Using the GD Library to implement PHP service-side picture clipping and generating thumbnails share _php tutorial

cropping example:

The final cropped image:

Inside the dashed box is the picture to be cropped and finally saved to 100 wide. The code is as follows:

Copy the Code code as follows:
$src _path = ' 1.jpg ';
Create an instance of the source graph
$SRC = imagecreatefromstring (file_get_contents ($src _path));

Crop the coordinates of the point in the upper-left corner of the open area
$x = 100;
$y = 12;
Width and height of clipping area
$width = 200;
$height = 200;
Finally save the width and height of the picture, and the source to equal proportions, otherwise it will deform
$final _width = 100;
$final _height = Round ($final _width * $height/$width);

Copy the cropping area to a new picture and zoom in or out based on the width of the source and destination
$new _image = Imagecreatetruecolor ($final _width, $final _height);
Imagecopyresampled ($new _image, $src, 0, 0, $x, $y, $final _width, $final _height, $width, $height);

Output picture
Header (' Content-type:image/jpeg ');
Imagejpeg ($new _image);

Imagedestroy ($SRC);
Imagedestroy ($new _image);

In fact, if the coordinates are (0,0), the width and height of the cropping area are consistent with the width of the source graph, then it is the function of generating thumbnails.

Summarize

Here are just a list of examples of PHP cropped images, which are part of the service-side functionality. If the client needs, recommend a jquery plug-in imageareaselect, compatibility is very good.

http://www.bkjia.com/PHPjc/621662.html www.bkjia.com true http://www.bkjia.com/PHPjc/621662.html techarticle Cropping example: The final cropped Image: where the dashed box is the picture to be cropped and finally saved to a 100-wide picture. The code is as follows: Copy code code as follows: $src _path ...

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