Solved

php usort

Posted on 2011-09-06
5
399 Views
Last Modified: 2012-05-12
I have this xml file from my YouTube account:
<?xml version="1.0"?>
<YouTubeVideos>
      <title>Video Title
            <video img="//i2.ytimg.com/vi/AhXBvK0x9fg/default.jpg" id="AhXBvK0x9fg" part="17"/>
            <video img="//i1.ytimg.com/vi/PzEdUMOBMRg/default.jpg" id="PzEdUMOBMRg" part="16"/>
            <video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="15"/>
                 ...
                 <video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="1"/>
       </title>
</YouTubeVideos>

Now I want to use usort() function to sort by part:

function sortByPart( $a, $b ){
    if ( $a[part] == $b[part] )
        return 0;
    if ( $a[part] < $b[part] )
         return -1;
    return 1;
}
            
$file = '../YouTubeVideos.xml';
$xml = simplexml_load_file($file);
if (!empty($xml->title)) {
   echo "<div id=\"div-wrap-around-a\">";
   foreach ($xml->title as $title) {
       $count = count($title);
       usort($title->video, 'sortByPart');
       foreach ( $title->video as $video ) {
             echo "<a href='#' id='{$video['id']}' title='$title Ph¿n {$video['part']}'><img src={$video['img']} width=50 align=\"absmiddle\" style=\"padding:5px\" /></a>" . " &nbsp; " .
                      "<a href='#' id='{$video['id']}' title='$title Ph¿n {$video['part']}'>".trim($title)." Ph¿n {$video['part']}</a>&nbsp;"."&nbsp;<img src=\"{$CCT_site['img_path']}videoicon.gif\" />" . "<br />";
          }
    }
    echo "</div>";
}

It's still displaying part 17 down to 1.

Thanks in advance
0
Comment
Question by:aline0508
5 Comments
 
LVL 34

Expert Comment

by:Beverley Portlock
ID: 36487400
1
 
LVL 15

Accepted Solution

by:
babuno5 earned 500 total points
ID: 36487698
try this

if (!empty($xml->title)) {
   echo "<div id=\"div-wrap-around-a\">";
   foreach ($xml->title as $title) {
       $count = count($title);
         $newvideo = array();
         foreach($title->video as $tmp_new)
         {
                  $newvideo[] =array('id'=>(string)$tmp_new['id'],'part'=>(int)$tmp_new['part'],'img'=>(string)$tmp_new['img']);
         }
       usort($newvideo, 'sortByPart');
       foreach ( $newvideo as $video ) {
             echo "<a href='#' id='{$video['id']}' title='$title Ph¿n {$video['part']}'><img src={$video['img']} width=50 align=\"absmiddle\" style=\"padding:5px\" /></a>" . " &nbsp; " .
                      "<a href='#' id='{$video['id']}' title='$title Ph¿n {$video['part']}'>".trim($title)." Ph¿n {$video['part']}</a>&nbsp;"."&nbsp;<img src=\"{$CCT_site['img_path']}videoicon.gif\" />" . "<br />";
          }
    }
    echo "</div>";
}
0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 36490180
I am having trouble making sense of the XML string.  Install this and run it to see why.
<?php // RAY_temp_aline0508.php
error_reporting(E_ALL);
echo "<pre>";


// TEST DATA FROM THE POST AT EE
$xml = <<<XML
<?xml version="1.0"?>
<YouTubeVideos>
      <title>Video Title
            <video img="//i2.ytimg.com/vi/AhXBvK0x9fg/default.jpg" id="AhXBvK0x9fg" part="17"/>
            <video img="//i1.ytimg.com/vi/PzEdUMOBMRg/default.jpg" id="PzEdUMOBMRg" part="16"/>
            <video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="15"/>
            <video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="1"/>
       </title>
</YouTubeVideos>
XML;


// MAKE AN OBJECT
$obj = SimpleXML_Load_String($xml);

// VISUALIZE THE OBJECT
var_dump($obj);

Open in new window

0
 

Author Closing Comment

by:aline0508
ID: 36490248
Thanks.
0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 36490299
If you make a small modification to the XML string, you can use something like this.
http://www.laprbass.com/RAY_temp_aline0508.php
Outputs:
<video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="1"/>
<video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="15"/>
<video img="//i1.ytimg.com/vi/PzEdUMOBMRg/default.jpg" id="PzEdUMOBMRg" part="16"/>
<video img="//i2.ytimg.com/vi/AhXBvK0x9fg/default.jpg" id="AhXBvK0x9fg" part="17"/>

No usort() complexity anywhere in sight!  HTH, ~Ray
<?php // RAY_temp_aline0508.php
error_reporting(E_ALL);
echo "<pre>";


// A DERIVATIVE OF THE TEST DATA FROM THE POST AT EE
$xml = <<<XML
<?xml version="1.0"?>
<YouTubeVideos>
   <YouTubeVideo>
      <title>Video Title</title>
      <video img="//i2.ytimg.com/vi/AhXBvK0x9fg/default.jpg" id="AhXBvK0x9fg" part="17"/>
      <video img="//i1.ytimg.com/vi/PzEdUMOBMRg/default.jpg" id="PzEdUMOBMRg" part="16"/>
      <video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="15"/>
      <video img="//i2.ytimg.com/vi/Q4-j5zQLr2A/default.jpg" id="Q4-j5zQLr2A" part="1"/>
   </YouTubeVideo>
</YouTubeVideos>
XML;


// MAKE AN OBJECT
$obj = SimpleXML_Load_String($xml);

// ACTIVATE THIS TO VISUALIZE THE OBJECT
// var_dump($obj);

// COPY THE VIDEO IMG TAGS INTO A KEYED ARRAY
foreach ($obj->YouTubeVideo->video as $v)
{
    // CREATE A TAG AND AN ARRAY INDEX FROM THE OBJECT
    $tag = $v->AsXML();
    $ndx = (string)$v["part"];

    // USE THE PART NUMBER AS THE ARRAY INDEX KEY
    $arr[$ndx] = $tag;
}

// SORT BY THE KEYS
ksort($arr);

// SHOW THE WORK PRODUCT
foreach ($arr as $video_tag)
{
    echo PHP_EOL . htmlentities($video_tag);
}

Open in new window

0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

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

Developers of all skill levels should learn to use current best practices when developing websites. However many developers, new and old, fall into the trap of using deprecated features because this is what so many tutorials and books tell them to u…
This article discusses four methods for overlaying images in a container on a web page
The viewer will learn how to count occurrences of each item in an array.
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…

770 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