PHP workshop for 2 days with Shopware, Sylius, PHPUnit and Codeception in Duisburg

The Generator class

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

Introduction

Generator objects are returned from generators.

Caution

Generator objects cannot be instantiated via new.

Class synopsis

class Generator implements Iterator {
/* Methods */
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
}

See Also

See also object iteration.

Table of Contents

add a note add a note

User Contributed Notes 1 note

up
7
Pistachio
5 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:

<?php
function 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
To Top