call function in a function

[abnfire]

can i call function in a function?
example :

function_name( another_function(), arg2);

[shawon22]

sure y not

[eoghain]

Yes. The way you are showing this is calling a function as a parameter to another function and this is valid also just as long as the function you are calling returns a valid value for that parameter. Since PHP isn't a typed language this will never cause an error, but you may get unexpected results.

<?php
   function number() {
      return 5;
   }

   function character() {
      return 'a';
   }

   function increment(num) {
     ret_val = num++;
     return ret_val;
   }

   echo increment(1) . "<br>\n";
   echo increment(number()) . "<br>\n";
   echo increment(character()) . "<br>\n";
?>

The above code should run without any problems, but you may or may not get the results that you are expecting.

[mahers]

Cenrtainly, providing the function you are calling returns some kind of parameter for the main function.