RHEL 8.6下NGINX+PHP无法通过Web执行Bash脚本求助

我是PHP编程新手，可能犯了低级错误。在RHEL 8.6系统上部署NGINX与PHP环境后，编写了一个基础PHP脚本，但exec函数始终无法执行目标bash脚本。以下是相关文件内容与排查信息：

相关文件内容 #

test.php（路径：/usr/share/nginx/test.php） #

<!DOCTYPE html>
<html>
<?php
  exec('/usr/share/nginx/html/ip.sh 2>&1');
  $myFile = "/tmp/ip.txt";
  $fh = fopen($myFile, 'r');
  $theData = fread($fh, filesize($myFile));
  fclose($fh);
  echo nl2br($theData);
?>
</body>
</html>

ip.sh（路径：/usr/share/nginx/html/ip.sh） #

#!/bin/sh

ip a > /tmp/ip.txt
chown nginx:nginx /tmp/ip.txt

排查信息 #

• 文件权限：

-rwxr-xr-x. 1 nginx nginx   60 Aug 26 08:36 ip.sh
-rwxr-xr-x. 1 nginx nginx  920 Aug 26 10:59 test.php

• 进程运行身份：NGINX和PHP-FPM均以nginx:nginx身份运行

root     1507889       1  0 10:56 ?        00:00:00 nginx: master process /usr/sbin/nginx
nginx    1507890 1507889  0 10:56 ?        00:00:00 nginx: worker process
nginx    1507891 1507889  0 10:56 ?        00:00:00 nginx: worker process
nginx    1507892 1507889  0 10:56 ?        00:00:00 nginx: worker process
nginx    1507893 1507889  0 10:56 ?        00:00:00 nginx: worker process

• SELinux状态：

-rwxr-xr-x. 1 nginx nginx unconfined_u:object_r:httpd_sys_content_t:s0   60 Aug 26 08:36 ip.sh
-rwxr-xr-x. 1 nginx nginx unconfined_u:object_r:httpd_sys_content_t:s0  920 Aug 26 10:59 test.php

• sudoers配置：已在/etc/sudoers中添加

nginx ALL=(user) NOPASSWD: /usr/share/nginx/html/ip.sh

恳请各位帮忙解决这个问题！

内容的提问来源于stack exchange，提问作者quarksrus