PHP + Shell 返回 HTML答案

【问题标题】：PHP + Shell Returning HTMLPHP + Shell 返回 HTML
【发布时间】：2016-05-10 05:54:46
【问题描述】：

我目前遇到一个问题，我正在尝试执行解释文件并回显 html 的 shell 脚本，shell 脚本在本地完美执行但是当我尝试通过 php 执行时它不会返回任何内容，而且似乎虽然 php 根本没有执行它，但我有一个文件是在执行脚本时创建的，它不会显示在 php 执行中。我有其他用 php 执行的脚本并且工作得很好，而且我有适当的 www-data 权限来执行这个文件。请帮帮我，这是我要执行的脚本和正在执行它的 php 文件。

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<table width="1000" border="0" align="center" cellpadding="0" cellspacing="0">
  <tbody>
    <tr>
      <th style="font-size: 24px" scope="col"><p align="left" class="title_Font">Magnum Dongs <span style="font-size: 18px">&nbsp;|&nbsp; Mighty Meat Sticks 4 Kidz</span></p></th>
    </tr>
  </tbody>
</table>
<ul align="center" width="1000" height="50">
  <li><a href="#home">Home</a></li>
  <li><a href="#news">Stories</a></li>
  <li><a href="#contact">Memes</a></li>
  <li><a href="#about">Shop</a></li>
  <li><a href="#email">Email</a></li>
</ul>
<table width="1000" height="386" border="0" align="center" cellpadding="0" cellspacing="0" class="body_Main">
  <tbody>
    <?php 
    echo exec('./var/www/html/newdongs/fetch_html.sh');
    ?>
  </tbody>
</table>
</body>
</html>

#!/usr/bin/env bash
python3 /bin/dongs/db_Read.py >> lines
#1
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==11' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==41' lines`"</p>"
echo "<img src='"`awk 'NR==31' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==21' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#2
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==12' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==42' lines`"</p>"
echo "<img src='"`awk 'NR==32' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==22' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#3
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==13' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==43' lines`"</p>"
echo "<img src='"`awk 'NR==33' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==23' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#4
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==14' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==44' lines`"</p>"
echo "<img src='"`awk 'NR==34' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==24' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#5
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==15' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==45' lines`"</p>"
echo "<img src='"`awk 'NR==35' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==25' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#6
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==16' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==46' lines`"</p>"
echo "<img src='"`awk 'NR==36' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==26' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#7
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==17' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==47' lines`"</p>"
echo "<img src='"`awk 'NR==37' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==27' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#8
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==18' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==48' lines`"</p>"
echo "<img src='"`awk 'NR==38' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==28' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#9
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==19' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==49' lines`"</p>"
echo "<img src='"`awk 'NR==39' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==29' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"
#10
echo "<tr>"
echo "<th scope='col'>"
echo "table width='1000' border='0' class='post' align='center' style='margin-top: 10px;'>"
echo "<tbody>"
echo "<tr>"
echo "<th scope='col' width='50'>"
echo "<p style='font-size: 0px; margin:0px; ' align='center'> Posted By: "`awk 'NR==20' lines`"</p>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Total Score: "`awk 'NR==50' lines`"</p>"
echo "<img src='"`awk 'NR==40' lines`"'  width='150' height='150' alt=''/>"
echo "<p style='font-size: 0px; margin: 0px; ' align='center'> Upvote | Downvote</p>"
echo "</th>"
echo "<th scope='col' align='left' valign='top'>"
echo "<p class='post' style='font-size: 14px'>"`awk 'NR==30' lines`"</p>"
echo "</tr>"
echo "</tbody>"
echo "</table></th>"

提前感谢您的帮助！

【问题讨论】：

代替 exec() 尝试使用 system()
我尝试了 system() ，但仍然没有。所有的脚本都有chmod 777，所以他们肯定有执行权。
造成这种情况的原因可能很多。您是否至少检查了路径以确保 python3 和 awk 在其中？您是否查看调用结果以查看是否有错误？
代码在我的系统上本地执行，没有问题。我认为这不是 shell 脚本的问题，我认为这是 php 不执行我的脚本的问题。
你的 python 代码看起来只是在生成一个 html 为什么你不用 PHP 来做呢？

标签： php python html linux shell

【解决方案1】：

我认为问题在于 PHP 在错误的位置寻找脚本。

您可以使用getcwd() 获取当前工作目录。检查您是否使用了当前工作目录中脚本的正确相对路径。

否则，您可以简单地将脚本的绝对路径传递给exec() 命令。

下一个问题是你的 shell 脚本打印了很多行并以标签</table></th> 结尾。 exec() 函数仅返回 shell 脚本输出的最后一行。所以 PHP 输出将只显示</table></th>。这不能在 HTML 中呈现，因为它们只是结束标记。因此，您在浏览器中看不到任何变化，但如果您检查 HTML，您会注意到它。

相反，您可以使用 shell_exec() 返回整个 shell 脚本的输出。

这里是更正的版本：

<?php 
// 1.Remove the leading dot. The leading dot makes the path relative.
// 2.Use shell_exec instead to get all lines from your script output.
echo shell_exec('/var/www/html/newdongs/fetch_html.sh'); 
?>

【讨论】：

将脚本的绝对路径传递给 exec() 是什么意思？
绝对路径是从根文件夹到脚本的路径。相对路径是从当前工作目录到脚本的路径
好吧，我以为你在说什么。我仍然没有得到你的更正的 php 回报。
我编辑了帖子并添加了一个执行相同的示例 php 文件，该文件运行良好。
重新启动服务器后，php 完美地执行了脚本。好奇怪