composer-install.php

<?php

die ('This is not executable now! Please comment out this line.');

$config = array(
    'url'  => 'https://getcomposer.org/composer.phar',
    'dir'  => __DIR__ . '/composer',
    'bin'  => __DIR__ . '/composer/composer.phar',
    'json' => __DIR__ . '/composer/composer.json',
    'command' => 'install' // The composer command update/install
);

error_reporting(
    E_ALL & ~E_NOTICE & ~E_USER_NOTICE & ~E_DEPRECATED & ~E_USER_DEPRECATED
    & ~E_WARNING & ~E_CORE_WARNING & ~E_USER_WARNING & ~E_STRICT
);


// Composer self update
copy($config['url'], $config['bin']);

require_once "phar://{$config['bin']}/src/bootstrap.php";

chdir($config['dir']);
putenv("COMPOSER_HOME={$config['dir']}");
putenv("OSTYPE=OS400"); //force to use php://output instead of php://stdout
$app = new \Composer\Console\Application();

$factory = new \Composer\Factory();
$output  = $factory::createOutput();

$input = new \Symfony\Component\Console\Input\ArrayInput(
    array(
        'command' => $config['command'],
    )
);
$input->setInteractive(true);
echo "<pre>";
$cmdret = $app->doRun($input, $output); //unfortunately ->run() call exit() so we use doRun()
echo "end!";