Online PHP editor | rfc for v6Xio

@ 2026-04-20T09:03:38Z

<?php

class Resolvable implements ArrayAccess, IteratorAggregate, Countable {
    protected $callable;
    protected $resolved = null;
    
    public function __construct( callable $closure ) {
        $this->callable = $closure;
    }
    
    public function __invoke( ...$args ) {
        if ( ! $this->resolved ) {
            $this->resolved = call_user_func_array( $this->callable, $args );
            
            // Any normalisation can be done here.
        }
        return $this->resolved;
    }
    
    public function offsetExists( mixed $k ) : bool {
        $this->__invoke();
        return isset( $this->resolved[ $k ] );
    }
    
    public function &offsetGet( mixed $k ) : mixed {
        $this->__invoke();
        return $this->resolved[ $k ];
    }
    
    public function offsetSet( mixed $k, mixed $v ) : void {
        $this->__invoke();
        $this->resolved[ $k ] = $v;
    }
    
    public function offsetUnset( mixed $k ) : void {
        $this->__invoke();
        unset( $this->resolved[ $k ] );
    }
    
    public function getIterator(): Traversable {
        $this->__invoke();
        return new ArrayIterator( $this->resolved );
    }
    
    public function count() : int {
        $this->__invoke();
        return count( $this->resolved );
    }
}

// 
$foo = function () { return 1; };
$endpoints = [
    '/wp/v2/users' => fn () => [
        [
            'method' => 'GET',
            'callback' => fn () => true,
            'args' => [
                'id' => [],
            ],
        ],
        [
            'method' => 'POST',
            'callback' => fn () => true,
            'args' => [
                'id' => [],
            ],
        ],
    ],
];

foreach ( $endpoints as $k => &$ep ) {
    if ( is_callable( $ep ) ) {
        $ep = new Resolvable( $ep );
    }
}


// Old-style plugin, eg Really Simple SSL:
	if ( isset( $endpoints['/wp/v2/users'] ) ) {
		// Save the original endpoint
		$original_endpoint = $endpoints['/wp/v2/users'];

		// Override the GET callback
		$endpoints['/wp/v2/users'][0]['callback'] = function() {
			return 'Sorry, you are not allowed to access users without authentication.';
		};

		// Preserve the original args and permission callback
		$endpoints['/wp/v2/users'][0]['args'] = $original_endpoint[0]['args'];
		$endpoints['/wp/v2/users'][0]['permission_callback'] = '__return_true';
	}

var_dump( $endpoints );
var_dump( $endpoints['/wp/v2/users'][0]['callback']() );

Output for git.master_jit: array(1) { ["/wp/v2/users"]=> &object(Resolvable)#3 (2) { ["callable":protected]=> object(Closure)#2 (3) { ["name"]=> string(22) "{closure:/in/v6Xio:54}" ["file"]=> string(9) "/in/v6Xio" ["line"]=> int(54) } ["resolved":protected]=> array(2) { [0]=> array(4) { ["method"]=> string(3) "GET" ["callback"]=> object(Closure)#4 (3) { ["name"]=> string(22) "{closure:/in/v6Xio:85}" ["file"]=> string(9) "/in/v6Xio" ["line"]=> int(85) } ["args"]=> array(1) { ["id"]=> array(0) { } } ["permission_callback"]=> string(13) "__return_true" } [1]=> array(3) { ["method"]=> string(4) "POST" ["callback"]=> object(Closure)#6 (3) { ["name"]=> string(35) "{closure:{closure:/in/v6Xio:54}:64}" ["file"]=> string(9) "/in/v6Xio" ["line"]=> int(64) } ["args"]=> array(1) { ["id"]=> array(0) { } } } } } } string(66) "Sorry, you are not allowed to access users without authentication."
Output for git.master: Process exited with code 139.

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