$x == $y should guarantee that $a[$x] == $a[$y]. In PHP, it doesn't. That's not different, that's just broken, and the language design makes dozens of elementar

$x == $y should guarantee that $a[$x] == $a[$y]. In PHP, it doesn't. That's not different, that's just broken, and the language design makes dozens of elementary mistakes like that where getting it right wouldn't have sacrificed the only strength (streamlined deployable server integration) in any way.