从最新到最旧的PHP排序图像

Question

Hi I have the following script to show images from a directory and make thumbs , but I would like to know how to sort the images from newest to oldest and how to implement it in this script Many Thanks in Advance!

<?php
    # SETTINGS
    $max_width = 800;
    $max_height = 600;
    $per_page = 10;

    $page = $_GET['page'];

    $has_previous = false;
    $has_next = false;

$images = array();
$times = array();
// read the images folder for jpg, jpeg, png and gif images using glob() - see http://php.net/glob for info
foreach(glob('images/*.{jpg,jpeg,png,gif}', GLOB_BRACE) as $image)
{
    // add the file to the images array
    $images[] = $image;

    // get the files creation/last modification timestamp add it to the times array. 
    // This array will be used later to sort the images array
    $times[] = filemtime($image);

   // generate the image thumbnail if needed
   if(!file_exists('thumbs/' . $image))
   {
       // calling your makeThumb function, pass it the file extension for the image
       makeThumb(basename($image), pathinfo($image, PATHINFO_EXTENSION));
   }
}
// using the times array, to sort the images newest to oldest
array_multisort($times , SORT_DESC, 
                $images);



    function getPictures() {
        global $page, $per_page, $has_previous, $has_next;
        if ( $handle = opendir(".") ) {
            $lightbox = rand();
            echo '<ul id="pictures">';

            $count = 0;
            $skip = $page * $per_page;

            if ( $skip != 0 )
                $has_previous = true;

            while ( $count < $skip && ($file = readdir($handle)) !== false ) {
                if ( !is_dir($file) && ($type = getPictureType($file)) != '' )
                    $count++;
            }
            $count = 0;
            while ( $count < $per_page && ($file = readdir($handle)) !== false ) {
    if ( !is_dir($file) && ($type = getPictureType($file)) != '' ) {

        // make the thumbs directory if it doesn't already exist
        if ( ! is_dir('thumbs') ) {
            mkdir('thumbs');
        }
        // make a thumbnail if it doesn't already exist
        if ( ! file_exists('thumbs/'.$file) ) {
            makeThumb( $file, $type );
        }

        // create a link to $file, add the thumbnail
        echo '<li><a href="' . $file . '">';
        echo '<img src="thumbs/'.$file.'" alt="" /></a></li>';
        $count++;

echo substr($file,strlen($folder),strpos($file, '.')-strlen($folder));

    }
}

            echo '</ul>';

            while ( ($file = readdir($handle)) !== false ) {
                if ( !is_dir($file) && ($type = getPictureType($file)) != '' ) {
                    $has_next = true;
                    break;
                }
            }
        }
    }

    function getPictureType($file) {
        $split = explode('.', $file); 
        $ext = $split[count($split) - 1];
        if ( preg_match('/jpg|jpeg/i', $ext) ) {
            return 'jpg';
        } else if ( preg_match('/png/i', $ext) ) {
            return 'png';
        } else if ( preg_match('/gif/i', $ext) ) {
            return 'gif';
        } else {
            return '';
        }
    }

    function makeThumb( $file, $type ) {
        global $max_width, $max_height;
        if ( $type == 'jpg' ) {
            $src = imagecreatefromjpeg($file);
        } else if ( $type == 'png' ) {
            $src = imagecreatefrompng($file);
        } else if ( $type == 'gif' ) {
            $src = imagecreatefromgif($file);
        }
        if ( ($oldW = imagesx($src)) < ($oldH = imagesy($src)) ) {
            $newW = $oldW * ($max_width / $oldH);
            $newH = $max_height;
        } else {
            $newW = $max_width;
            $newH = $oldH * ($max_height / $oldW);
        }
        $new = imagecreatetruecolor($newW, $newH);
        imagecopyresampled($new, $src, 0, 0, 0, 0, $newW, $newH, $oldW, $oldH);
        if ( $type == 'jpg' ) {
            imagejpeg($new, 'thumbs/'.$file);
        } else if ( $type == 'png' ) {
            imagepng($new, 'thumbs/'.$file);
        } else if ( $type == 'gif' ) {
            imagegif($new, 'thumbs/'.$file);
        }
        imagedestroy($new);
        imagedestroy($src);
    }
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UFT-8" />
<title>Pictures</title>
<link rel="stylesheet" href="css/lightbox.css" type="text/css" media="screen" />
<style type="text/css">
body {
    width:780px;
    margin:0 auto;
}
#pictures li {
    float:left;
    height:<?php echo ($max_height + 10); ?>px;
    list-style:none outside;
    width:<?php echo ($max_width + 10); ?>px;
    text-align:center;
}
img {
    border:0;
    outline:none;
}
.prev {
    float:left;
}
.next {
    float:right;
}
</style>
</head>
<body>

<?php getPictures(); ?>

<div style="clear:both"></div>

<?php
    if ( $has_previous )
        echo '<p class="prev"><a href="?page='.($page - 1).'">&larr; Previous Page</a></p>';

    if ( $has_next )
        echo '<p class="next"><a href="?page='.($page + 1).'">Next Page &rarr;</a></p>';
?>

<div style="clear:both"></div>

<script type="text/javascript" src="js/prototype.js"></script>
<script type="text/javascript" src="js/scriptaculous.js?load=effects,builder"></script>
<script type="text/javascript" src="js/lightbox.js"></script>
</body>
</html>

Answer 1

You can use filemtime($file); for getting the last modification date of your file. You can store your files in an array and use the timestamps as keys. You can sort the array contents by the keys with php easily and just foreach through the sorted array and output it like that. Another advice: You should store your file paths, extensions, upload/modification dates and file sizes in database, it would save much work for you. I hope my answer was helpful. The code:

<?php
function sort_images($basedir){
  $dir = scandir($basedir);
  $files = array();
  foreach($dir as $filename){
    $mimetype = mime_content_type($filename);
    if(explode('/', $mimetype)[0] == 'image'){
      $mod_time = filemtime(basedir.'/'.$filename;
      $files[$mod_time] = $basedir.'/'.$filename;
    }
  }

  $sorted = ksort($files);
  return $sorted;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1   /DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UFT-8" />
<title>Pictures</title>
</head>
<body>
<?php foreach(sort_images('foo/bar') as $image): ?>
<div class="image"><img src="<?php echo $image; ?>" />
<?php endforeach; ?>
</body>
</html>