How to delete object from arrayObject in php?

Question

I want delete object from arrayObject in php, but in deleteComputer method show this error: "Warning: Illegal offset type", help me pls, Im starting with php :)

i've:

       class ControllerList {

            private $computers;

            function __construct() {
                $this->computers= new ArrayObject();

            }

         public function addComputer($computer) {
             $this->computers->append($computer);
         }

         public function deleteComputer($computerNumber) {
             foreach ($this->computers as $value) {
                 if($value->getNumber() == computerNumber){
                    unset($this->computers[$value]);
                    echo 'Delete!!';
                 } else {
                    echo 'Don't delete!!';
                 }
               }
         }

        }

Main file:/

         $list = new ControllerList();

         $computer1 = new Computer();
         $computer1->setNumber(001);
         $computer1->setColor("Black");

         $computer2 = new Computer();
         $computer2->setNumber(002);
         $computer2->setColor("White");

         $list->addComputer($computer1);
         $list->addComputer($computer2);

         $list->deleteComputer(001);  --> error method

computerNumber should be $computerNumber

Barmar
– Barmar

2017-03-29 23:49:09 +00:00
Commented Mar 29, 2017 at 23:49 — Barmar
– Barmar, Commented Mar 29, 2017 at 23:49

Barmar · Accepted Answer · 2017-03-29 23:50:59Z

2

$value is an object, not an array index. You need to add the array index to the foreach loop:

foreach ($this->computers as $i => $value) {
    if($value->getNumber() == $computerNumber){
        unset($this->computers[$i]);
        echo 'Delete!!';
    } else {
        echo 'Don't delete!!';
    }
}

answered Mar 29, 2017 at 23:50

Barmar

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Comments

Community · Accepted Answer · 2017-05-23 10:30:57Z

0

As with Barmar's solution, I would address your escaping issue here.

 echo 'Don't delete!!';

to

echo "Don't delete!!";

or

echo 'Don\'t delete!!';

Additional information on escaping strings can be found here: Escaping quotation marks in PHP

edited May 23, 2017 at 10:30

CommunityBot

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answered Mar 29, 2017 at 23:55

Tony

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