《PHP實(shí)戰(zhàn):php實(shí)現(xiàn)在服務(wù)器端調(diào)整圖片大小的方法》要點(diǎn):
本文介紹了PHP實(shí)戰(zhàn):php實(shí)現(xiàn)在服務(wù)器端調(diào)整圖片大小的方法,希望對(duì)您有用。如果有疑問,可以聯(lián)系我們。
本文實(shí)例講述了php實(shí)現(xiàn)在服務(wù)器端調(diào)整圖片大小的辦法.分享給大家供大家參考.具體分析如下:PHP應(yīng)用
在服務(wù)器端完成圖片大小的調(diào)整,會(huì)比在瀏覽器的處理有很多的好處.
本文介紹了PHP如安在服務(wù)器端調(diào)整圖片大小.PHP應(yīng)用
代碼包括兩部分:PHP應(yīng)用
① imageResizer() is used to process the image
② loadimage() inserts the image url in a simpler formatPHP應(yīng)用
<?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:PHP應(yīng)用
//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="" />
希望本文所述對(duì)大家的php程序設(shè)計(jì)有所贊助.PHP應(yīng)用
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