php开源,php服务器端

崔湘灵

本文实例讲述了php实现在服务器端调整图片大小的方法。

分享给大家供大家参考。

具体分析如下:在服务器端完成图片大小的调整,会比在浏览器的处理有很多的好处。

本文介绍了PHP如何在服务器端调整图片大小。

代码包括两部分:① imageResizer() is used to process the image② loadimage() inserts the image url in a simpler format? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ?php function imageResizer($url, $width, $height) { header('Content-type: image/jpeg'); list($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 resamples 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($_POST['url'], $_POST['w'], $_POST['h']); } // makes the process simpler function loadImage($url, $width, $height){ echo 'image.php?url=', urlencode($url) , 'w=',$width, 'h=',$height; } ? 用法:? 1 2 3 //Above code would be in a file called image.php. //Images would be displayed like this: img src=?php loadImage('image.jpg', 50, 50) ? alt= / 希望本文所述对大家的php程序设计有所帮助。