如何在Linux Web服务器上运行Phantomjs

Question

I am trying to upload the executable file for Phantomjs onto my web server. Currently, wordpress is installed on this server, so calling phantom will be done mainly through the use of php functions. The server is running Linux x86_64, which is the same repository of Phantom I have downloaded. In one of my wordpress template files I try to call phantom and attempt to run a script, but nothing is echoed. I know the javascript is right because it was one of the examples provided. Also, the Phantomjs file has adequate permissions to run. So no issues there. Here is all of the code I am trying to use to get this to work correctly.

<?php 
/* 
Template Name: Home Template
Description: Page template to show home page content.
*/

//phantom/phantomjs-directory/bin/phantomjs
//phantom/phantomjs-directory/examples/version.js

get_header(); 
?>
<?php 
echo exec('phantom/phantomjs-directory/bin/phantomjs phantom/phantomjs-directory/examples/version.js');
?>

The script being called is located one directory back in examples/ instead of bin/ and can be found below:

"use strict";
console.log('using PhantomJS version ' +
phantom.version.major + '.' +
phantom.version.minor + '.' +
phantom.version.patch);
phantom.exit();

Nothing at all is being logged or echoed. Why would this be?

Answer 1

尝试使用回声和反引号。

echo `/phantom/phantomjs myscript.js`; 

Answer 2

The correct way to exec is

exec('/phantom/phantomjs myscript.js', $response);
echo implode("<br>", $response);

Anyway you should first check that script works by logging in to server via SSH and trying to run the script manually. PhantomJS binary could mismatch server processor architecture (x64 vs x86).

Also mind the path to the binary and the script, the easiest way is to use absolute paths.

Answer 3

I made a couple of mistakes with this one. The golden code that did this for me was only this:

echo exec('/home/mainshee/public_html/wp-content/themes/twentyseventeen/phantom/phantomjs-directory/bin/phantomjs /home/mainshee/public_html/wp-content/themes/twentyseventeen/phantom/phantomjs-directory/examples/version.js');

The major mistake I made was that the paths were not EXACT. You would think that only including the path from he location you were already at would be adequate, but I found they want the ENTIRE path. Start to finish. I also made sure that every file I was trying to execute had 0755 permissions. The last precaution I took was to use scp to upload the phantomjs file folder rather than the traditional method. This was done to avoid any corruptions (although I am not sure if it made any difference in the end). Hope this helps somebody else!