Solved

chose random images for a banner

Posted on 2011-09-12
6
260 Views
Last Modified: 2012-05-12

want to chose random images for a banner  with no duplicate images



function chose(image inventory, number of images to pack in return array){}


$images = array('1.gif', '2.gif', '3.jpg', '4.jpg', '5.gif', '6.jpg', '7.jpg', '8.gif');
$imageSet = chose($images, 4);
echo $imageSet
0
Comment
Question by:rgb192
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 16

Expert Comment

by:santoshmotwani
ID: 36527458
0
 
LVL 8

Accepted Solution

by:
kivan24 earned 500 total points
ID: 36527846
try this:
function chose($img_arr, $img_num) {
    $rand_img = array();
    $img_array_len = count($img_arr);
    for ($i=0; $i<$img_num; $i++) {
        $randindex = rand(0, $img_array_len-1);
        if (!in_array($img_arr[$randindex], $rand_img)) {
            $rand_img[] = $img_arr[$randindex];
        } else {
            $i--;
        }
    }
    return $rand_img;
}


$images = array('1.gif', '2.gif', '3.jpg', '4.jpg', '5.gif', '6.jpg', '7.jpg', '8.gif');
$imageSet = chose($images, 4);
print_r ($imageSet);

Open in new window

0
 
LVL 110

Expert Comment

by:Ray Paseur
ID: 36528541
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 110

Expert Comment

by:Ray Paseur
ID: 36528576
Refresh this screen a few times...
http://www.laprbass.com/RAY_temp_rgb192.php

If you have the risk of duplicates in the original $images array, you can use
http://us.php.net/manual/en/function.array-unique.php

Best regards, ~Ray
<?php // RAY_temp_rgb192.php
error_reporting(E_ALL);

// TEST DATA
$images = array('1.gif', '2.gif', '3.jpg', '4.jpg', '5.gif', '6.jpg', '7.jpg', '8.gif');

// GET FOUR AT RANDOM
shuffle($images);
$chosen = array_slice($images , 0, 4);

// SHOW THE WORK PRODUCT
print_r($chosen);

Open in new window

0
 

Author Closing Comment

by:rgb192
ID: 36554451
this handles duplicates.
thanks
0
 
LVL 110

Expert Comment

by:Ray Paseur
ID: 36554500
Your choice, of course, but I think I would rather use two statements instead of thirteen.
0

Featured Post

MS Dynamics Made Instantly Simpler

Make Your Microsoft Dynamics Investment Count  & Drastically Decrease Training Time by Providing Intuitive Step-By-Step WalkThru Tutorials.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Author Note: Since this E-E article was originally written, years ago, formal testing has come into common use in the world of PHP.  PHPUnit (http://en.wikipedia.org/wiki/PHPUnit) and similar technologies have enjoyed wide adoption, making it possib…
Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…

737 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question