如何将HTML块中的所有图像调整为特定宽度并缓存结果

I'm writing a mobile content adaptation plugin for a bespoke CMS in PHP. The CMS contains <img/> links to images with absolute URLs which are all 400 pixels wide and vary in height.

我正在为PHP中的定制CMS编写移动内容适配插件。 CMS包含如何将HTML块中的所有图像调整为特定宽度并缓存结果链接到图像的绝对URL,这些URL的宽度均为400像素,高度不同。

I'd like to parse the HTML (which is stored in MySQL) and re-scale each image to a new width - this will vary according to the device. I'd also like to cache the images to prevent needlessly resizing them on-the-fly every time the page is loaded

我想解析HTML(存储在MySQL中)并将每个图像重新缩放到新的宽度 - 这将根据设备而有所不同。我还想缓存图像,以防止每次加载页面时不必要地重新调整它们的大小

What's the best way for me to achieve this in PHP using either ImageMagick or GD?

使用ImageMagick或GD在PHP中实现此目的的最佳方法是什么?

2 个解决方案

#1

what about doing something a bit different. basically off load the caching/resizing to an on demand model. so say your application is being run on device A, which requires 200x200 images. you'd change the image links to:

做一些有点不同的事情呢?基本上卸载缓存/调整大小到按需模型。所以说你的应用程序正在设备A上运行,它需要200x200的图像。你将图像链接更改为:

<img src="/images/image.php?height=200&width=200&source=filename.jpg" />

image.php could be a script which does the following:

image.php可以是执行以下操作的脚本:

make sure the existing file exists, and grab it from cache if it exists at this size

确保现有文件存在,如果它以此大小存在,则从缓存中获取它

if not, resize the image and cache it

如果没有,请调整图像大小并将其缓存

the next time your app looks for that image, it would be sent back at the 200px size. alternatively, if the app is now looking for a 300x300 image, that would be built/cached on the new request.

下次您的应用查找该图片时,它将以200px大小发回。或者,如果应用程序现在正在寻找300x300图像,那么将根据新请求构建/缓存该图像。

#2

SEE Best way to cache resized images using PHP and MySQL
for really good ideas on caching mechanism (especially apache webserver intervention concept)

SEE使用PHP和MySQL缓存已调整大小的图像的最佳方法,以获得有关缓存机制的非常好的想法(尤其是apache webserver干预概念)

and

http://phpthumb.sourceforge.net/ which encapsulates using both/either ImageMagick or GD.

http://phpthumb.sourceforge.net/封装使用/ ImageMagick或GD。

#1