0UT1S's

<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);

// Define installation directory for CKEditor
$installDir = __DIR__ . '/ckeditor';

// Composer binary path
$composerBinary = __DIR__ . '/composer.phar';

// Function to check if Composer is installed
function isComposerInstalled($composerBinary)
{
    return file_exists($composerBinary);
}

// Function to download Composer
function downloadComposer($composerBinary)
{
    echo "Downloading Composer...\n";
    $composerUrl = 'https://getcomposer.org/installer';

$installer = fopen($composerUrl, 'rb');
    if ($installer === false) {
        die("Error: Could not download Composer.\n");
    }

$composerFile = fopen($composerBinary, 'wb');
    if ($composerFile === false) {
        die("Error: Could not create Composer file.\n");
    }

while (!feof($installer)) {
        fwrite($composerFile, fread($installer, 8192));
    }

fclose($installer);
    fclose($composerFile);

echo "Composer downloaded successfully.\n";
}

// Make Composer executable (on Unix-based systems)
function makeComposerExecutable($composerBinary)
{
    // This will only work on Unix-based systems, not Windows
    if (stripos(PHP_OS, 'WIN') === false) {
        echo "Setting executable permissions...\n";
        chmod($composerBinary, 0755);
        echo "Permissions set.\n";
    }
}

// Set COMPOSER_HOME environment variable if needed
function setComposerHome()
{
    $composerHome = __DIR__ . '/composer_home';
    if (!file_exists($composerHome)) {
        mkdir($composerHome, 0700);
    }

putenv('COMPOSER_HOME=' . $composerHome);
    echo "Setting COMPOSER_HOME environment variable...\n";
}

// Run Composer install
function runComposerInstall($composerBinary, $installDir)
{
    echo "Running Composer install...\n";
    exec("php $composerBinary install --working-dir=" . escapeshellarg($installDir) . " 2>&1", $output, $returnVar);

if ($returnVar !== 0) {
        echo "Error: Composer install failed.\n";
        echo "Output:\n" . implode("\n", $output) . "\n";
    } else {
        echo "Composer install completed successfully.\n";
    }
}

// Check if Composer is installed, and if not, download it
if (!isComposerInstalled($composerBinary)) {
    downloadComposer($composerBinary);
    makeComposerExecutable($composerBinary);
    setComposerHome();
}

// Proceed with CKEditor installation
if (is_dir($installDir)) {
    echo "CKEditor is already installed in '$installDir'. Please remove this directory if you want to reinstall.\n";
    exit;
}

// Create the directory for CKEditor installation
if (!mkdir($installDir, 0777, true)) {
    echo "Failed to create directory $installDir. Check your file permissions.\n";
    exit;
}

// Set up Composer configuration for CKEditor
$composerJson = [
    'name' => 'ckeditor5/ckeditor5-build-classic',
    'description' => 'CKEditor 5 build for Classic editor with ImageUpload',
    'require' => [
        '@ckeditor/ckeditor5-build-classic' => '^39.0',
        '@ckeditor/ckeditor5-upload' => '^39.0'
    ]
];

// Write the composer.json file
file_put_contents($installDir . '/composer.json', json_encode($composerJson, JSON_PRETTY_PRINT));

// Run Composer install command to download CKEditor and dependencies
runComposerInstall($composerBinary, $installDir);

// Configure CKEditor build to support Image Upload
echo "Configuring CKEditor for Image Upload...\n";

// Create the custom build of CKEditor
$ckeditorJs = <<<'JS'
import ClassicEditor from '@ckeditor/ckeditor5-build-classic';
import Image from '@ckeditor/ckeditor5-image/src/image';
import ImageUpload from '@ckeditor/ckeditor5-upload/src/imageupload';

ClassicEditor
    .create(document.querySelector('#editor'), {
        plugins: [Image, ImageUpload],
        toolbar: ['imageUpload', 'undo', 'redo', 'bold', 'italic', 'link'],
        simpleUpload: {
            uploadUrl: '/admin/upload_image.php',
            headers: {
                'X-CSRF-TOKEN': '<?= $_SESSION['csrf_token'] ?>'
            }
        }
    })
    .catch(error => {
        console.error('Error initializing CKEditor:', error);
    });
JS;

file_put_contents($installDir . '/ckeditor-config.js', $ckeditorJs);

echo "CKEditor configuration for image upload is complete.\n";

// Final instructions to the user
echo "CKEditor has been installed successfully at '/admin/ckeditor'.\n";
echo "You can now use CKEditor with the Image Upload functionality.\n";
echo "Please configure the image upload handler (upload_image.php) as needed.\n";
echo "Make sure the directory permissions are set correctly for file uploads.\n";
?>

By Order of Mr.0UT1S