About php : Running-AMC-auto-multiple-choice-commands-via-php

New to amc auto multiple choice, Automated exam paper based correction I discovered its good functionalities and then decided to build a simple interface in PHP to launch script commands.
Well, kept reading many topics in forums and found amc-mill.zip which is simplifying procedures.
so, my experience with this stopped at the level below:

1. changed htdocs/www directory to point to folder Projects-QCM
2. extracted amc-mill.zip inside the folder.
3. tested php file:interface.php

<?php
    // Get current directory
    echo getcwd() . "<br>";

    // Change directory
    chdir("../amc-mill/ui-scripts");

    // Get current directory
    echo getcwd();
    echo "</br>";
    //**phpdirectamccommandline=Name of the project** **standard=Template**                                                                      
    $output = exec("bash ./01.new-project.sh **phpdirectamccommandline** **standard**");

    $output2 = exec("bash ./02.prepare-subject.sh phpdirectamccommandline");
    $output3 = exec("bash ./03.update-marking.sh phpdirectamccommandline");
    $output4 = exec("bash ./04.detect-layouts.sh phpdirectamccommandline");
    $output5 = exec("bash ./05.print-copies.sh phpdirectamccommandline");

?>

RESULT= stopping @ ./02.prepare-subject.sh phpdirectamccommandline”
With Php nothing executed.
With terminal= command successful.

Another attempt:

<?php
    // Get current directory
    echo getcwd() . "&lt;br&gt;";

    // Change directory
    chdir("../");

    // Get current directory
    echo getcwd();
    echo "</br>";
    //$output = exec("bash ./new-project.sh phpdirectamccommandline");
    chdir("phpdirectamccommandline");

    $output2 = shell_exec("auto-multiple-choice prepare --mode s --prefix ./ ./source.tex \
    --out-sujet DOC-subject.pdf \
    --out-corrige DOC-correction.pdf \
    --data ./data \ 
    --out-calage DOC-calage.xy");

    echo $output2;
    echo getcwd();

?>

Conclusion: I checked everything. www-data/whoami/sudoers/chown root/ but I still don’t get any result.

Can some contributor help with clear steps to execute a sequence of bash commands using PHP and check true or false it had been executed. (Remark: Once sequence 2 is executed using the terminal, some files are created. We can see them in the file manager. So no need to get output from.

thanks, everyone.