php縮放圖片(根據寬高的等比例縮放)實例介紹

推薦一個簡單實用的縮放圖片工具 SimpleImage，參考http://www.white-hat-web-design.co.uk/blog/resizing-images-with-php/

使用方法：

設定寬高，不等比例縮放
復制代碼 代碼如下:
<?php
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resize(250,400);
$image->save('picture2.jpg');?>

設定寬度，等比例縮放

<?php
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToWidth(250);
$image->save('picture2.jpg');?>

設定高度，等比例縮放

<?php
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToHeight(500);
$image->save('picture2.jpg');
$image->resizeToHeight(200);
$image->save('picture3.jpg');?>

按比例，縮放至50%

<?php
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->scale(50);
$image->save('picture2.jpg');?>

縮放後直接輸出到屏幕

<?php
header('Content-Type: image/jpeg');
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToWidth(150);
$image->output();?>


SimpleImage.php 源碼請輕點文章開頭鏈接，到那下載