Calling Functions from Other Functions

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zenthoef

I'm sure its possible to call functions from other functions, but it is not working for me. Is there some syntax someone can provide to me as an example of calling a function within another function?

Also, both of these functions are in the same class. I have not declared any functions in this class as public or private. Do functions in a class default to private? Or do functions default to public? If they are public by default, are functions in the same class in each other's scope?

Thanks!

hastx

Here is a prior discussion with a little relevance:
http://www.webdeveloper.com/forum/showthread.php?t=221402&highlight=calling+function

I think public is default..., but i also think that public and private visibility declaration on functions is only available as of php 5, and a lot of people still use php 4...so you may not need to declare depending on your target and enough planning.

There is a good resource on visibility here:
http://www.webdeveloper.com/forum/showthread.php?t=221402&highlight=calling+function

tirna

yes, private and public delarations of class variables and functions is available in php5

Imo it's good practice to declare a variable or function private/public regardless of the default....but that's just me

To call a function with a class file in php5 use:

$this->functionName(arg1,arg2,argN);

zenthoef

Thanks for the replies. I don't think I was clear in what I was asking. Basically, is this possible:

class someClass{

function_one($arg1)
{
  $output_one = $arg1+15;
  return $output_one;
}

function_two()
{
  $send = 3;
  $output_two = function_one($send);
  return $output_two;
}
}

My question is if i call funtion_two will it return a value of 18? If this is possible is my syntax right? I'm basically doing this, but more complicated and its not working.

Thanks.

NogDog

A function defined in a class does not "exist" only by its function name, you must reference it via the "->" operator as a member of an object, or statically via the "::" operator as a class member. Therefore in your example you would want to use the special "$this" variable to indicate that the function is a method of the current object:

$output_two = $this->function_one($send);

tirna

NogDog;1075207 wrote:
A function defined in a class does not "exist" only by its function name, you must reference it via the "->" operator as a member of an object, or statically via the "::" operator as a class member. Therefore in your example you would want to use the special "$this" variable to indicate that the function is a method of the current object:
$output_two = $this->function_one($send);

Correct me if I'm wrong, but isn't the above what was said earlier

 

yes, private and public delarations of class variables and functions is available in php5

Imo it's good practice to declare a variable or function private/public regardless of the default....but that's just me :)

To call a function with a class file in php5 use:


Code:
$this->functionName(arg1,arg2,argN);

NogDog

tirna;1075233 wrote:
Correct me if I'm wrong, but isn't the above what was said earlier

Yes, it was said, but apparently not understood, so I tried again in the hopes that this time it might be.

zenthoef

:o I did misunderstand that post! However, the "$this->" solved my problems. Thanks so much for all who answered!