CODEWITHSUNDEEP
phpoop
Shoe
Shoe

Reputation: 76240

Passing array of parameters to object constructor

How can I call a object constructor passing an array of parameters so that having:

$array = array($param1, $param2);

I'll be able to call

$abc = new Abc($param1, $param2);

considering that I don't know how many parameters could be set in the array. Is there something like call_object('Abc', array($param1, $param2))?

Upvotes: 11

Views: 18138

Answers (4)

augusthur
augusthur

Reputation: 211

How about using ... (splat operator)?

$array = array($param1, $param2);
$abc = new Abc(...$array); // equal to: new Abc($param1, $param2)

PHP 5.6 is required.

Upvotes: 21

lonesomeday
lonesomeday

Reputation: 237817

The ideal is to define your constructor to take an array.

If you can't do that, there is a possible workaround. If all parameters to the constructor are optional, you could do something like this with call_user_func_array:

$obj = new Abc;
call_user_func_array(array($obj, '__construct'), $array);

This results in your constructor being run twice: once with no parameters, and once with those in the array. You'll have to decide whether this is suitable for your application.

Upvotes: 4

Michael Berkowski
Michael Berkowski

Reputation: 270599

Assuming you are able to modify your objects' constructors, a pattern like this isn't uncommon, but requires associative arrays as input:

class Abc {
  public $prop1;
  public $prop2;

  public function __construct($params) {
    if (is_array($params)) {
       $this->prop1 = isset($params['prop1']) ? $params['prop1'] : NULL;
       $this->prop2 = isset($params['prop2']) ? $params['prop2'] : NULL;
    }
  }
}

// Created as:
$params = array('prop1'=>12354, 'prop2'=>54321);
$abc = new Abc($params);

Upvotes: 3

DarkDevine
DarkDevine

Reputation: 1047

The best way is to use an array or object that stores the arguments and you just pass that array/object

Another way would be using Reflection ( https://www.php.net/Reflection ) using newInstanceArgs ( https://www.php.net/manual/de/reflectionclass.newinstanceargs.php )

Upvotes: 7

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