问题描述
我正在使用 phantomJS 来以编程方式获取网页的屏幕截图.我的网络服务器在Linux 64位上运行.
I'm using phantomJS for the purposes of programmatically taking screenshots of a webpage. My webserver runs on Linux 64 bit.
我的test.php
文件
exec('./phantomjs --version', $o, $e);
print_r($o);
echo $e;
我在浏览器中打开test.php
.我得到的输出是:
I open test.php
in a browser. The out put I get is:
1.9.1 // version number
0 // exit code
这证明我可以通过exec()
运行命令,并且phantomJS
运行正常.
This proves that I can run commands through exec()
and phantomJS
is working perfectly.
现在,当我将上面的代码替换为:
Now when I replace the above code with:
exec('./phantomjs http://mywebsite.com/test.js', $o, $e);
print_r($o);
echo $e;
输出为:
Array ( ) // empty output
139 // exit code which on investigating turned out to be segmentation fault
我也尝试过:
exec('./phantomjs ./test.js', $o, $e); // since phantomjs and test.js are in same folder
但结果是相同的(段错误)
but the result was the same (segfault)
test.js 代码:
var page = require('webpage').create();
var url = 'http://www.rediff.com/';
page.open(url, function (status) {
phantom.exit();
});
这使我相信使用完整路径作为phantomJS
的第二个参数会导致崩溃.因此,我想知道的是:
This makes me believe that using the full path as the second argument of phantomJS
is causing it to crash. Thus, the things that I'm wondering are:
- 我的假设对吗?
- 还是因为我的Web服务器受到某些限制而阻止了
exec()
通过绝对URL访问.js
文件?
- Am I right in my assumption?
- Or is it because of some restriction on my webserver which is blocking
exec()
from accessing the.js
file through absolute URL?
推荐答案
经过大量搜索和测试,我发现它可以与以下新增功能一起使用:
After a lot of searching and testing I got it to work with following additions:
//throws a lot of errors because searching some libraries
$cmd = 'unset DYLD_LIBRARY_PATH ;';
$cmd.= ' /abs/path/to/phantomjs';
$cmd.= ' /abs/path/to/script.js';
//set environment variable to node source
putenv('PATH=/abs/path/to/node/bin/');
//now exec the cmd and pipe the errors to stdout
exec($cmd.' 2>&1', $output);
//and output the results
print_r($output);
我不是最好的服务器管理员,所以我无法详细解释所有内容,但是上面的几行会生成pdf.是的.
I'm not the best server admin, so I can not explain everything in detail, but the lines above generate an pdf. Yeah.
这篇关于exec()和phantomjs问题带有绝对路径的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!