I have grouped a few functions together in a class. Some of the functions will be using the same list to do some computational work. Is there a way to put the list so that all the functions can still access the list instead of putting the list inside each functions that needs the list?
// Simplified version of what I am trying to do
Class TestGroup
{
public $classArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
public function getFirstFiveElemFromArray()
{
$firstFive = array_slice($this -> $classArray, 0, 5, true);
return $firstFive;
}
public function sumFirstEightElemFromArray()
{
//methods to get first eight elements and sum them up
}
}
$test = new TestGroup;
echo $test -> getFirstFiveElemFromArray();
This is the error message I am getting:
Undefined variable: classArray in C:\wamp\www\..
remove the $
line 8. Your accessing a variable inside the class. Inside the class you call methods and variables like so: $this->myMethod()
and $this->myVar
. Outside the Class call the method and var like so $test->myMethod()
and $test->myVar
.
Note that both methods and variables can be defined as Private or Public. Depending on that you will be able to access them outside the Class.
// Simplified version of what I am trying to do
Class TestGroup
{
public $classArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
public function getFirstFiveElemFromArray()
{
$firstFive = array_slice($this -> classArray, 0, 5, true);
return $firstFive;
}
public function sumFirstEightElemFromArray()
{
//methods to get first eight elements and sum them up
}
}
$test = new TestGroup;
echo $test -> getFirstFiveElemFromArray();
You are trying to access an object member , so you should use $this->classArray
. If you have the dollar sign there, $classArray
(which isn't defined) would be evaluated.
Eg if you put $classArray = 'test'
before the line that starts with $firstFive =
, PHP will try to access the test member and say that it doesn't exist.
So: Remove the dollar sign. :-)
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