foreignidfor in laravel code example

Example 1: laravel foreign key

Schema::table('posts', function (Blueprint $table) {
    $table->unsignedBigInteger('user_id');

    $table->foreign('user_id')->references('id')->on('users');
});
OR
Schema::table('posts', function (Blueprint $table) {
    $table->foreignId('user_id')->constrained();
});

Example 2: laravel remove foreign key

$table->dropForeign('posts_user_id_foreign');

Example 3: laravel longblob migration

DB::statement("ALTER TABLE <table name> ADD <column name> MEDIUMBLOB");