 Users Online
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8 Users Online
14 Users Online
42 Users Online
40 Users Online
21 Users Online
44 Users Online
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13 Users Online
62 Users Online
17 Users Online
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10 Users Online
26 Users Online
14 Users Online
37 Users Online
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23 Users Online
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24 Users Online
18 Users Online
15 Users Online
51 Users Online
23 Users Online
58 Users Online
32 Users Online
40 Users Online
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15 Users Online
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22 Users Online
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24 Users Online
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30 Users Online
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18 Users Online
13 Users Online
31 Users Online
25 Users Online
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30 Users Online
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23 Users Online
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25 Users Online
10 Users Online
29 Users Online
16 Users Online
20 Users Online
19 Users Online
13 Users Online
21 Users Online
35 Users Online
23 Users Online
17 Users Online
36 Users Online
31 Users Online
11 Users Online
24 Users Online
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27 Users Online
8 Users Online
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8 Users Online
63 Users Online
27 Users Online
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4 Users Online
48 Users Online
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16 Users Online
39 Users Online
8 Users Online
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10 Users Online
2 Users Online
8 Users Online
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28 Users Online
27 Users Online
64 Users Online
30 Users Online
32 Users Online
31 Users Online
54 Users Online
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17 Users Online
31 Users Online
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48 Users Online
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33 Users Online
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37 Users Online
33 Users Online
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21 Users Online
62 Users Online
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30 Users Online
17 Users Online
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40 Users Online
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47 Users Online
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27 Users Online
41 Users Online
17 Users Online
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15 Users Online
31 Users Online
35 Users Online
42 Users Online
12 Users Online
62 Users Online
54 Users Online
44 Users Online
45 Users Online
31 Users Online
59 Users Online
9 Users Online
11 Users Online
20 Users Online
18 Users Online
24 Users Online
23 Users Online
33 Users Online
13 Users Online
8 Users Online
6 Users Online
26 Users Online
5 Users Online
12 Users Online
9 Users Online
24 Users Online
22 Users Online
13 Users Online
19 Users Online
27 Users Online
12 Users Online
26 Users Online
10 Users Online
18 Users Online
19 Users Online
41 Users Online
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45 Users Online
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78 Users Online
10 Users Online
31 Users Online
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13 Users Online
53 Users Online
19 Users Online
26 Users Online
11 Users Online
41 Users Online
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42 Users Online
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61 Users Online
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13 Users Online
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17 Users Online
32 Users Online
19 Users Online
24 Users Online
13 Users Online
33 Users Online
9 Users Online
7 Users Online
11 Users Online
38 Users Online
29 Users Online
19 Users Online
15 Users Online
10 Users Online
11 Users Online
8 Users Online
17 Users Online
42 Users Online
18 Users Online
15 Users Online
12 Users Online
6 Users Online
27 Users Online
24 Users Online
16 Users Online
43 Users Online
46 Users Online
9 Users Online
28 Users Online
54 Users Online
15 Users Online
23 Users Online
12 Users Online
5 Users Online
19 Users Online
21 Users Online
13 Users Online
5 Users Online
31 Users Online
16 Users Online
22 Users Online
36 Users Online
41 Users Online
31 Users Online
15 Users Online
19 Users Online
12 Users Online
42 Users Online
25 Users Online
24 Users Online
6 Users Online
31 Users Online
22 Users Online
34 Users Online
9 Users Online
9 Users Online
11 Users Online
14 Users Online
36 Users Online
42 Users Online
36 Users Online
6 Users Online
19 Users Online
14 Users Online
23 Users Online
20 Users Online
27 Users Online
39 Users Online
46 Users Online
25 Users Online
28 Users Online
14 Users Online
11 Users Online
28 Users Online
33 Users Online
22 Users Online
11 Users Online
27 Users Online
29 Users Online
18 Users Online
16 Users Online
74 Users Online
11 Users Online
15 Users Online
8 Users Online
31 Users Online
9 Users Online

Test it for yourself in PHP Sandbox

EDIT You could work yourself out with the proper results by changing $limit and $diff.

Upvotes: 1

durbnpoisn
durbnpoisn

Reputation: 4669

I have a suggestion... Perhaps what you really want is a range of random numbers. To explain... You could use a Switch statement to actually deliver the results based on your first random number. like this:

 $i = mt_rand(1, 4);
 $finalRand = 0;
 switch ($i) {
    case 1:
        $finalRand = mt_rand(1, 10);
        break;
    case 2:
        $finalRand = mt_rand(11, 20);
        break;
    case 3:
        $finalRand = mt_rand(21, 50);
        break;
    case 4:
        $finalRand = mt_rand(50, 100);
        break;
}

The end result of this routine would be to first randomly choose a number from which to randomly choose a number from a final range.

You can tweak this to get whatever results you want. But that's the basic idea.

Upvotes: 1

Andreas
Andreas

Reputation: 23958

Use a session variable to keep track of what the number was.
If there was a number set make the random number +-5 of previous value.

<?php
session_start();
if(isset($_SESSION['num'])){
    $num = mt_rand($_SESSION['num']-5, $_SESSION['num']+5);
}else{
    $num = mt_rand(10, 100);
}
echo $num . " Users Online"; 
$_SESSION['num'] = $num;

Upvotes: 1

dmoore1181
dmoore1181

Reputation: 2102

You could always change your range on your random number generator to be a smaller range. If you want it to be able to be a little more flexible, you could even replace the 30 and 35 in my example below with variables and calculate the max and min for your random number based on the time if you need it to. 

<?php
echo mt_rand(30, 35)." Users Online";
?>

Upvotes: 1

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