PHP does not report an error when using unexpected & inside reference generator function

[ohyeaah]

Description

The following code:

<?php
error_reporting(E_ALL);

function &moh()
{
  $test = 5;
  yield &$test;
}

foreach (moh() as &$value)
  var_dump($value);

Resulted in this output:

NULL

But I expected this output instead:

PHP Parse error:  syntax error, unexpected token "&" in /home/user1/test.php on line 7

PHP Version

PHP 8.2.24

Operating System

Debian GNU/Linux 12 (bookworm)

[cmb69]

Indeed, this is strange, especially because https://3v4l.org/FeeDS.

[bwoebi]

This is the operation (yield) & ($value), i.e. a bitwise and of the $value variable and the return value of yield.