Examples:
GET - http://localhost/crud-php-mysql/api/index_api.php
GET - http://localhost/crud-php-mysql/api/index_api.php?id={id}
POST - http://localhost/crud-php-mysql/api/add_api.php
{
"title":"Title",
"price":"300"
}
DELETE - http://localhost/crud-php-mysql/api/delete_api.php
{
"id":"9"
}
PUT - http://localhost/crud-php-mysql/api/edit_api.php
{
"id":"2",
"title":"Another"
}