Confused on how php objects handle arrays

Question

The output of this is "24", when I'd expect "44".

class some_class {
    public $array = array();

    public function construct() {
        $this->array[5] = 4;
    }

    public function something() {
        // $this->array at this point is empty, why?
        echo (isset($this->array[5])) ? $this->array[5] : 2;
        $this->array[5] = 4;
        // Here, $this->array holds the value 4 in the key 5 correctly
        echo (isset($this->array[5])) ? $this->array[5] : 2;
    }
}

$some_object = new some_class();
$some_object->something();

Any ideas why my expectations are being shattered?

public function construct() should be public function __construct(). — Mike Purcell
– Mike Purcell, Commented Dec 6, 2011 at 23:22

Jakub · Accepted Answer · 2011-12-06 23:23:04Z

9

Your constructor isn't firing it needs to be called:

public function __construct(){
 // constructor
}

otherwise the array fails to initialize.

answered Dec 6, 2011 at 23:23

Jakub

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Jon Newmuis · Accepted Answer · 2011-12-06 23:24:25Z

4

Your question basically boils down to your line at the beginning of something(), asking:

$this->array at this point is empty, why?

This is the case because PHP constructors need to be named __construct, whereas yours is simply named construct.

answered Dec 6, 2011 at 23:24

Jon Newmuis

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Iljaas · Accepted Answer · 2011-12-06 23:26:04Z

2

Your function construct() is never called. You should name it __construct().

answered Dec 6, 2011 at 23:26

Iljaas

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