PHP Call to undefined function

Question

I am trying to call a function from another function. I get an error:

Fatal error: Call to undefined function getInitialInformation()  in controller.php on line 24 

controller.php file:

require_once("model/model.php");   function intake() {     $info = getInitialInformation($id); //line 24 } 

model/model.php

function getInitialInformation($id) {     return $GLOBALS['em']->find('InitialInformation', $id); } 

Things already tried:

1. Verified that the require_once works, and the file exists in the specified location.
2. Verified that the function exists in the file.

I am not able to figure this out. Am I missing something here?

Answer 1

How to reproduce the error, and how to fix it:

1. Put this code in a file called p.php:

   <?php class yoyo{     function salt(){     }     function pepper(){         salt();     } } $y = new yoyo(); $y->pepper(); ?> 

2. Run it like this:

   php p.php 

3. We get error:

   PHP Fatal error:  Call to undefined function salt() in  /home/el/foo/p.php on line 6 

4. Solution: use $this->salt(); instead of salt();

   So do it like this instead:

   <?php class yoyo{     function salt(){     }     function pepper(){         $this->salt();     } } $y = new yoyo(); $y->pepper();  ?> 

If someone could post a link to why $this has to be used before PHP functions within classes, yeah, that would be great.