使用 PHP 变量执行 Python 脚本

问题描述

我正在编写一个简单的应用程序，它使用表单中的信息，通过 $_POST 将其传递给执行 python 脚本并输出结果的 PHP 脚本.我遇到的问题是我的 python 脚本实际上并没有在传入参数的情况下运行.

I am writing a simple application that uses information from a form, passes it through $_POST to a PHP script that executes a python script and outputs the results. The problem I am having is that my python script is not actually running with the arguments being passed in.

process3.php 文件:

process3.php file:

<?php
     $start_word = $_POST['start'];
     $end_word = $_POST['end'];
     echo "Start word: ". $start_word . "<br />";
     echo "End word: ". $end_word . "<br />";
     echo "Results from wordgame.py...";
     echo "</br>";
     $output = passthru('python wordgame2.py $start_word $end_word');
     echo $output;
?>

输出:

Start word: dog
End word: cat
Results from wordgame.py...
Number of arguments: 1 arguments. Argument List: ['wordgame2.py']

在我的 wordgame2.py 顶部，我有以下内容(用于调试目的):

At the top of my wordgame2.py, I have the following (for debugging purposes):

#!/usr/bin/env python
import sys
print 'Number of arguments:', len(sys.argv), 'arguments.'
print 'Argument List:', str(sys.argv)

为什么传递的参数数量不是 3?(是的，我的表单确实正确发送了数据.)

Why isn't the number of arguments being passed = 3?(Yes, my form does send the data correctly.)

非常感谢任何帮助！

我可能会补充说，当我明确告诉它开始和结束词时，它确实会运行......像这样:

I might add that it does run when I explicitly tell it the start and end word... something like this:

$output = passthru('python wordgame2.py cat dog');
echo $output

推荐答案

更新 -

既然我知道 PHP，错误在于使用单引号 '.在 PHP 中，单引号字符串被视为文字，PHP 不会评估其中的内容.但是，双引号 " 字符串会被评估，并且会按照您的预期工作.这在 中有很好的总结这个 SO 答案.在我们的例子中，

Now that I am aware of PHP, the mistake lies in using the single-quotes '. In PHP, single quoted strings are considered literals, PHP does not evaluate the content inside it. However, double quoted " strings are evaluated and would work as you are expecting them to. This is beautifully summarized in this SO answer. In our case,

$output = passthru("python wordgame2.py $start_word $end_word");

会工作，但以下不会 -

would work, but the following won't -

$output = passthru('python wordgame2.py $start_word $end_word');

原始答案 -

我认为错误在于

$output = passthru("python wordgame2.py $start_word $end_word");

试试这个

$output = passthru("python wordgame2.py ".$start_word." ".$end_word);

这篇关于使用 PHP 变量执行 Python 脚本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！