nexusphp/database/migrations/2021_06_08_113437_create_links_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateLinksTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        if (Schema::hasTable('links')) {
            return;
        }
        Schema::create('links', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name', 30)->default('');
            $table->string('url')->default('');
            $table->string('title', 50)->default('');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('links');
    }
}