Shulou(Shulou.com)06/03 Report--

This article mainly introduces how to cut and zoom in php to generate thumbnails that meet the requirements. This article is very detailed and has a certain reference value. Interested friends must finish reading it!

The picture is too large and the specification is not uniform, and the display control needs to be completed by JavaScript. When it is used on mobile devices, the display effect is not good and the flow is huge. It is necessary to process the pictures of the existing picture library once, generate thumbnails that meet the needs of mobile devices, and transfer the work done by the client-side JS to the server-side GD library of PHP for centralized processing.

Image source and required size:

The copy code is as follows:

$src_img = "wallpaper.jpg"

$dst_w = 300

$dst_h = 200

Clip the image to ensure that the image area is maximized and scaled to the specified size.

At the beginning, the imagecopyresized method is used for image proportional reduction, and after the actual operation, it is found that the dryness point after image reduction is very serious. Then switch to imagecopyresampled (here, a lot of people reprint this article on the Internet, but they all write imagecopyresampled as imagecopysampled, so I re-post this) method, which will resample the image, smooth the shrunken image, and greatly improve the clarity.

The copy code is as follows:

The above is all the contents of the article "how to cut and scale in php to generate thumbnails that meet your needs". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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