resources/database/migrations/2015_10_23_115748_create_forms.php
public function down()
    {
        DB::statement('SET FOREIGN_KEY_CHECKS=0;');
        if (Schema::hasTable('tbl_forms_config')) {
            Schema::table('tbl_forms_config', function(Blueprint $table) {
                $table->dropForeign('tbl_forms_config_ibfk_2');
                $table->dropForeign('tbl_forms_config_ibfk_3');
                $table->dropForeign('tbl_forms_config_ibfk_4');
            });
            Schema::drop('tbl_forms_config');
        }
        if (Schema::hasTable('tbl_forms')) {
            Schema::table('tbl_forms', function(Blueprint $table) {
                $table->dropForeign('tbl_forms_ibfk_1');
                $table->dropForeign('tbl_forms_ibfk_2');
            });

            Schema::drop('tbl_forms');
        }
        DB::statement('SET FOREIGN_KEY_CHECKS=1;');
    }
public function down()
    {
        DB::statement('SET FOREIGN_KEY_CHECKS=0;');
        if (Schema::hasTable('tbl_forms_config')) {
            Schema::table('tbl_forms_config', function(Blueprint $table) {
                $table->dropForeign('tbl_forms_config_ibfk_2');
                $table->dropForeign('tbl_forms_config_ibfk_3');
                $table->dropForeign('tbl_forms_config_ibfk_4');
            });
            Schema::drop('tbl_forms_config');
        }
        if (Schema::hasTable('tbl_forms')) {
            Schema::table('tbl_forms', function(Blueprint $table) {
                $table->dropForeign('tbl_forms_ibfk_1');
                $table->dropForeign('tbl_forms_ibfk_2');
            });

            Schema::drop('tbl_forms');
        }
        DB::statement('SET FOREIGN_KEY_CHECKS=1;');
    }
Reverse the migrations.

@return void