Create image thumbnails using PHP and Highslide

In web design and development, pictures are one of the elements that often appear. However, when a web page contains a large number of high-definition images, it will significantly increase the page loading time and affect the user experience. To solve this problem, we can use image thumbnails to reduce the size of the original image, thereby increasing the loading speed of the page.

This article will introduce how to use PHP and Highslide to create image thumbnails. Highslide is a powerful JavaScript library for creating beautiful image thumbnails and image browsers. PHP is a widely used server-side scripting language that can be used to generate images and process files.

Step 1: Install Highslide

First, we need to install Highslide in our project. We can download the latest version of Highslide from the Highslide official website. Once downloaded, we can unzip Highslide into our project directory and include Highslide's JavaScript and CSS files in the tag of the web page.

Step 2: Create a thumbnail

Next, we need to create the original image as a thumbnail. For this we can use PHP’s GD library. The GD library is an image processing library that can be used to generate and scale images. We can use the following code to shrink the image to the specified size:

<?php
// 配置原始图片路径和缩略图路径
$image_path = "images/my_image.jpg";
$thumb_path = "thumbs/my_thumb.jpg";

// 配置缩略图的大小
$thumb_width = 200;
$thumb_height = 200;

// 获取原始图片的信息
list($image_width, $image_height) = getimagesize($image_path);

// 计算缩略图的比例
$thumb_ratio = $thumb_width / $thumb_height;
$image_ratio = $image_width / $image_height;
if ($thumb_ratio < $image_ratio) {
    $new_width = $thumb_width;
    $new_height = $new_width / $image_ratio;
} else {
    $new_height = $thumb_height;
    $new_width = $new_height * $image_ratio;
}

// 创建缩略图
$thumb = imagecreatetruecolor($thumb_width, $thumb_height);
$image = imagecreatefromjpeg($image_path);
imagecopyresampled($thumb, $image, 0, 0, 0, 0, $new_width, $new_height, $image_width, $image_height);
imagejpeg($thumb, $thumb_path, 75);
?>

The above code reduces the original image to the specified size and saves the generated thumbnail to the specified path.

Step 3: Add Highslide effect

Now, we have successfully created the thumbnail. In order to make the thumbnails more vivid and beautiful, we can add Highslide effect. To do this, we can use the following code:

<a href="images/my_image.jpg" class="highslide" onclick="return hs.expand(this)">
  <img src="thumbs/my_thumb.jpg" alt="My Image" title="点击查看大图" />
</a>

<style>
  .highslide {
    display: block;
    margin-bottom: 20px;
  }

  .highslide img {
    border: 0;
  }
</style>

<script>
  hs.graphicsDir = 'highslide/graphics/';
  hs.align = 'center';
  hs.transitions = ['expand', 'crossfade'];
  hs.fadeInOut = true;
  hs.dimmingOpacity = 0.75;

  hs.addSlideshow({
    interval: 5000,
    repeat: true,
    useControls: true,
    fixedControls: 'fit',
    overlayOptions: {
      opacity: 0.75,
      position: 'bottom center',
      hideOnMouseOut: true
    }
  });
</script>

The above code will convert our thumbnail into a Highslide effect. When the user clicks on the thumbnail, Highslide will display the original image with a beautiful animation and provide some useful controls such as playing slideshow, resizing and downloading.

Step 4: Create your own picture library

Now, we have successfully created a set of picture thumbnails using PHP and Highslide. We can repeat the above steps to create more thumbnails and combine them into a beautiful gallery. We can use the photo album plugin to create photo albums and display beautiful thumbnails and image galleries on the web page. When developing your own image library, we should make sure to use good programming practices, such as optimizing code, using caching, and using technologies such as CDN, to ensure the best performance and user experience.

Conclusion

In this article, we learned how to use PHP and Highslide to create image thumbnails and convert them into a beautiful image gallery. Using these technologies, we can improve our website's loading speed and user experience, and make our website more attractive and professional. We encourage readers to apply these technologies to their own web design and development, and to continuously improve and optimize their websites.

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