No Property In Interface¶

<?php

function naturalIntegers() {
    $i = 0;
    while (true) {
        yield $i++;
    }
}

foreach(naturalIntegers() as $i) {
    if ($i > 10) {
        break;
    }
    print $i.PHP_EOL;
}

print "finished
";

PHP is better than me : I thought I found a way to create properties in an interface, by declaring promoted properties in a constructor.

Someone coding the PHP engine was smarter than me : it feels so good! (BTW, who would that be?)

It’s also going to save me some sanity, as I don’t have to upgrade my Static Analysis Engine.

Note that PHP 8.4 introduced properties in interfaces, as long as they have property hooks.

See Also¶

Interfaces (PHP manual)
this function never returns [Try me]

PHP Features¶

Last updated: 14 July 2026