Provide recursion system for anonymous closures.
PHP 7.x
mpyw@localhost:~$ git clone [email protected]:mpyw/phpext-callee.git
mpyw@localhost:~$ cd phpext-callee
mpyw@localhost:~/phpext-callee $ /path/to/phpize
mpyw@localhost:~/phpext-callee $ ./configure --enable-callee --with-php-config=/path/to/php-config --prefix=/path/to/php-src
mpyw@localhost:~/phpext-callee $ make
mpyw@localhost:~/phpext-callee $ make install
mpyw@localhost:~/phpext-callee $ vim /path/to/php.inimpyw@localhost:~$ phpbrew ext install [email protected]:mpyw/phpext-callee.git<?php
var_dump((function ($n) {
return $n < 2 ? 1 : $n * callee()($n - 1);
})(5));
// 5! = 5 * 4 * 3 * 2 * 1 = int(120)