php:
a. 代码:

<?phpfunction test(func){func();}test(function(){echo "string";});

b. 输出:

Parse error: syntax error, unexpected ')', expecting variable (T_VARIABLE) in E:\test\web\test.php on line 2javascript:
a. 代码:

function test(func){func()}test(function(){console.log(1)})

b. 输出:

1