Allowed memory size of 134217728 bytes exhausted (tried to allocate 62918656 bytes)

I am facing problem Memory size exhausted in laravel 5.8. And memory size set as default (memory_limit 128M) in php.ini file. but not working. and i did not converted any file ...

when I used print_r ($request); I face this problem but echo used no show error.

Route::post('/add/category/insert', 'CategoryController@addcategoryinsert');

public function addcategoryinsert(Request $request) { print_r ($request);enter code here }

via Chebli Mohamed