variable in config.php not recognized in function other file

[sleith]

i wanna ask >.<

i have config variables stored in config.php

i used to include this file in everywhere and that works fine

but i have another file that contains functions used for my site.

i don't know why in these functions, the variable in config.php is not recognized (i have included the config.php)

 

 

example:

 

in config.php

<?php
$MY_NAME="SLEITH";
?>

 

 

in function.php

<?php
  require_once("config2.php");
  function printName(){
  echo  $MY_NAME;
}
?>

 

in index.php

<?php
require_once("config.php");
require_once("function.php");

echo printName();
?>

 

this expected to print 'SLEITH', but it didn't

 

need help >.< thx

[trq]

Variables defined outside of a function are not available within said function. thats half the point of a function, to encapsulate code. Variables created within the function are not available outside and vice versa.

[LemonInflux]

function printName(){
global $MY_NAME;  
echo  $MY_NAME;
}

 

That'll do it.

 

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[PFMaBiSmAd]

Please don't suggest using the global keyword to bring a variable into a function. It is bad programming practice. Any main program variable that is needed inside of a function should be passed as a function parameter in the function call.

[sleith]

thanks for the replies

should i passed it into parameter or declared my config in a class config, which better?

[LemonInflux]

Please don't suggest using the global keyword to bring a variable into a function. It is bad programming practice. Any main program variable that is needed inside of a function should be passed as a function parameter in the function call.

 

Really? Oops :S Looks like I've got quite a bit of code rewriting to do then

 

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[PFMaBiSmAd]

thanks for the replies

should i passed it into parameter or declared my config in a class config, which better?

From a general purpose application standpoint, where a configuration file would contain all the configuration settings used by the application (they should actually be defined constants since you don't expect them to change, accidentally or deliberately, during the course of a script's execution) a function that needs to access a configuration setting as part of its' code should actually be a class (encapsulating related functions and data into a single object.) The configuration setting(s) used by any particular class would be passed as parameter(s) when the instance of the class is created/initialized.

 

For a general purpose function (having nothing to do with configuration settings), any value would be passed as a parameter in the function call.

[sleith]

ok thanks a lot for the advice