PHP code example of carno-php / promise

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

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

    

carno-php / promise example snippets

$promise = new Promise(static function (Promised $promise) {
    if (1) {
        $promise->resolve('success');
    } else {
        $promise->reject('error');
    }
});
$promise->then(function () {
    echo 'promise has been resolved', PHP_EOL;
}, function () {
    echo 'promise has been rejected', PHP_EOL;
});

$promise = Promise::deferred();
$promise->then(function (string $var) {
    echo $var, PHP_EOL;
});
$promise->resolve('var');

$promise = Promise::resolved('var');
$promise->then(function (string $var) {
    echo $var, PHP_EOL;
});

$promise = Promise::rejected(new Exception('Test'));
$promise->catch(function (Throwable $e) {
    echo 'failure with ', $e->getMessage(), PHP_EOL;
});

$p1 = Promise::deferred();
$p2 = Promise::deferred();
$pa = Promise::all($p1, $p2);
$pa->then(function (array $results) {
    echo 'all resovled with results ', var_export($results, true), PHP_EOL;
});
$p1->resolve('var1');
$p2->resolve('var2');

$p1 = Promise::deferred();
$p1->then(function () {
    echo 'p1 has been resolved', PHP_EOL;
}, function () {
    echo 'p1 has been rejected', PHP_EOL;
});
$p2 = Promise::deferred();
$p2->then(function () {
    echo 'p2 has been resolved', PHP_EOL;
}, function () {
    echo 'p2 has been rejected', PHP_EOL;
});
$pr = Promise::race($p1, $p2);
$pr->then(function (string $var) {
    echo 'race result is ', $var, PHP_EOL;
});
$p1->resolve('test');
// or $p2->reject();

$promise = Promise::deferred();
echo '#1 promise is pended ? ', $promise->pended() ? 'yes' : 'no', PHP_EOL;
$promise->resolve();
echo '#2 promise is pended ? ', $promise->pended() ? 'yes' : 'no', PHP_EOL;

$promise = Promise::deferred();
echo '#1 promise is chained ? ', $promise->chained() ? 'yes' : 'no', PHP_EOL;
$promise->then(function () {
});
echo '#2 promise is chained ? ', $promise->chained() ? 'yes' : 'no', PHP_EOL;

$next = Promise::deferred();
$next->then(function (string $var) {
    echo 'NEXT promise been resolved with ', $var, PHP_EOL;
}, function (string $var) {
    echo 'NEXT promise been rejected with ', $var, PHP_EOL;
});
$promise = Promise::deferred()->sync($next);
$promise->then(function (string $var) {
    echo 'CURRENT promise been resolved with ', $var, PHP_EOL;
}, function (string $var) {
    echo 'CURRENT promise been rejected with ', $var, PHP_EOL;
});
$promise->resolve('hello');
// or $promise->reject('world');

Promise::deferred()->fusion()->throw(new Exception('test'));

$promise = Promise::deferred();
$promise->then(function (...$args) {
    echo 'promise resolved with args ', var_export($args, true), PHP_EOL;
}, function (...$args) {
    echo 'promise rejected with args ', var_export($args, true), PHP_EOL;
});
$promise->resolve('hello', 'world');
// or $promise->reject('hello', 'world');

Promise::deferred()->resolve('var1', 'var2');

Promise::deferred()->reject('var1', 'var2');

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