Online PHP editor | output for OGqFu

@ 2016-07-04T14:25:07Z

<?php

namespace Bar
{
    interface PipeInterface
    {
        public function __construct($callbacks);
        public function pipe(callable $fn);
        public function process($payload);
    }

    function map(callable $fn)
    {
        return new class($fn)
        {
            private $fn;

            public function __construct(callable $fn)
            {
                $this->fn = $fn;
            }

            public function __invoke($payload)
            {
                return array_map($this->fn, $payload);
            }
        };
    }

    function pipe($callbacks)
    {
        return new class($callbacks) implements PipeInterface
        {
            private $callbacks;

            public function __construct($callbacks)
            {
                if (is_array($this->callbacks)) {
                    return $this->callbacks = $callbacks;
                }

                $this->callbacks = [$callbacks];
            }

            public function pipe(callable $callback)
            {
                return new self(array_merge($this->callbacks, [$callback]));
            }

            public function process($payload)
            {
                return array_reduce($this->callbacks, function ($payload, $callback) {
                    return call_user_func($callback, $payload);
                }, $payload);
            }

            public function __invoke($payload)
            {
                return $this->process($payload);
            }
        };
    }
}

namespace Foo
{
    use function Bar\pipe;
    use function Bar\map;

    $xs = [
        [
            'name' => 'Sérgio'
        ],
        [
            'name' => 'Marcelo'
        ]
    ];

    $pipe = pipe(map(function ($x) {
        return $x['name'];
    }));

    // var_dump($pipe($xs)); // works

    $upper = pipe('strtoupper');
    // echo $upper('hello'); // works
    $rev = $upper->pipe('strrev'); // doesn't work
    echo $rev('hello'); // doesn't work
    echo pipe(['strtoupper', 'strrev'])('hello'); // doesn't work
}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, class "strtoupper" not found in /in/OGqFu:53 Stack trace: #0 /in/OGqFu(53): call_user_func(Array, 'hello') #1 [internal function]: Bar\PipeInterface@anonymous->Bar\{closure}('hello', Array) #2 /in/OGqFu(52): array_reduce(Array, Object(Closure), 'hello') #3 /in/OGqFu(59): Bar\PipeInterface@anonymous->process('hello') #4 /in/OGqFu(88): Bar\PipeInterface@anonymous->__invoke('hello') #5 {main} thrown in /in/OGqFu on line 53
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, class "strtoupper" not found in /in/OGqFu:53 Stack trace: #0 /in/OGqFu(53): call_user_func(Array, 'hello') #1 [internal function]: Bar\PipeInterface@anonymous->Bar\{closure}('hello', Array) #2 /in/OGqFu(52): array_reduce(Array, Object(Closure), 'hello') #3 /in/OGqFu(59): Bar\PipeInterface@anonymous->process('hello') #4 /in/OGqFu(88): Bar\PipeInterface@anonymous->__invoke('hello') #5 {main} thrown in /in/OGqFu on line 53
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33: Warning: call_user_func() expects parameter 1 to be a valid callback, class 'strtoupper' not found in /in/OGqFu on line 53 Warning: call_user_func() expects parameter 1 to be a valid callback, class 'strtoupper' not found in /in/OGqFu on line 53
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28: Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/OGqFu on line 14
Process exited with code 255.

preferences:dark modelive preview