通过php中的exif数据对图像进行排序
发布时间:2020-12-13 17:16:19 所属栏目:PHP教程 来源:网络整理
导读:我是php的新手,我正试图弄清楚如何通过exif创建日期对图像进行排序.下面的代码是我遵循的本教程中的代码: Simple Php Gallery Pagination 我只是修改了一点来检索exif数据 我正在寻找一个没有数据库的方法,目标是有一个分页库(现在它是分页的)排序最新的第
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我是php的新手,我正试图弄清楚如何通过exif创建日期对图像进行排序.下面的代码是我遵循的本教程中的代码:
Simple Php Gallery Pagination
我只是修改了一点来检索exif数据 function getPictures() {
global $page,$per_page,$has_previous,$has_next,$DirFoto,$DirThumb;
if ( $handle = opendir($DirFoto) ) {
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++;
}
while ( $count < $per_page && ($file = readdir($handle)) !== false ) {
if ( !is_dir($file) && ($type = getPictureType($file)) != '' ) {
$exif = exif_read_data("$DirFoto/$file",true);
if ( ! is_dir($DirThumb) ) {
mkdir($DirThumb);
}
if ( ! file_exists($DirThumb.'/'.$file) ) {
makeThumb( $file,$type );
}
echo '<li><a href="'.$DirFoto.'/'.$file.'" title="Photo taken on '.date("F d Y,H:i:s",strtotime($exif['IFD0']['DateTime'])).'">';
echo '<img src="'.$DirThumb.'/'.$file.'" alt="'.date("F d Y,strtotime($exif['IFD0']['DateTime'])).'"/>';
echo '</a></li>';
$count++;
}
}
echo '</ul>';
while ( ($file = readdir($handle)) !== false ) {
if ( !is_dir($file) && ($type = getPictureType($file)) != '' ) {
$has_next = true;
break;
}
}
}
}
解决方法
我整理了一些代码,这是我的结果:
???? $ScriptsHead = '
<link type="text/css" media="screen" rel="stylesheet" href="./stile.css"/>
<link type="text/css" rel="stylesheet" href="./js/photoswipe.css"/>
<script type="text/javascript" src="./js/jquery-1.8.3.js"></script>
<script type="text/javascript" src="./js/klass.min.js"></script>
<script type="text/javascript" src="./js/code.photoswipe-3.0.5.min.js"></script>
<script type="text/javascript" src="./js/miophotoswipe.js"></script>
';
function getPictures() {
global $page,$DirThumb;
if ( $handle = opendir($DirFoto) ) {
$skip = $page * $per_page;
$images = array(); # empty data structure
while(($file = readdir($handle)) !== false ) {
if($file == '..' || $file == '.' || is_dir($file) || getPictureType($file) == '')
continue;
# only for images
$exif = exif_read_data("$DirFoto/$file",true);
$date = $exif['IFD0']['DateTime']; # everything you like to be ordered
$images[$file] = $date; # associate each file to its date
}
asort($images); # sort the structure by date
echo '<ul id="pictures">';
if ( $skip != 0 )
$has_previous = true;
$count = -1;
foreach ($images as $file => $fileDate) {
$count ++;
if($count < $skip)
continue;
if($count >= $skip + $per_page) {
$has_next = true;
break;
}
if ( ! is_dir($DirThumb) ) {
mkdir($DirThumb);
}
if ( ! file_exists($DirThumb.'/'.$file) ) {
makeThumb( $file,$type );
}
echo '<li><a href="'.$DirFoto.'/'.$file.'" title="Photo taken on '.date("F d Y,strtotime($fileDate)).'">';
echo '<img src="'.$DirThumb.'/'.$file.'" alt="'.date("F d Y,strtotime($fileDate)).'"/>';
echo '</a></li>';
}
echo '</ul>';
}
}
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,$DirThumb;
if ( $type == 'jpg' ) {
$src = imagecreatefromjpeg($DirFoto.'/'.$file);
} else if ( $type == 'png' ) {
$src = imagecreatefrompng($DirFoto.'/'.$file);
} else if ( $type == 'gif' ) {
$src = imagecreatefromgif($DirFoto.'/'.$file);
}
if ( ($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,$src,$newW,$newH,$oldW,$oldH);
if ( $type == 'jpg' ) {
imagejpeg($new,$DirThumb.'/'.$file);
} else if ( $type == 'png' ) {
imagepng($new,$DirThumb.'/'.$file);
} else if ( $type == 'gif' ) {
imagegif($new,$DirThumb.'/'.$file);
}
imagedestroy($new);
imagedestroy($src);
}
/* echo phpinfo(); */
?>
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