Extracting 'property' values

[griffinmt]

Perhaps I can't see the forest for all those trees out there :queasy:

Given the following snippet:

$x = new Sampleclass;
$b = "SampleProperty";
.
.
echo $x->SampleProperty;

works as advertised

But how do you get the poperty value if you only have the variable containing the property name: ie the 'logical' equivilent to doing this:

echo $x[$b]; // which of course does not work with class objects

In other words how can you trundle thru an object programatically with no knowledge of the property name in advance, and not only pull the names out but also their current values?

I tried the get_class_vars functions coupled with a foreach loop, but that only returns newly initialized class values from the constructor etc :mad:

Thanks,
Martyn

[drew010]

i think this is what you are going for, if so it is possible...

<?php

class myClass {
  function myFunction()
  {
    echo 'Inside myFunction()';
  }
}

$obj = new myClass();
$function = 'myFunction';

$obj->$function();   //this will call $obj->myFunction() and print out Inside myFunction()

?>

[griffinmt]

<?php
class myClass {
function myFunction()
{
echo 'Inside myFunction()';
}
}

$obj = new myClass();
$function = 'myFunction';
$obj->$function(); //this will call $obj->myFunction() and print out Inside myFunction()
?>

In the above, are you saying that $obj->$function will give exactly the same results as $obj->myFuntion

If so, that is exactly what I need to do! Thanks!!!!

[drew010]

yeah, it will, just make sure you add the () to the end of the variable so it tries to call the function and not access a class variable

[griffinmt]

In actual fact, I wasn't trying to access a method but wanted to access any properties of a class without knowing their names at coding time.

I just tried it and it worked as you described!!

I now vaguely remember reading a warning about using the $ after the -> construct that it would give you results that randomly reflected the content of the variable instead of a property name without the $ symbol. Guess those trees where just a blowing in my breeze!!!

Again, thanks for the prompt answer.

[drew010]

no problem. glad it was what you were looking for and works as desired 🙂