使用方法：
设定宽高，不等比例缩放
复制代码 代码如下:
<?php
include('simpleimage.php');
$image = new simpleimage();
$image->load('picture.jpg');
$image->resize(250,400);
$image->save('picture2.jpg');?>
设定宽度，等比例缩放
<?php
include('simpleimage.php');
$image = new simpleimage();
$image->load('picture.jpg');
$image->resizetowidth(250);
$image->save('picture2.jpg');?>
设定高度，等比例缩放
<?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，缩放至50%
<?php
include('simpleimage.php');
$image = new simpleimage();
$image->load('picture.jpg');
$image->scale(50);
$image->save('picture2.jpg');?>
缩放后直接输出到屏幕
<?php
header('content-type: image/jpeg');
include('simpleimage.php');
$image = new simpleimage();
$image->load('picture.jpg');
$image->resizetowidth(150);
$image->output();?>
simpleimage.php 源码请轻点文章开头链接，到那下载
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