使用 PHP 提取 EXIF 数据

Question

我正在为需要照片库的客户建立一个网站，我打算使用文件名作为 alt 标签，但他希望我使用他在 EXIF 数据中输入的关键字 - 因为我不是摄影师，所以我真的不明白这的技术方面，但是，到目前为止，我有一个脚本可以获取文件名，我希望它就像更改几行代码以获取 EXIF 而不是文件名一样简单。这是我的代码：

<?php
//The directory to your images folder, with trailing slash
$dir = "cms/gallery/photo/";

//Set the extensions you want to load, seperate by a comma.
$extensions = "jpeg,jpg";

//Set the number of images you want to display per page
$imagesPerPage = 3;

//Set the $page variable
if(!isset($_GET['page'])){
    $page = 1;
}else{
    $page = $_GET['page'];
}

//Load all images into an array
$images = glob($dir."*.{".$extensions."}", GLOB_BRACE);

//Count the number of images
$totalImages = count($images);

//Get the total pages
$totalPages = ceil($totalImages / $imagesPerPage);

//Make sure the page you are on is not greater then the total pages available.
if($page > $totalPages){
    //Set the currnet page to the total pages.
    $page = $totalPages;
}

//Now find where to start the loading from
$from = ($page * $imagesPerPage) - $imagesPerPage;

//Now start looping
for($i = $from; $i < ($from + $imagesPerPage); $i++){
    //We need to make sure that its within the range of totalImages.
    if($i < $totalImages){
        $filename = explode('.', basename($images[$i])); // GET EXIF DESCRIPTION AS $FILENAME
        //Now we can display the image!
        echo "

            <div class='galleryCellHolder'>
                <div class='galleryCell'>
                    <a class='fancybox' rel='group' href='{$images[$i]}'><img class='galleryPhoto' src='{$images[$i]}' alt='" . $filename[0] . "'></a>
                </div>
            </div>

        ";
    }
}

//Now to display the page numbers!
for($p = 1; $p <= $totalPages; $p++){
    if($p == $page){
        $tmp_pages[] = "<a class='noPagination'>{$p}</a>";
    }else{
        $tmp_pages[] = "<a class='pagination' href='?page={$p}'>{$p}</a>";
    }
}
?>
<div class="clearLeft"></div>
<div id="pagination">
    <?php

    //Now display pages, seperated by a hyphon.
    echo "<br />" . implode("", $tmp_pages);

    ?>
</div>

Answer 1

做这个：

$filedata = exif_read_data($images[$i]);
if(is_array($filedata) && isset($filedata['ImageDescription'])){
    $filename = $filedata['ImageDescription'];
} else{
    $filename = explode('.', basename($images[$i]));
    $filename = $filename[0];
}

如果FileNameexif 数据中不存在，$filename则将包含路径中的文件名。

正确的名称可能位于与 不同的变量中$filedata['ImageDescription']。例如，它也可能位于$filedata['FileName']或中$filedata['Title']。亲自看看哪一个有效