Create phar file

compile.php

<?php
// this compile.php file above of html folder
try {
    $pharFile = 'app.phar';
    // clean up
    if (file_exists($pharFile)){
        unlink($pharFile);
    }

    if (file_exists($pharFile . '.gz')){
        unlink($pharFile . '.gz');
    }

    // create phar
    $phar = new Phar($pharFile);
    // start buffering. Mandatory to modify stub to add shebang
    $phar->startBuffering();
    // Create the default stub from main.php entrypoint inside html
    $defaultStub = $phar->createDefaultStub('main.php');
    // Add the rest of the apps files
    $phar->buildFromDirectory(__DIR__ . '/html');
    // Customize the stub to add the shebang
    $stub = "#!/usr/bin/env php \n" . $defaultStub;
    // Add the stub
    $phar->setStub($stub);
    $phar->stopBuffering();

    // plus - compressing it into gzip  
    $phar->compressFiles(Phar::GZ);
    # Make the file executable
    chmod(__DIR__ . "/{$pharFile}", 0770);
    echo "$pharFile successfully created" . PHP_EOL;
} catch (Exception $e){
    echo $e->getMessage();
}

decompile.php

<?php
$phar = new Phar('app.phar');
$phar2 = $phar->convertToExecutable (Phar::TAR,Phar::NONE); // Convert to an uncompressed tar archive
$phar2->extractTo('out/'); // Extract all files