4.0.0-alpha.php

 <?php
    use Illuminate\Database\Capsule\Manager as Capsule;
    use Illuminate\Database\Schema\Blueprint;
    /**
     * Comments Column
     */
    if (!$schema->hasColumn('users', 'comments')) {
        $schema->table('users', function(Blueprint $table)
        {
    $table->string('comments');
        });
        echo "Created column 'comments'..." . PHP_EOL;
        } else {
        echo "Column 'comments' already exists.  Skipping..." . PHP_EOL;
     }