What are some considerations for code quality and readability when developing open-source projects in PHP?

When developing open-source projects in PHP, it is important to prioritize code quality and readability to ensure that other developers can easily understand and contribute to the project. Some considerations include following coding standards, using meaningful variable names, writing clear and concise comments, and breaking down complex logic into smaller, reusable functions. Example PHP code snippet demonstrating the use of meaningful variable names and clear comments:

<?php

// Calculate the sum of two numbers
function calculateSum($num1, $num2) {
    $sum = $num1 + $num2; // Calculate the sum
    return $sum;
}

$number1 = 10;
$number2 = 20;

$result = calculateSum($number1, $number2);
echo "The sum of $number1 and $number2 is: $result";