Question

我目前正在尝试使用php脚本来建立一个html画廊，该脚本会自动调整它们的大小并将其放到画廊中。我现在的问题是大约有30张图片，并且：

加载网站需要永久的时间。
图像无法正确加载。那个字符串看起来像二进制？我不知道

那是我正在运行的唯一php代码：

<?php
            $directory = "images/gallery/feet";
            $images = glob($directory . "/*.jpg");

            foreach ($images as $image) {

              //getting the image dimensions
              list($width, $height) = getimagesize($image);

              //saving the image into memory (for manipulation with GD Library)
              $image = imagecreatefromjpeg($image);

              // calculating the part of the image to use for thumbnail
              if ($width > $height) {
                $y = 0;
                $x = ($width - $height) / 2;
                $smallestSide = $height;
              } else {
                $x = 0;
                $y = ($height - $width) / 2;
                $smallestSide = $width;
              }
              $thumbSize = 500;
              $thumb = imagecreatetruecolor($thumbSize, $thumbSize);
              imagecopyresampled($thumb, $image, 0, 0, $x, $y, $thumbSize, $thumbSize, $smallestSide, $smallestSide);

              imagejpeg($thumb, null, 100);

              echo "<div class=\"carousel-item\">";
              echo "<img class=\"d-block w-100\" src=\"${thumb}\" />";
              echo "</div>";
            }
            ?>

你知道我能做什么吗？

Answer 1

不要在每次页面加载时都为每个图像运行调整大小算法，这是一个非常昂贵的过程。

为每个文件运行一次-永远-将缩略图保存在子目录中。

然后仅提供指向缩略图文件的链接，并让您的Web服务器处理标题，以便正确呈现图像，而不用获取base64字符串。

类似

<?php
$directory = "images/gallery/feet";
$thmb_dir = $directory . "/thumbnail";
$images = glob($directory . "/*.jpg");

foreach ($images as $image) {

    if (/*thumbnail doesn't already exist*/) {

        //getting the image dimensions
        list($width, $height) = getimagesize($image);

        //saving the image into memory (for manipulation with GD Library)
        $image = imagecreatefromjpeg($image);

        // calculating the part of the image to use for thumbnail
        if ($width > $height) {
            $y = 0;
            $x = ($width - $height) / 2;
            $smallestSide = $height;
        } else {
            $x = 0;
            $y = ($height - $width) / 2;
            $smallestSide = $width;
        }
        $thumbSize = 500;
        $thumb = imagecreatetruecolor($thumbSize, $thumbSize);
        imagecopyresampled($thumb, $image, 0, 0, $x, $y, $thumbSize, $thumbSize, $smallestSide, $smallestSide);

        imagejpeg($thumb, null, 100);

        // Save this image w/ the same name in /thumbnails - I just made up this function name
        saveThumb($thumb, $thmb_dir);
    }

    // Grab the thumbnail with the right name - another made-up function name
    $thumb_link = getThumbLink($image)

    echo "<div class=\"carousel-item\">";
    echo "<img class=\"d-block w-100\" src=\"${thumb_link}\" />";
    echo "</div>";
}

？>

有没有一种使用php编辑图像的好方法？

1 个答案: