3v4l.org

run code in 300+ PHP versions simultaneously

@ 2016-03-15T09:44:52Z

<?php

abstract class Visitor
{
    public final function __call(string $method, array $args)
    {
        if ($method === 'visit') {
            $class = substr(strrchr(static::class, '\\'), 1);
            $method .= $class;
            die(static::class);
            if (method_exists($this, $method)) {
                return call_user_func_array([$this, $method], $args);
            }
        }
        
        throw new Exception('Unknown method ' . $method);
    }
}

interface Visitable
{
    public function accept(Visitor $v);
}

class FooVisitor extends Visitor
{
    public function visitFoo(Foo $foo)
    {
        print 'visit Foo' . PHP_EOL;
    }
}

class Foo implements Visitable
{
    public function accept(Visitor $v)
    {
        $v->visit($this);
    }
}

$fv = new FooVisitor();
$f = new Foo();
$f->accept($fv);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 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: FooVisitor
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 FooVisitor
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28: Catchable fatal error: Argument 1 passed to Visitor::__call() must be an instance of string, string given in /in/n2iJ0 on line 5
Process exited with code 255.

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