问题与php命令行 [英] issues with php command line

问题描述

我在我的网络服务器上创建了一个cron作业。该cron每几个小时运行一个PHP文件。它是缓存创建技术。但是有一个问题 - 我的cron命令看起来像这样： php -q /folder/phpfile.php 。当我直接从我的浏览器运行phpfile.php，一切都好，但当CRON运行该文件，它总是输出头已发送错误到error_log！提到的php文件DO开始于 if（！isset（$ _ SESSION））session_start（）; 但是error_log显示正确的session_start

I have created a cron job at my webserver. That cron runs a php file every few hours. It's cache creating technique. But there's a problem - my cron command looks like this: php -q /folder/phpfile.php . When i run "phpfile.php" directly from my browser, everything is ok, but when CRON runs that file, it ALWAYS outputs "headers already sent" error to "error_log"! Mentioned php file DO begins with if(!isset($_SESSION)) session_start(); but "error_log" show that exactly "session_start()" line is throwing the warning!

有什么问题？当我使用浏览器运行该文件时，为什么一切正常，但是当cron这样做时，生成了已经发送的头文件？

What's wrong? Why is everything ok when i run that file with browser, but when cron does it, "headers already sent" is generated?

推荐答案

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output_buffering directive is apperantly ON in your web-server and turned off in cli-php and it is right thing. Because no one wants to wait for content till script ends a job. We want to see what is happening when script is running.

错误的是你用cli脚本发送头。会话不是真正需要在终端，是吗？

Wrong thing is that you send header with a cli script. Session is not really need in terminal, is it?

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