PHP code example of kawakami-o3 / co

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

kawakami-o3 / co example snippets

function curl_init_with(string $url, array $options = [])
{
    $ch = curl_init();
    $options = array_replace([
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
    ], $options);
    curl_setopt_array($ch, $options);
    return $ch;
}
function get_xpath_async(string $url) : \Generator
{
    $dom = new \DOMDocument;
    @$dom->loadHTML(yield curl_init_with($url));
    return new \DOMXPath($dom);
}

var_dump(Co::wait([

    'Delay 5 secs' => function () {
        echo "[Delay] I start to have a pseudo-sleep in this coroutine for about 5 secs\n";
        for ($i = 0; $i < 5; ++$i) {
            yield Co::DELAY => 1;
            if ($i < 4) {
                printf("[Delay] %s\n", str_repeat('.', $i + 1));
            }
        }
        echo "[Delay] Done!\n";
    },

    "google.com HTML" => curl_init_with("https://google.com"),

    "Content-Length of github.com" => function () {
        echo "[GitHub] I start to request for github.com to calculate Content-Length\n";
        $content = yield curl_init_with("https://github.com");
        echo "[GitHub] Done! Now I calculate length of contents\n";
        return strlen($content);
    },

    "Save mpyw's Gravatar Image URL to local" => function () {
        echo "[Gravatar] I start to request for github.com to get Gravatar URL\n";
        $src = (yield get_xpath_async('https://github.com/mpyw'))
                 ->evaluate('string(//img[contains(@class,"avatar")]/@src)');
        echo "[Gravatar] Done! Now I download its data\n";
        yield curl_init_with($src, [CURLOPT_FILE => fopen('/tmp/mpyw.png', 'wb')]);
        echo "[Gravatar] Done! Saved as /tmp/mpyw.png\n";
    }

]));

use mpyw\Co\Co;
use mpyw\Co\CURLException;

static Co::wait(mixed $value, array $options = []) : mixed

static Co::async(mixed $value, mixed $throw = null) : null

static Co::isRunning() : bool

static Co::any(array $value) : \Generator<mixed>
static Co::race(array $value) : \Generator<mixed>
static Co::all(array $value) : \Generator<mixed>

Co::wait(function () {
    $group1 = Co::all([$ch1, $ch2, $ch3]);
    $group2 = Co::all([$ch4, $ch5, $ch6]);
    $group1or2 = Co::any([$group1, $group2]);
    var_dump(yield $group1or2);
});

static Co::setDefaultOptions(array $options) : null
static Co::getDefaultOptions() : array

$results = yield Co::SAFE => [$ch1, $ch2];

$results = yield [
    function () use ($ch1) {
        try {
            return yield $ch1;
        } catch (\RuntimeException $e) {
            return $e;
        }
    },
    function () use ($ch2) {
        try {
            return yield $ch2;
        } catch (\RuntimeException $e) {
            return $e;
        }
    },
];

$result = Co::wait([$ch1, $ch2], ['throw' => false]);

$results = Co::wait([
    function () use ($ch1) {
        try {
            return yield $ch1;
        } catch (\RuntimeException $e) {
            return $e;
        }
    },
    function () use ($ch2) {
        try {
            return yield $ch2;
        } catch (\RuntimeException $e) {
            return $e;
        }
    },
]);

Co::async($value, false);

Co::async($value, true);

yield Co::DELAY => $seconds
yield Co::SLEEP => $seconds  # Alias

yield $foo;
yield $bar;
return $baz;

yield $foo;
yield $bar;
yield Co::RETURN_WITH => $baz;

$a = yield $foo;
echo yield $bar;

$a = (yield $foo);
echo (yield $bar);

try {
    return '...';
} finally {
    // Reachable
}

try {
    yield Co::RETURN_WITH => '...';
} finally {
    // Unreachable
}