Syntax
$double = function (int $value): int {
return $value * 2;
};Examples
PHP closures example
A focused example you can adapt while practising.
$double = function (int $value): int {
return $value * 2;
};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