Usage of php image processing function imagecopyresampled

This article mainly introduces the usage of the PHP image processing function imagecopyresampled, and analyzes the function, parameters, and usage of the imagecopyresampled function in detail with examples. Friends in need can refer to it

Grammar

Copy codeThe code is as follows:

bool imagecopyresampled ( resource $dst_image , resource $src_image , int $dst_x , int $dst_y , int $src_x , int $src_y , int $dst_w , int $dst_h , int $src_w , int $src_h )

Parameters

Returns TRUE on success, or FALSE on failure.

Case

Case (image cropping):

Case 2 (resampling) ：

 $ratio_orig) { $width = $height*$ratio_orig; } else { $height = $width/$ratio_orig; } // 重新取样 $image_p = imagecreatetruecolor($width, $height); $image = imagecreatefromjpeg($filename); imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig); // 输出 imagejpeg($image_p, null, 100); ?>

Attached are three ideas for uploading pictures

1 .Select the picture, submit the form, the server handles the upload uniformly, save the path

2.Select the picture, upload, get the path, submit the form, save the path

3. Select the picture, upload it to the server, obtain the picture from the server through some means, and save it locally

The above is the entire content of this article, I hope it will be helpful to everyone learning helps.

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