How to resize a picture on the server side of the PHP implementation

This article illustrates how PHP implements resizing pictures on the server side. Share to everyone for your reference. The specific analysis is as follows:

Resizing a picture on the server side can be a lot more beneficial than a browser's processing.
This article describes how to resize a picture on the server side of PHP.

The code consists of two parts:

①imageresizer () is used to process the image
②loadimage () inserts the image URL in a simpler format

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<?php function Imageresizer ($url, $width, $heig HT) {header (' content-type:image/jpeg '); list ($width _orig, $height _orig) = getimagesize ($url); $ratio _orig = $width _ orig/$height _orig; if ($width/$height > $ratio _orig) {$width = $height * $ratio _orig} else {$height = $width/$ratio _orig;}//This Resa Mples the image $image _p = Imagecreatetruecolor ($width, $height); $image = Imagecreatefromjpeg ($url); Imagecopyresampled ($image _p, $image, 0, 0, 0, 0, $width, $height, $width _orig, $height _orig); Output the image imagejpeg ($image _p, NULL, 100); //works with both POST and get $method = $_server[' Request_method ']; if ($method = = ' Get ') {imageresize ($_get[' url '], $_get[' W '], $_get[' h ']), elseif ($method = = ' POST ') {imageresize ($_po st[' URL '], $_post[' W '], $_post[' h ']); }//Makes the procESS simpler function LoadImage ($url, $width, $height) {echo ' image.php?url= ', UrlEncode ($url), ' &w= ', $width, ' &h = ', $height; }?>

Usage:

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Above code would is in a file called image.php. Images would be displayed as this: "alt=" "/>

I hope this article will help you with your PHP program design.