Php, isset - default value, can it be simplified? - php

Question

here is something:
$result = $this->getSomething();
$db = new Db();
$db->save($result['DATA']); // might exists or not
$db->save($result['IP']); // might exists or not
$db->save($result['X']); // might exists or not
but those array keys are not sure to be exists. Of corse I can always write this:
$result = $this->getSomething();
if (!isset($result['DATA']))
{
$result['DATA'] = null;
}
//same for the other keys
$db = new Db();
$db->save($result['DATA']);
$db->save($result['IP']);
$db->save($result['X']);
but its very cumbersome job. Is there any way to simplify this?

Answer 1

Starting at PHP 7 (which every should start using anyway), you can use the new coalesce operator to do this:
$db->save($result['DATA'] ?? null);

Answer 2

$result = $this->getSomething();
$result += array_fill_keys(['DATA', 'IP', 'X'], null);
This populates any of these keys which don't exist with null.
Can even be written as $result = $this->getSomething() + array_fill_keys(..);.
+ array union operator
array_fill_keys

Answer 3

You can do this:
$data = !isset($result['DATA']) ? null : $result['Data'];
$ip = !isset($result['IP']) ? null : $result['IP'];
etc...

Answer 4

It would be better if you would be use OOP way
your method getSomething() must return instance of some class (ex. SomeData) instead of array
/**
* #return SomeData
*/
public function getSomething()
{
/*
* some code
*/
return new SomeData($data, $x, $ip);
}
SomeData class
class SomeData
{
private $data;
private $ip;
private $x;
public function __construct($data, $ip, $x)
{
$this->data = $data;
$this->ip = $ip;
$this->x = $x;
}
/**
* #return mixed
*/
public function getData()
{
return $this->data;
}
/**
* #param mixed $data
*/
public function setData($data)
{
$this->data = $data;
}
/**
* #return mixed
*/
public function getIp()
{
return $this->ip;
}
/**
* #param mixed $ip
*/
public function setIp($ip)
{
$this->ip = $ip;
}
/**
* #return mixed
*/
public function getX()
{
return $this->x;
}
/**
* #param mixed $x
*/
public function setX($x)
{
$this->x = $x;
}
}
And finaly you work with result without worrying about isset and etc.
$result = $this->getSomething();
$db = new Db();
$db->save($result->getData());
$db->save($result->getIp());
$db->save($result->getX());