Say I have this:
class myObject {
private $value = 45;
// .... other variables
}
$obj = new myObject();
echo $obj;
How can I control what is echoed? I know I can make the variable public (and write echo $obj->value), or create a function and call that, but is there a default php function that gets called when displaying an object? And can I override it?
I want to just be able to use the object name to display a particular value instead of calling a function or a variable within that object?
I hope I've explained myself correctly! Thanks!
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But is there a default function that php calls when displaying any object that I can override?
class myObject {
private $value = 45;
// .... other variables
// Override default function that gets called by php when outputting
public function __display()
return $this->value;
}
}
$obj = new myObject();
echo $obj; // Will call __display();
Just to finish this off, I managed to overcome this problem with magic methods (__call, __set, __get, __toString), which are extremely useful in creating awesome code!! Also I mentioned above that the __toString doesn't always get called but it actually makes sense in that it gets called when PHP tries to convert it to a string.. i.e:
echo $obj; // won't work
echo (string) $obj; // will work
echo 'Object is: ' . $obj; // will work
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by: hieloPosted on 2008-02-19 at 07:02:56ID: 20928918
>>How can I control what is echoed?
You need public properties or public methods that return the values of the private properties:
class myObject {
private $value = 45;
// .... other variables
function getData()
return $this->value;
}
}
$obj = new myObject();
echo $obj->getData();