Possible to use array to set a random value?

**BLiZZaRD** · 07-09-2006, 08:34 AM

Okay so that title might not be the best inthe world. What I have is a script where I am using math over a period of time.

I just started writing the script as an idea I had and wanted to try some php with it.

I have made an array of numbers for the value:

PHP Code:


$value=array(1, 2, 4, 8, 16);
$valtot= '31';

So then I made some check boxes:

Code:

<table>
<tr>
<td>
<input type="checkbox" name="choice1" value=""> Choice 1
</td>
<td>
<input type="checkbox" name="choice2" value=""> Choice 2
</td>
<td>
<input type="checkbox" name="choice3" value=""> Choice 3
</td>
<td>
<input type="checkbox" name="choice4" value=""> Choice 4
</td>
</tr>
</table>

What I am attempting to accomplish next is adding something to the value="" line in the check boxes that I can use for the math part of the script.

I also want the values to be random each time I load the scritp, BUT ONLY the FIRST TIME.

As you can see there is one more value than there are check box options. SO I want the value of the check box to be random, thus leaving one out. Then I will select one or 2 checkboxes, click a button, and it will do the math. then when the math is complete I will select another box (as the others will remain checked) then do another math check.

Then if I refresh the page, NEW values are given to the check boxes, so I could invariably choose the same options each time and get different results.

Does that make sense?

Okay, good. So what I guess I am after then is a way to pull a number randomly from the array and attatch it to a checkbox.

**BLiZZaRD** · 07-09-2006, 11:05 AM

Okay so after some trial and error I have found the use of the

PHP Code:


$rand_keys=array_rand($value,5);

tag. I have placed this inside the tabe, but echoe'd after the Choice 1 text, so basically it is there, but not "assigned" to the choice checkbox it is with.

Is there a way to make choice 1 BE the random number generated by the $rand_keys thing?

**Twey** · 07-09-2006, 11:28 AM

Code:

for($i = 1; $i <= 4; ++$i) {
  $rnd = rand(0, count($value));
  echo('<label><input type="checkbox" name="choice' . $i . '" value="' . $value[$rnd] . '"> Choice ' . $i . '</label>');
  unset($value[$rnd]);  // Prevent the same value appearing twice
}