table drop foreign php laravel

1Schema::table('posts', function (Blueprint $table) {
2	$table->dropForeign(['category_id']);
3});

1$table->dropForeign('posts_user_id_foreign');

1// Searched, laravel drop foreign column
2Schema::table('users', function (Blueprint $table) {
3    $table->dropColumn(['votes', 'avatar', 'location']);
4});

1$table->dropIndex(['state']); // Drops index 'geo_state_index'

1 public function down()
2 {
3   Schema::table('tarefas', function (Blueprint $table) {
4     $table->dropForeign('tarefas_user_id_foreign');
5
6     $table->dropColumn('user_id');
7   });
8 }

1Schema::table('admins', function (Blueprint $table) {    $table->dropForeign('admins_post_id_foreign');    $table->dropColumn('post_id');});