UchMan

Every major languages had this long time ago. Why is this still the subject for discussion, I don't understand. I don't think it affects performance of the language.

Imagine, having chainable functions like Laravel collections inside php

$result = collect("Hello World")
    ->map(fn($x) => htmlentities($x))
    ->map(fn($x) => str_split($x))
    ->map(fn($x) =>  array_map('strtoupper', $x))
    ->map(fn($x) =>  array_filter($x, fn($v) => $v != 'O'));
		
$result = "Hello World"
    |> 'htmlentities'
    |> 'str_split'
    |> fn($x) => array_map('strtoupper', $x)
    |> fn($x) => array_filter($x, fn($v) => $v != 'O');
		

That would be so useful. Not to mention about pipeline pattern, which can be implemented with this, so easy. I do like First-class callable syntax.