devnix

Handling optional input parameters in PHP with vimeo/psalm and azjezz/psl

I had an interesting use-case with a customer for which I provide consulting services: they needed multiple fields to be marked as "optional".

Example: updating a user

We will take a CRUD-ish example, for the sake of simplicity.

For example, in the following scenario, does a null $description mean "remove the description",

devnix

{#
    Parameters:
      * total (int): number of pages
      * current (int): current pages
      * url (string): route name & query (string): route parameter
        ex: list/page-5?q=myFilter (5 = page and query = myFilter)
      * nearbyPagesLimit (int) optional: limit of pages around the current page
#}

{% macro pagination(total, current, url, nearbyPagesLimit = 4) %}

devnix

<?php

function color_meter($cwith, $ccolor) {
    if (empty($cwith) || empty($ccolor)) return false;
    
    $_cwith  = ($cwith[0] === '#') ? substr($cwith, 1, 7) : $cwith;
    $_ccolor  = ($ccolor[0] === '#') ? substr($ccolor, 1, 7) : $ccolor;

    $_r = intval(substr($_cwith, 0, 2), 16);
    $_g = intval(substr($_cwith, 2, 2), 16);