[SOLVED] Variable scope

[iarp]

I'm having trouble with variables and accessing them within classes.

 

I have $L['base'] = '/home/'; at the start of my script and i need to access it within a class i've built a bit furthur down the page.

 

Parse error: parse error, expecting 'T_FUNCTION' in <LOCATION> on line 3

 

Line 3 pertains to

 

<?php

class systemsettings {

global $L;

...etc

 

 

etc...

}

?>

[iarp]

without global $L at the top. It says undefined variable on line 51 and line 51 is within the class using $L['base']

[Axeia]

You access class variables (outside the method) trough the use of $this->

 

Take this as an example

<?php
class MyClass
{
  private $name;

  function __construct( $pName )
  {
     $this->name = $pName;
  }
}
?>

notice how the dollar sign 'moves' to the front of $this->.

 

Think that should be of help?

[iarp]

This is the file

 

<?php
$L['base'] = '/lemon/';

class systemsettings {
    function base() {
         return $L['base'];
    }
}
?>

 

but "return $L['base'];" inside the class isn't able to access the originating $L at the very start of the script.

[Axeia]

The logical way to go about this would be by passing the variable as a parameter like this:

 

<?php
class systemsettings {
    function base( $pL ) {
         return  $pL['base'];
    }
}

$sysSettings = new systemsettings();
echo $sysSettings->base( $L );
?>

 

Or by passing it to the construct like this:

<?php
class systemsettings
{
  private $L;

  function __construct( $pL )
  {
     $this->L = $pL;
  }

  function base( $pL ) 
  {
     return  $this->L['base'];
  }
}

$sysSettings = new systemsettings( $L );
echo $sysSettings->base();
?>

 

Where the second example has the advantage that you could add another method doing something else with L['base'].. you gotta figure that one out for yourself which is the best to use for the given situation.

 

[edit]

A third (not recommended way) would be:

<?php
class systemsettings
{
  public $L;

  function __construct( $pL )
  {
     $this->L = $pL;
  }
}

$sysSettings = new systemsettings( $L );
echo $sysSettings->L;
?>

(class variable is public instead of private making it externally accessible)