给无参数定义函数传参

callNoParamaterFunction.php

<?php

    function greet() : Closure {
        return function($name) {
            return 'Hello ' . $name;
        };
    }

    function call(Closure $func) {
        return function($name) use ($func) {
            return $func($name);
        };
    }

    $greet_func = call(greet());

    $msg = $greet_func('Liam');

    echo $msg; // Hello Liam