Syntax
$even = array_filter([1, 2, 3, 4], fn (int $n): bool => $n % 2 === 0);Examples
PHP array_filter example
A focused example you can adapt while practising.
$even = array_filter([1, 2, 3, 4], fn (int $n): bool => $n % 2 === 0);Best practices
- Start with the smallest working example, then adapt it to your project.
- Use the language’s standard library and idioms before introducing extra dependencies.
Runtime & versions
PHP runtime on a server or CLI. Feature availability depends on the language and runtime version used by your project; consult the official reference below.
PHP Manual