nikic

Why objects (usually) use less memory than arrays in PHP

This is just a small post in response to [this tweet][tweet] by Julien Pauli (who by the way is the release manager for PHP 5.5). In the tweet he claims that objects use more memory than arrays in PHP. Even though it can be like that, it's not true in most cases. (Note: This only applies to PHP 5.4 or newer.)

The reason why it's easy to assume that objects are larger than arrays is because objects can be seen as an array of properties and a bit of additional information (like the class it belongs to). And as array + additional info > array it obviously follows that objects are larger. The thing is that in most cases PHP can optimize the array part of it away. So how does that work?

The key here is that objects usually have a predefined set of keys, whereas arrays don't:

EmanueleMinotto

Microframework

Moved to: https://github.com/EmanueleMinotto/crystal

Read more: https://github.com/EmanueleMinotto/crystal/wiki

igorw

<?php

$factorial = call_user_func(
    function ($le) {
        return call_user_func(
            function ($f) {
                return $f($f);
            },
            function ($f) use ($le) {
                return $le(function ($x) use ($f) {

igorw

React v0.2.4 is more awesome

DNS promises

This release has two major improvements. The first one is that react/dns is now using a promise based API. In case you missed it, react/promise is a PHP library for promises. Take a look at the README and familiarize yourself with it, as it will be used by many libs in the react ecosystem, including core.

The previous API was:

$dns->resolve('igor.io', function ($ip) {

echo "Yay, the IP is $ip.\n";

Ocramius

<?php
class A{
        protected $b;
        function __construct() {unset($this->b);}
        function __get($name){
                echo $name;
                return $this->$name;
        }
}
$a = new A;

nikic

In order to get a bit of "hard data" on what accessors will actually be used for once they are introduced I wrote a small script that scans through a codebase, finds all getter and setter methods and checks them for various characteristics. (The analyze.php file in this Gist.)

Here are the results of running it on a Symfony (Standard) skeleton.

absoluteTotal        => 18516 (486.6%)
total                =>  3805 (100.0%)
skipped              =>   124 (  3.3%)

bakura10

// Use Reflection

// if by_val === true (or by_reference === false)

extract :
	$data = array();
	for every elements in object
		getter = getElementName

		if element is scalar (object or primitive type)

Ocramius

<?php
/**
 * Created by JetBrains PhpStorm.
 * User: Marco Pivetta
 * Date: 16.08.12
 * Time: 11:05
 * To change this template use File | Settings | File Templates.
 */
class CriteriaTest extends \PHPUnit_Framework_TestCase
{

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

Ocramius

<?php

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * @ORM\Entity()
 * @ORM\Table(name="user")
 */
class User