从PHP脚本调用Python脚本时，不会通过PHP调用创建在控制台运行时创建的临时文件

Scenario:

I have a php page in which I call a python script.

我有一个php页面,我在其中调用python脚本。

Python script when run on the command line (Linux) shows output on the command line, as well as writes the output to a file.

在命令行(Linux)上运行时,Python脚本在命令行上显示输出,并将输出写入文件。

Python script when run through php, doesn't do either.

通过php运行时的Python脚本也没有。

Elaboration:

I use a simple system command in PHP to run the python script as:

我在PHP中使用一个简单的系统命令来运行python脚本:

/var/www/html/1.php: system('/usr/python/bin/python3 ../cgi-bin/tabular.py 1');

/var/www/html/1.php:system('/ usr / python / bin / python3 ../cgi-bin/tabular.py 1');

/var/www/cgi-bin/tabular.py --This python file basically parses a data file, uses python's regular expression to search for specific headings and outputs the headings to the stdout, as well as write it to a file.

/var/www/cgi-bin/tabular.py - 这个python文件基本上解析数据文件,使用python的正则表达式搜索特定标题并将标题输出到标准输出,并将其写入文件。

This python script has a few routines in it which get executed, so I put print statements to debug. I noticed only a few initial print statements' output in the PHP page, all the ones from the function that actually does something are not seen.

这个python脚本中有一些例程可以执行,因此我将print语句调试。我注意到PHP页面中只有一些初始打印语句的输出,所有来自实际执行某些操作的函数都没有看到。

Also, as part of my test, I thought well the py script is in a different folder so let me change it to the /var/www/html folder, no go.

另外,作为我测试的一部分,我认为py脚本位于不同的文件夹中,所以让我将其更改为/ var / www / html文件夹,不用了。

I hope I captured the problem statement with sufficient detail and someone is able to reproduce this issue at their end. If I make any progress on this one myself, I'll annotate this question. Thanks everyone.

我希望我能够充分详细地捕获问题陈述,并且有人能够在最后重现这个问题。如果我自己在这个上取得任何进展,我会诠释这个问题。感谢大家。

Gaurav

3 个解决方案

#1

I bet your py script has some bug which couses it to break when called from inside PHP. Try

我打赌你的py脚本有一些错误,当从PHP内部调用时它会破坏它。尝试

passthru('/usr/python/bin/python3 ../cgi-bin/tabular.py 1 2>&1');

to investigate (notice 2>&1 which causess stderr to be written to stdout).

调查(通知2>&1导致stderr被写入stdout)。

#2

A permission problem is most likely the case.

许可问题很可能就是这种情况。

If apache is running as apache, then it will not have access to write to a file unless

如果apache作为apache运行,那么它将无权写入文件,除非

The file is owned by apache

该文件归apache所有

The file is in the group apache and group writable

该文件位于组apache和组可写

The file is world writable

该文件是世界可写的

This is a "sticky" problem on a multi-user machine, as different people have access to Apache.

这是多用户计算机上的“粘性”问题,因为不同的人可以访问Apache。

Try chmod 666 output.txt on the file and then re-run your test.

在文件上尝试chmod 666 output.txt,然后重新运行测试。

Considerations:

Have the python script write the output to a database

让python脚本将输出写入数据库

Use PHP's popen functionality to open the process and communicate over pipes

使用PHP的popen功能打开进程并通过管道进行通信

Re-write using PHP's regular expressions

使用PHP的正则表达式重写

Write the output file to /tmp and then read the results using PHP as soon as the python script is done.

将输出文件写入/ tmp,然后在python脚本完成后立即使用PHP读取结果。

etc...

#3

Check that the user the python script is running is has write permissions in CWD. Also, try shell_exec() or passthru() to call the script, rather than system().

检查python脚本正在运行的用户是否具有CWD的写权限。另外,尝试使用shell_exec()或passthru()来调用脚本,而不是system()。

#1