PHP调用content_verification.py无返回结果求助

我尝试实现PHP调用Python脚本处理用户输入的功能，其中email_verification.py可正常返回结果，但content_verification.py通过PHP调用时无法返回任何内容。已添加超时设置但无效，该Python脚本在终端直接运行正常，仅PHP调用时出现问题。

content_verification.py #

import language_tool_python
import re
import sys

def check_grammar(email_content):
    tool = language_tool_python.LanguageTool('en-US')
    matches = tool.check(email_content)
    return matches

def find_triggered_phrase(email_content):
    SUSPICIOUS_PHRASES = ['urgent', 'bank account', 'password', 'click here', 'login now']
    email_content = email_content.lower()

    for phrase in SUSPICIOUS_PHRASES:
        if phrase in email_content:
            return phrase

    return None

def is_suspicious_formats(email_content):
    SUSPICIOUS_FORMATS = [
        r'<a href="http',  # 超链接
        r'<!DOCTYPE html>',  # HTML文档声明
        r'<html>',  # HTML标签
        r'<body>',  # HTML标签
        r'<script>',  # JavaScript标签
    ]

    for format in SUSPICIOUS_FORMATS:
        if re.search(format, email_content, re.IGNORECASE):
            return True

    return False

def main(email_content):
    grammar_errors = check_grammar(email_content)
    suspicious_phrases = find_triggered_phrase(email_content)
    suspicious_formats = is_suspicious_formats(email_content)

    result = ""

    if grammar_errors:
        result += "Grammar errors:\n"
        for error in grammar_errors:
            result += f"Message: {error.message}\n"
            result += f"Suggested corrections: {error.replacements}\n"

    if suspicious_phrases:
        result += "The input contains suspicious phrases:\n"
        for phrase in suspicious_phrases:
            print(f"- {phrase}\n")

    if suspicious_formats:
        result += "The input contains suspicious email formats.\n"

    if not grammar_errors and not suspicious_phrases and not suspicious_formats:
        result += "No issues found.\n"

    return result

if len(sys.argv) != 2:
    print("Usage: python content_verification.py <email>")
else:
    email_content = sys.argv[1]
    result = verify_email(email_content)
    print(result)

PHP文件 #

<?php
try {
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        $content = $_POST["content"];
        echo "Content: " . $content . "<br>";

        // 执行内容验证的Python脚本
        $content_command = 'timeout 2m python content_verification.py ' . escapeshellarg($content);
        $content_output = shell_exec($content_command);

        // 去除输出首尾空白
        $content_message = trim($content_output);
    }
} catch (Exception $e) {
    // 异常处理
    $message = 'Caught exception: ' . $e->getMessage();
}
?>

1. 修复Python脚本函数调用错误
   脚本末尾调用了不存在的verify_email函数，这是核心笔误，应改为调用定义好的main函数：

   result = main(email_content)
   

   这个错误会导致脚本执行时抛出NameError，终端运行时如果用的是修正后的版本能正常工作，但贴出的代码存在此问题，是PHP调用无输出的主要原因。

2. 修正可疑短语处理逻辑
   find_triggered_phrase返回单个匹配短语（字符串），原代码中for phrase in suspicious_phrases会将字符串按字符迭代，且用print直接输出而非追加到result变量，导致输出混乱。修改为：

   if suspicious_phrases:
       result += "The input contains suspicious phrases:\n"
       result += f"- {suspicious_phrases}\n"
   

3. PHP端捕获错误输出辅助排查
   shell_exec仅捕获标准输出，无法获取脚本错误信息，改用exec同时获取输出和返回码：

   $content_command = 'timeout 2m python content_verification.py ' . escapeshellarg($content);
   exec($content_command, $output, $return_var);
   $content_message = implode("\n", $output);
   echo "Verification Result: " . $content_message . "<br>";
   echo "Script Return Code: " . $return_var . "<br>";
   

   返回码非0说明脚本执行出错，可据此进一步排查。

4. 确保Python环境一致性
   PHP运行用户（通常为www-data）的Python环境可能与终端用户不同，导致language_tool_python未安装。指定完整Python路径并安装依赖：

   sudo -u www-data pip install language_tool_python
   

内容的提问来源于stack exchange，提问作者drag pollet