PHP8 の新しい文法機能について話しましょう

function test($name, $age='18', $sex='男') {
    echo $name . '-------' . $age . '--------'. $sex;
}
test('Landy', age: 20, sex: '女'); //Landy-------20--------女

test('Landy', sex: '女'); //Landy-------18--------女

test(age: 30, sex: '女', name: 'tom'); //tom-------30--------女

<?php
class Person {
    public static function test($name, $age) {
        echo $name.&#39;|&#39;.$age;
    }
}

Person::test(age:100, name:'Landy'); //Landy|100

function test1($arg1,$arg2, ...$args) {
    print_r($args);
}
test1(1,2, name:'Landy', age:11, sex:2);
Array
(
    [name] => Landy
    [age] => 11
    [sex] => 2
)

$a = 8.0;
echo match($a) {
    8.0 => '匹配8.0',
    '8.0' => 'test 8.0',
    default => '没有匹配值'
};  //匹配8.0

function test3() {
    return 8.0;
}
$a = 8.0;
echo match($a) {
    test3() => '匹配函数',
    8.0 => '匹配8.0',
    '8.0' => 'test 8.0',
    9,10,11 => '多次匹配', //多次匹配
    default => '没有匹配值'
};  //匹配函数

class Point {
  public function __construct(
    public float $x = 1.0,
    public float $y = 2.0,
    public float $z = 3.0,
  ) {}
}
echo (new Point())->x; // 1