基于linnux+phantomjs实现生成图片格式的网页快照_php实例
安装扩展:
(1)下面是我在linux上的安装过程，如果没有安装git请先yum install git
安装casperjs
cd /
git clone git://github.com/n1k0/casperjs.git
cd casperjs
ln -sf /casperjs/bin/casperjs /usr/local/bin/casperjs //可以忽略 实际执行中php是执行 /casperjs/bin/casperjs
(2)安装phantomjs，下载地址：http://phantomjs.org/download.html
下载后操作很简单，直接把解压好的in\phantomjs移动到usr\local\bin\phantomjs就可以了。
测试phantomjs --version 有结果不报错，说明安装OK
(3)安装字体
1. 首先获得一套“微软雅黑”字体库（Google一下一大把），包含两个文件msyh.ttf（普通）、msyhbd.ttf（加粗）；
2. 在/usr/share/fonts目录下建立一个子目录，例如win，命令如下：
# mkdir /usr/share/fonts/win
3. 将msyh.ttf和msyhbd.ttf复制到该目录下，例如这两个文件放在/root/Desktop下，使用命令：
# cd /root/Desktop
# cp msyh.ttf msyhbd.ttf /usr/share/fonts/win/
4. 建立字体索引信息，更新字体缓存：
# cd /usr/share/fonts/win
# mkfontscale （如果提示 mkfontscale: command not found，需自行安装 # yum install mkfontscale ）
# mkfontdir
# fc-cache （如果提示 fc-cache: command not found，则需要安装# yum install fontconfig ）
至此，字体已经安装完毕！
<?php
if (isset($_GET['url']))
{
set_time_limit(0);
$url = trim($_GET['url']);
$filePath = md5($url).'.png';
if (is_file($filePath))
{
exit($filePath);
}
//如果不加这句就会报错“Fatal: [Errno 2] No such file or directory; did you install phantomjs?”,详情参考http://mengkang.net/87.html
putenv("PHANTOMJS_EXECUTABLE=/usr/local/bin/phantomjs");
$command = "phantomjs phantomjs.js {$url} {$filePath}";
@exec($command);
exit($filePath);
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<title>快照生成</title>
<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<style>
* {margin: 0; padding: 0; } form {padding: 20px; } div {margin: 20px 0 0; } input {width: 200px; padding: 4px 2px; } #placeholder {display: none; }
</style>
</head>
<body>
<form action="" id="form">
<input type="text" id="url" />
<button type="submit">生成快照</button>
<div>
<img src="" alt="" id="placeholder" />
</div>
</form>
<script>
$(function(){
$('#form').submit(function(){
if (typeof($(this).data('generate')) !== 'undefined' && $(this).data('generate') === true)
{
alert('正在生成网站快照，请耐心等待...');
return false;
}
$(this).data('generate', true);
$('button').text('正在生成快照...').attr('disabled', true);
$.ajax({
type: 'GET',
url: '?',
data: 'url=' + $('#url').val(),
success: function(data){
$('#placeholder').attr('src', data).show();
$('#form').data('generate', false);
$('button').text('生成快照').attr('disabled', false);
}
});
return false;
});
});
</script>
</body>
</html>
var page = require('webpage').create();
var args = require('system').args;
var url = args[1];
var filename = args[2];
page.open(url, function () {
page.render(filename);
phantom.exit();
});
以上所述就是本文的全部内容了，希望大家能够喜欢。
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