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This article mainly introduces how to use gd library to achieve php server picture clipping and thumbnail generation function, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Crop example:

The final cut into a picture:

Among them, the dotted frame is the picture to be cut out, and finally saved into a 100-wide picture. The code is as follows:

$src_path = '1.jpg'

/ / create an instance of the source diagram

$src = imagecreatefromstring (file_get_contents ($src_path))

/ / coordinates of the point in the upper left corner of the cropping area

$x = 100

$y = 12

/ / width and height of the crop region

$width = 200

$height = 200

/ / finally save the width and height of the image in proportion to the source, otherwise it will be deformed

$final_width = 100

$final_height = round ($final_width * $height / $width)

/ / copy the crop region to the new picture and scale or pull it up according to the width and height of the source and target

$new_image = imagecreatetruecolor ($final_width, $final_height)

Imagecopyresampled ($new_image, $src, 0,0, $x, $y, $final_width, $final_height, $width, $height)

/ / output pictures

Header ('Content-Type: image/jpeg')

Imagejpeg ($new_image)

Imagedestroy ($src)

Imagedestroy ($new_image)

In fact, if the coordinate is (0d0) and the width and height of the crop area is the same as that of the source image, then it is the function of generating thumbnails.

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