PHP exec not work on PHP 7.2.34

[nitiphone2021]

Hi all.

I tried to execute command below
` echo '<br/>'.$data. " >=> " . exec("java -jar encrypt.jar ".$data." ".$privateKey, $key);`
it's look like we run `java -jar encrypt.jar 192.168.101.1BBB10052 ssdsds`
I can run this command on the server by ssh but when I use PHP code, it's nothing.
so I need to enale the exec function or different command on this version?

[requinix]

Is exec() enabled? Can you run other commands? Simple commands?
Is the command exactly what you think it is? You've confirmed $data and $privateKey have the values you think they have?
Are you executing this from the right directory? Do commands like is_file() think that "encrypt.jar" exists where you expect?

[nitiphone2021]

yes, I reading on PHP document. seem I need to enable exec command? How to enable it? like PHP extension?

[requinix]

No. Do the other troubleshooting steps first. If it turns out that the answer is that exec() is disabled then we can deal with that. Because that is probably not the problem.

[nitiphone2021]

yes, I run only easy command but still not work

<?php
  
// Use ls command to shell_exec
// function
$output = shell_exec('ls');
  
// Display the list of all file
// and directory
echo "HERE = " . $output;
?>

 

[requinix]

What does

var_dump($output);

show? Any errors in the error log? Add

error_reporting(-1);
ini_set("display_errors", true);

at the top of the file and try again.

[nitiphone2021]

Warning: shell_exec() has been disabled for security reasons in /home/cp227590/public_html/bdb.com.la/phpinfo.php on line 8

Error message

[requinix]

Looks like you're on shared hosting. Contact your host to see if you can get that restriction lifted, but don't hold your breath.

[nitiphone2021]

Now I enable it but seem I can't run only java

       
echo "linux = '" . exec("ls -l") . "'";
echo "<br>java = '" . exec("/usr/bin/java -version") . "'";
       

Linux command can work but java not work

[root@host ~]# which java
/usr/bin/java
[root@host ~]# 

I tried like this but not work

[nitiphone2021]

[root@host ~]# java -version
openjdk version "1.8.0_292"
OpenJDK Runtime Environment (build 1.8.0_292-b10)
OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)
[root@host ~]# 
[root@host ~]# 
[root@host ~]# 
[root@host ~]# /usr/bin/java -version
openjdk version "1.8.0_292"
OpenJDK Runtime Environment (build 1.8.0_292-b10)
OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)
[root@host ~]# 

 

[nitiphone2021]

Updated!!!!!

Updated!!
Now I can execute java command like java -version
but can't execute jar file

 echo exec("/usr/bin/java -version 2>&1",$output); // Output work
echo "<br>";
echo exec("/usr/bin/java -jar encrypt.jar ".$data." ".$privateKey . " 2>&1",$key);

Result:

OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)
Error: Unable to access jarfile encrypt.jarArray ( [0] => Error: Unable to access jarfile encrypt.jar )

In the same command, I can run it on my laptop can work properly

the file encrypt.jar permission is 777

[requinix]

Back to one of the questions I asked earlier: are you sure PHP is running from the correct location? Does glob/scandir/ls without any path information include encrypt.jar? Are file permissions correct such that Apache and/or PHP can properly access the file?

In other words, does

var_dump(is_readable("encrypt.jar"));

output true?

[nitiphone2021]

Now I can exec the command.
my point is 
1. exec command not allow on php.ini
2. on PHP can't call java command by "java" need to put full location
3. path of jar file, my PHP file and java file in the path but I can't call it like javafile.jar need to put full path.
`exec("/usr/bin/java -jar /home/public_html/believe.com/CoVaF/func/encrypt.jar `

Thank you all for support