生成器类

    (PHP 5 >= 5.5.0, PHP 7, PHP 8)

    简介

    Generator 对象是从 generators返回的.

    警告

    Generator 对象不能通过 new 实例化.

    类摘要

    final class Generator implements Iterator {
    /* 方法 */
    public current(): mixed
    public getReturn(): mixed
    public key(): mixed
    public next(): void
    public rewind(): void
    public send(mixed $value): mixed
    public throw(Throwable $exception): mixed
    public valid(): bool
    public __wakeup(): void
    }

    参见

    也可以参考 遍历对象。

    目录

    发现了问题？

    了解如何改进此页面 • 提交拉取请求 • 报告一个错误
    ＋添加备注

    用户贡献的备注 1 note

    up
    32
    Pistachio
    9 years ago
    Unlike return, yield can be used anywhere within a function so logic can flow more naturally. Take for example the following Fibonacci generator:<?phpfunction fib($n){    $cur = 1;    $prev = 0;    for ($i = 0; $i < $n; $i++) {        yield $cur;        $temp = $cur;        $cur = $prev + $cur;        $prev = $temp;    }}$fibs = fib(9);foreach ($fibs as $fib) {    echo " " . $fib;}// prints: 1 1 2 3 5 8 13 21 34
    ＋添加备注
    To Top