I wonder why they added the "fn()" thing on the left of the array functions.

    Javascript: $square = $x => $x*$x;
    PHP       : $square = fn($x) => $x*$x;

Probably so that it works inside arrays:

    $a=[fn($x)=>$x*2,fn($x)=>$x*$x];
    echo $a[1](5); // 25

Well, it also makes it a tad more readable, so I am ok with it.

Since we are talking about new features of PHP: Does anybody else wish there were named parameters?

I think PHP is pretty complete. It is my favorite language and I don't really wish for anything added to it. Except for two things:

1: The named parameters of Python:

    def paint(what,color='blue',tool='pen',layers=1)
        ...
    
    paint('house',tool='brush')

2: The short object Syntax of Javascript:

    city={name: 'Berlin', population: 3748000}