--TEST-- Closure 001: Lambda without lexical variables --FILE-- <?php $lambda1 = function () { echo "Hello World!\n"; }; $lambda2 = function ($x) { echo "Hello $x!\n"; }; var_dump(is_callable($lambda1)); var_dump(is_callable($lambda2)); $lambda1(); $lambda2("Universe"); call_user_func($lambda1); call_user_func($lambda2, "Universe"); echo "Done\n"; ?> --EXPECT-- bool(true) bool(true) Hello World! Hello Universe! Hello World! Hello Universe! Done