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Thread: Display the last uploaded image on a page

  1. #1
    Join Date
    Jun 2013
    Location
    New Zealand
    Posts
    4

    Display the last uploaded image on a page

    We have a camera which uploads images to our webserver every 15 seconds. This static image is displayed on a page, and refreshed to show the latest image. This is uploaded as "webcam.jpg".

    I'd like to change the upload such that it uploads a set number of images. This will up upload images as "webcam1_1.jpg" through to "webcam1_480.jpg".
    Once 480 is uploaded, it resets to 1.
    Ultimately I aim to wrap all 480 images into an 60 second loop of the previous 2 hours captured.


    Is it possible to determine the newest image uploaded to the webserver and display this image each 15 second refresh?
    For example if the latest image is webcam1_178, this image is displayed on the page. When next checked, it finds webcam1_179 and displays this image.
    Date modified on the image includes the date and time uploaded.

    I don't use PHP, but that's the language our webserver needs so I appreciate any help!

  2. #2
    Join Date
    Nov 2003
    Location
    Worthington, OH, USA
    Posts
    3,636
    Easiest way would be to read the directory information into an array and sort on the modification date/time.

    Something close to:
    PHP Code:
    $files = array();
    if (
    $handle opendir('.')) {
    while (
    false !== ($file readdir($handle))) {
           if (
    $file != "." && $file != "..") {
              
    $files[filemtime($file)] = $file;
           }
       }
       
    closedir($handle);


    // sort
    ksort($files);
    // find the last modification
    $reallyLastModified end($files);

    foreach(
    $files as $file) {
        
    $lastModified date('F d Y, H:i:s',filemtime($file));
        if(
    strlen($file)-strpos($file,".swf")== 4){
            if (
    $file == $reallyLastModified) {
                
    // do stuff for the real last modified file
            
    }
            echo 
    "$file$lastModified";
        }

    54 68 65 42 65 61 72 4D 61 79

  3. #3
    Join Date
    Jun 2013
    Location
    New Zealand
    Posts
    4
    Thanks for the quick reply!
    How do I add the directory the images are in for the array?
    The images are all .jpg, should the ($file,".swf") in the foreach be .jpg?

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