PHP8的新特性及其底层开发原理：创建出色的Web应用程序

<?php
class MyClass {
    public function myMethod(int $count): void {
        for ($i = 0; $i < $count; $i++) {
            echo $i;
        }
    }
}
 
$object = new MyClass();
$object->myMethod(100000);
?>

<?php
function sum(int $a, int $b): int {
    return $a + $b;
}
?>

<?php
class MyClass {
    private string $name;
    protected int $age;
    public float $salary;
    
    // ...
}
?>

<?php
// rtrim函数，默认会将字符串末尾的空格去除
$str = "Hello World ";
echo rtrim($str);

// array_push函数，将元素添加到数组末尾
$fruits = ["apple", "banana"];
array_push($fruits, "cherry");
print_r($fruits);
?>

<?php
$object = new class(10) {
    private int $num;
    
    public function __construct(int $num) {
        $this->num = $num;
    }
    
    public function getNum(): int {
        return $this->num;
    }
};

echo $object->getNum();
?>