php: Select object property with a dynamic name ($obj->dynamicNameHere)?

Posted on 2012-03-29
Last Modified: 2012-03-31
I should know this, but here I am. I'm trying to select an object property with a non-static name like this:

$properties = array('property1','property2','property3');
foreach($properties as $property) {
  print $theObject->[[[$property]]]

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Any thoughts on how to do that? I know it's probably super simple.


Question by:Ultrus
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LVL 10

Expert Comment

ID: 37784633
Hello Chris,

since properties are called without a dollar sign behind the arrow, you can simply use a dollar for a dynamic name. Here an example working for me:
// Defining test class
class test{
    public $variable;
// Creating an instance of it
$testobj = new test();
// preset a value
$testobj->variable = 'Wert 1';
// name the variable, can be a loop or something
$varname = 'variable';
// assigning a new value to the named variable above
$testobj->$varname = 'Wert 2';
// let's see if it works
echo $testobj->variable;

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LVL 10

Author Comment

ID: 37785033
I figured it out. If you respond with "Yes, that looks great!", I'll give your response all the points. ;)

$properties = array('property1','property2','property3');
foreach($properties as $property) {
  print $theObject->{$property}

Open in new window

LVL 10

Accepted Solution

acbxyz earned 500 total points
ID: 37789279
Yes, that looks great! ;-)

If $property is a simple string variable as in this example, you even don't need the curly braces, but you can.
LVL 10

Author Closing Comment

ID: 37792189
Thanks! :D

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