PHP image processing-image cropping using imagecopyresampled function example

This article mainly introduces the example of using imagecopyresampled function to crop images for PHP image processing. This example is relatively simple and is an entry-level learning summary, for more information, see crop images in a large background image. a common application is to crop an image in a specified area, you can crop an appropriate area from the uploaded image as your profile picture. Image cropping is similar to image scaling. Therefore, this function is also implemented using the imagecopyresampled () function. We also use JPEG image format as an example to declare an image cropping function cut (). The code is as follows:

The code is as follows:

<? Php
// Crop the image in the specified area in a large background image. the jpeg image format is used as an example.
Function cut ($ filename, $ x, $ y, $ width, $ height ){
$ Back = imagecreatetruecolor ($ width, $ height );
// Create a resource that can save the cropped image
$ Cutimg = imagecreatetruecolor ($ width, $ height );
// Use the imagecopyresampled () function to crop the image.
Imagecopyresampled ($ cutimg, $ back, 0,0, $ x, $ y, $ width, $ height, $ width, $ height );
// Save the cropped image. if you do not want to overwrite the image, you can add a prefix to the cropped image.
Imagejpeg ($ cutimg, $ filename );
Imagedestroy ($ cutimg );
Imagedestroy ($ back );
}

Cut ("brophp.jpg", 50, 50,200,200 );
?>