Online PHP editor | rfc for CrEev

@ 2019-07-19T15:57:49Z

<?php

// An example callback function
function my_callback_function() {
    echo 'hello world!', PHP_EOL;
}

// Callback methods in classes
class ParentClass {
    static function myCallbackMethod() {
        echo 'Hello Parent!', PHP_EOL;
    }
}

class MyClass extends ParentClass {
    static function myCallbackMethod() {
        echo 'Hello Child!', PHP_EOL;
    }
}

class Invokable {
    public function __invoke() {
        echo 'Hello Invokable', PHP_EOL;
    }
}

$obj       = new MyClass();
$invokable = new Invokable();

$callbacks = array(
    'type1' => 'my_callback_function',
    'type2' => array('MyClass', 'myCallbackMethod'),
    'type3' => array($obj, 'myCallbackMethod'),
    'type6' => $invokable,
    'type7' => function() { echo 'Hello Closure', PHP_EOL; },
    'type4' => 'MyClass::myCallbackMethod',
    'type5' => array('MyClass', 'parent::myCallbackMethod'),
);

foreach( $callbacks as $key => $callback ) {
    echo PHP_EOL, 'Testing ', $key, PHP_EOL;
    var_dump(is_callable());
    call_user_func($callback);
    try {
        $callback();
    } catch( Error $e ) {
        echo $e->getMessage(), PHP_EOL;
    }
}

Output for git.master, git.master_jit, rfc.property-hooks: Testing type1 Fatal error: Uncaught ArgumentCountError: is_callable() expects at least 1 argument, 0 given in /in/CrEev:42 Stack trace: #0 /in/CrEev(42): is_callable() #1 {main} thrown in /in/CrEev on line 42
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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