./test_bash.sh: line 13: ./test.txt: Permission denied

我试图更改权限chmod 777 test_bash.sh,试图修改sudoers.d文件,试过这个：shell_exec(“echo password_for_the_user | sudo -S command_to_execute”); …但是Bash脚本无法编写test.txt文件.

这是我的基本代码,首先是PHP代码：

<?PHP 
$var1 = json_decode($_POST['var1']); //from front-end html5
$var2 = json_decode($_POST['var2']);
$var3 = json_decode($_POST['var3']);

$response = shell_exec("./test_bash.sh $var1 $var2 $var3 2>&1");

echo "$response";
?>

其次,Bash代码：

#!/bin/bash

var1=$1;
var2=$2;
var3=$3;

echo "$var1";
echo "$var2";
echo "$var3";

echo $var1 $var2 $var3 > ./test.txt