• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 214
  • Last Modified:

Comparing values from a while loop....

So i have a while loop which does math on several records.

After i have completed math on each record, how can i store each value to sort highest to lowest after the while loop has completed?
0
blink10
Asked:
blink10
  • 3
  • 3
  • 3
2 Solutions
 
Ray PaseurCommented:
Put the values into an array, and you can sort them later.
0
 
Ray PaseurCommented:
Check this link for the ways that PHP can sort arrays of information:
http://us3.php.net/manual/en/array.sorting.php
0
 
UltrusCommented:
Try something like this:

<?php
$magicNumber = 1;
$someNums = array(22,45,24,67);
$combinedArray = array();
$resultArray = array();

foreach($someNums as $someNum) {
  $result = $someNum + $magicNumber;
  $resultArray[] = $result;
  $combinedArray[] = array('result' => $result, 'origNum' => $someNum);
}

array_multisort($resultArray, SORT_DESC, $combinedArray);

print 'Drum roll please... ' . $combinedArray[0]['result'] . ' with an original number of ' . $combinedArray[0]['origNum'];

print '<pre>';
print_r($combinedArray);
print '</pre>';
?>

Open in new window


Let me know if that helps inspire something. :)

Best regards,

Chris
0
Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
blink10Author Commented:
Chris thanks for the solution, but I think I am very close to what i need with my code i wrote since i posted 20 minute ago.


One last problem i am having, i am creating an associate array, sorting it fine, but how can i make it so that i can just choose the lowest value without knowing the corresponding key.

In other words, i just need to lowest variable to do more math with, how can i just select it?
0
 
UltrusCommented:
Since you sorted it Descending (highest value first), try this:

<?php
print $myValues[count($myValues) - 1];
?>

Open in new window


That gives the last index.
0
 
blink10Author Commented:
No luck....

I used:
            foreach ($allcoupons as $key => $val) {
                 echo "$key = $val\n";
                  }

To determine my array after sorting, the above produced:
Round1 = 23.2 Round2 = 28.2744 Round3 = 38.88

Then I wrote:

            echo "<b>Best Price: </b>";
            
            print $allcoupons[count($allcoupons) - 1];

And got nothing, thoughts?
0
 
UltrusCommented:
Ahhh. Your keys are not numeric. That's why.

Try

<?php
print end($allcoupons);
?>

Open in new window


(never tried it before)
0
 
Ray PaseurCommented:
Please read this over carefully.  If you do not know 100% what any of the functions accomplish, look them up on PHP.net and read the descriptions, inputs, outputs (return values) and user-contributed notes.  Then post back with any questions.
http://www.laprbass.com/RAY_temp_blink10.php

You might also want to get this book and give yourself a little time to work through it.  Very readable with great examples.
http://www.sitepoint.com/books/phpmysql4/

Best of luck with your project, ~Ray
<?php // RAY_temp_blink10.php
error_reporting(E_ALL);
echo "<pre>";

// FROM THE POST AT EE
// Round1 = 23.2 Round2 = 28.2744 Round3 = 38.88

// CREATE SOME SIMULATED TEST DATA
$arr = array
( 'Round1' => 23.2
, 'Round2' => 28.2744
, 'Round3' => 38.88
)
;

// SHOW THE SIMULATED TEST DATA
var_dump($arr);

// ORDER IT IN A RANDOM MANNER
shuffle($arr);

// SHOW THE SHUFFLED DATA
var_dump($arr);

// SORT BY VALUES DESCENDING
arsort($arr);
reset($arr);

// SHOW THE LARGEST VALUE IN THE ARRAY
var_dump(current($arr));

Open in new window

0
 
blink10Author Commented:
thanks for the help
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Cloud Class® Course: SQL Server Core 2016

This course will introduce you to SQL Server Core 2016, as well as teach you about SSMS, data tools, installation, server configuration, using Management Studio, and writing and executing queries.

  • 3
  • 3
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now