PHP Cheat Sheet

<?php$age = 30;$name = "Ada";$pi = 3.14159;if ($age >= 18) {    echo "$name is an adult\n";}for ($i = 0; $i < 5; $i++) {    echo "Count: $i\n";}?>

<?php$nums = [5, 3, 1, 4, 2];sort($nums);                      // [1, 2, 3, 4, 5]$ages = ["Alice" => 30, "Bob" => 25];  // associative array$ages["Carol"] = 28;echo $ages["Alice"];              // 30$doubled = array_map(fn($n) => $n * 2, $nums);$evens = array_filter($nums, fn($n) => $n % 2 === 0);?>

<?phpclass Person {    public string $name;    private int $age;    public function __construct(string $name, int $age) {        $this->name = $name;        $this->age = $age;    }    public function greet(): string {        return "Hello, {$this->name}";    }}$p = new Person("Ada", 30);echo $p->greet();?>