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@ 2021-12-13T18:18:55Z

<?php

function async(callable $call): Fiber {
    $fiber = new Fiber($call);

    $fiber->start();
    
    return $fiber;
}



function all(Fiber ...$fibers): array
{
    $all_terminated = function() use($fibers) {
        foreach($fibers as $fiber) {
            if (!$fiber->isTerminated()) {
                return false;
            }
            
        }
        
        return true;
    };
    
    while(!$all_terminated()) {
        foreach($fibers as $fiber) {
            if($fiber->isSuspended()) {
                $fiber->resume();
            }
        }
    }
    
    $res = [];
    foreach($fibers as $fiber) {
        $res[] = $fiber->getReturn();
    }
}

function await(Fiber $fiber): mixed
{
    while($fiber->isSuspended()) {
        $fiber->resume();
    }
    
    return $fiber->getReturn();
}

$a =  async(function(): string {
    ob_start();
    
    // v- called from layout.html.twig
    Fiber::suspend();
    
    echo '<-- part 1 - layout -->';
    
    return ob_get_clean();
});

$b = async(function(): string {
    ob_start();
    
    // v- called from layout.html.twig
    Fiber::suspend();
    
    echo '<-- part 2 - layout -->';
    
    return ob_get_clean();
});

all($a, $b);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: all(): Return value must be of type array, none returned in /in/Zchtr:38 Stack trace: #0 /in/Zchtr(71): all(Object(Fiber), Object(Fiber)) #1 {main} thrown in /in/Zchtr on line 38
Process exited with code 255.

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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