woprrr

<?php

/**
 * Class MySingleton.
 */
class MySingleton
{
    private static $instance;

    private function __construct() {}

woprrr

function flatten($items)
{
    $result = [];
    foreach ($items as $item) {
        if (is_array($item)) {
            $result = array_merge($result, array_values($item));
            continue;
        }

        $result[] = $item;

woprrr

<?php

function isPrime(int $number): bool
{
    $boundary = floor(sqrt($number));
    $i = 2;
    do {
        if (($number % $i) === 0) {
            return false;
        }

woprrr

<?php

$elements = [];
for($i = 0; $i < 100000; $i++) {
	$elements[] = (string)rand(10000000, PHP_INT_MAX);
}

function testArrayWalk($array) {
    $time_start = microtime(true);
    $element = array_walk($array, 'test_walking');

woprrr

<?php
function writeln($line_in) {
    echo $line_in." \n";
}

class Test {
    public $number;
    
    function __construct(int $number)
    {

woprrr

<?php

# Forget array_merge PHP 7.4 Spread Operator in Array Expression.

# ONLY FOR PHP 7.4 +

#/!\ PERFORMANCE BEST PRACTIVE /!\
$args = ['foo', 'bar', 'baz'];
$arr = [...$args, 'buz'];
var_dump($arr);

woprrr

<?php
# Arrow Functions 2.0 `Short Closures`

# OLD WAY (PHP < 7.4 )
function cube($arg){
	return ($arg * $arg * $arg);
}

$b = array_map('cube', range(1, 5));
var_dump('Short closure old syntax', $b);

woprrr

<?php
# Null Coalescing Assignment Operator

# OLD WAY (PHP < 7.4 )
$data['comments']['user_id'] = $data['comments']['user_id'] ?? 'PlaceHoldered value...';
var_dump($data['comments']['user_id']);
$data = null;

# PHP 7.4 + syntax to use new assigment operator without unecessary tests.
$data['comments']['user_id'] ??= 'PlaceHoldered value...';

woprrr

<?php
# Typed Properties 2.0

# OLD WAY (PHP < 7.4 )
class User {
	public $id;
	public $name;
	
	public function __construct(int $id, string $name) {
	    $this->id = $id;

woprrr

<?php

namespace App\Repository;

use App\Entity\YourEntity;
use Doctrine\{Common\Collections\Criteria, ORM\QueryBuilder};
use Knp\Component\Pager\Pagination\PaginationInterface;

/**
 * class BaseYourEntityRepositoryDecorator.