donglu9898 2019-04-12 12:47
浏览 85
已采纳

无法使用php exec函数执行nutch crawl命令

I have to run Nutch crawl commands using php exec but it shows

"0 Error: JAVA_HOME is not set"

The command works fine with terminal. I have tried the below code in crawl.php where apache-nutch-1.15 directory is placed.

exec('apache-nutch-1.15/bin/nutch inject crawl/crawldb urls',$output);

and this gives the above mentioned error.

Thank you in advance for any assistance you can provide.

  • 写回答

1条回答 默认 最新

  • dongshou7903 2019-04-12 14:25
    关注

    In order to run Nutch you need the JAVA_HOME environment variable set and pointing to the proper path (where your JVM is installed). This works on your terminal because you have this variable set already. You can check this with:

    $ env | grep JAVA
    

    When a new process is started with exec from PHP, this environment variable is not set because it is not a shell, you're only starting a process without any "shell environment". You can use the putenv function to specify some environment variables before calling exec.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

    报告相同问题?

    悬赏问题

    • ¥15 win11安卓子系统打开谷歌登录不了切使用浏览器显示处于离线状态
    • ¥15 三维直角坐标系下,给定一个平面内四个点坐标,如何将四个点逆时针排序
    • ¥15 UnityWebRequest访问内网地址502
    • ¥20 Python语言来实现牛顿法(Newton's Method)解决非线性(系统)方程的问题。
    • ¥15 matlab控制工业相机采集图像
    • ¥25 R里做折线图和柱状图
    • ¥20 使用kokkos移植项目,遇到问题
    • ¥15 求该问题的Matlab代码
    • ¥15 python下使用pdpbox为何提示has no attribute 'pdp_isolate'?
    • ¥15 求java web病房管理系统项目,用netbeans做的