The La(te)st PHP 7 — What's new in PHP 7.4

Syntax:



$arrow = fn($x) => $x + $y;

• Variables automatically captured by-value

• Shorter prefix: fn

• Implicit return is one expression

Great for filter:



$this->existingSchemaPaths = array_filter($paths, function ($v) use ($names) {
    return in_array($v, $names);
});

Becomes:



$this->existingSchemaPaths = array_filter($paths, fn($v) => in_array($v, $names));