exec 11的退出代码含义 [英] exec Exit Code Meaning for 11

问题描述

我在Linux Web服务器上使用以下代码

I'm using the following code on a linux web server

$error = exec('phantomjs table1.js', $op, $code);
echo $code; // prints 11 on screen

---

table1.js

var page = require('webpage').create();
var url = 'table1.php';
page.open(url, function (status) {
    page.render('ss/table1.png');
    phantom.exit();
});

---

table1.php

echo '<h1>This should be converted to an image</h1>';

我经历了 此 链接，但其中未列出该代码.知道这个退出代码代表什么吗?

I went through this link but that code isn't listed there. Any idea what this exit code stands for?

推荐答案

代码11是分段错误":分段错误(也称为segfault)是由程序试图在内存中分配数据时引起的.未分配给程序.它指示程序错误，通常(如果不是总是)使程序崩溃.在您的情况下，segfault可能是由phantomjs引起的，它表明可能是旧版本或Beta版本.

Code 11 is a "segmentation fault": A segmentation fault (also segfault) is caused by a program when it tries to allocate data in a piece of memory that is not assigned to the program. It indicates a program error and usually (if not always) crashes the program. In your case, the segfault probably is caused by phantomjs, which indicates perhaps an old or beta version.

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