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php实现在服务器端调整图片大小的方法

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Release: 2016-06-06 20:03:20
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这篇文章主要介绍了php实现在服务器端调整图片大小的方法,实例分析了imageResizer与loadimage操作图片的相关技巧,需要的朋友可以参考下

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 image
② loadimage() inserts the image url in a simpler format

$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:

//Above code would be in a file called image.php. //Images would be displayed like this:

希望本文所述对大家的php程序设计有所帮助。

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