em411's blog

Common naming patterns in programming

Thu, 27 Apr 2023 00:00:00 +0000

Name	Description
Accumulator	Classes that accumulate or collect data over time, e.g., SumAccumulator, ErrorAccumulator.
Adapter	Classes that adapt or convert interfaces or data between two systems, e.g. DatabaseAdapter, APIAdapter.
Aggregator	Classes that aggregate or collect data from multiple sources, e.g., NewsAggregator, DataAggregator.
Allocator	Classes that allocate or assign resources, e.g., MemoryAllocator, TaskAllocator.

Environment Variable Processors

Fri, 12 Aug 2022 00:00:00 +0000

Environment Variable Processors

# config/packages/framework.yaml

parameters:
 env(TRUSTED_HOSTS): "10.0.0.1,10.0.0.2"
framework:
 trusted_hosts: '%env(csv:TRUSTED_HOSTS)%'

From now, you don’t need to use explode 💥

Source: https://symfony.com/doc/4.4/configuration/env_var_processors.html

Useful PHP functions

Fri, 12 Aug 2022 00:00:00 +0000

checkdnsrr()

With this function you can check the DNS records for an IP or hostname that you can pass to the function as a param. A really good use case is to check if the domain of a given email address exists.

<?php

function validateMail(string $email): bool
{
 $parts = explode("@", $email);
 $host = end($parts);
 return checkdnsrr($host, 'MX');
}

$email = 'harry.weber@gmail.com';

validateMail($email);

This helps you to avoid bounce emails trying to create an account on your website or platform.