• PSR-1: Basic Coding Standard

    Naming Conventions

    Classes: StudlyCaps

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    class ClassName {
    // ...
}

    Methods: camelCase

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    class ClassName {
    public function methodName() {
        // ...
    }
}

    Constants: UPPER_CASE_WITH_UNDERSCORES

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    class ClassName {
    const CONSTANT_NAME = 'value';
}

    PSR-2: Coding Style Guide

    Coding Styling:

    • Indentation: 4 spaces(as the tab)
    • Opening brances for new class: on the new line
    • Control structure should be followed by: single space (if / else / while)
    • Function structure should: not have space (after the function name)
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    class ClassName
{
    public function methodName($arg1, $arg2)
    {
        if ($arg1 === $arg2) {
            return true;
        } else {
            return false;
        }
    }
}

    PSR-4: Autoloading Standard

    PSR-4 is a modern autoloading standard that simplifies the process of including PHP files in your codebase. It requires:

    • A one-to-one relationship between class names and file paths.
    • Namespace declarations to match the directory structure.
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    // -------------------------------------------
// File: src/ExampleNamespace/ExampleClass.php

namespace ExampleNamespace;

class ExampleClass
{
    // ...
}

// -------------------------------------------
// Usage of the ExampleClass.php File

require 'vendor/autoload.php';

use ExampleNamespace\ExampleClass;

$example = new ExampleClass();

    Reference: https://reintech.io/blog/php-and-psr-standards-writing-clean-and-compatible-php-code