Failed Using array_merge inside of PHP class

Question

class Test
{
  public $data = array();

  public function addData($data = array())
  {
    array_merge($data, $this->data);
    return $this;
  }

  public function showData()
  {
    print_r($this->data);
  }
}
$test = new Test;
$test->addData(array("halo", "zaki"))->showData();

i tried to merging 2 array, but it doesn't work, maybe someone can explain to me?

Tom Wright · Accepted Answer · 2016-02-08 12:50:37Z

2

array_merge does not modify the arrays passed to it, but rather returns the result.

Try this:

public function addData($data = array())
{
    $this->data = array_merge($data, $this->data);
    return $this;
}

answered Feb 8, 2016 at 12:50

Tom Wright

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Comments

Rajdeep Paul · Accepted Answer · 2016-02-08 12:50:28Z

0

You forgot to assign the resulting array to member variable $data. It should be,

$this->data = array_merge($data, $this->data);

answered Feb 8, 2016 at 12:50

Rajdeep Paul

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