PHP: Dynamic Object Names [duplicate]

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Closed 9 years ago.

Possible Duplicate:
Get PHP class property by string

This is my original code:

function generateQuery($type, $language, $options)
{
    // Base type
    $query = $this->Queryparts->print['filter'];

    // Language modifiers
    // Additional options

    return $query;
}

The "print" is an array/hash defined as an object (with "(object)" casting). I wish to do something like this:

    $query = $this->Queryparts->$type['filter'];

To use the the $type variable as the object name. Is this possible?

Answer 1

$query = $this->Queryparts->{$type}['filter'];

Answer 2

You can either use an intermediary variable:

$name = 'something';
$object->$name;

Or you can use braces:

$a = array('foo' => 'bar');
$object->{$a['foo']}; //equivalent to $object->bar

(By the way, if you find yourself doing this often, there might be a design problem.)

Answer 3

Sure, you can, here is simple example:

$obj = new stdClass();
$obj->Test = new stdClass();
$obj->Test->testing['arr'] = 'test';

$type = 'testing';
print_r($obj);
print_r($obj->Test->{$type});

Answer 4

You can also use variable variable names by typing $$ :

$a = array('car', 'plane');
$varname = 'a';
var_dump($$varname);