loop through all public variables and translate NULL values to empty strings

Question

How to loop through all public variables in a class from inside the class?

How to get the public variables?

private function translate_null_values_to_strings(){
    foreach($this->public_vars as $key => $value){
        if(is_null($this->$key)) $this->$key = '';
    }
}

ReflectionClass::getProperties(ReflectionProperty::IS_PUBLIC) — Niet the Dark Absol
– Niet the Dark Absol, Commented Mar 29, 2016 at 8:21
I would avoid doing this.. there's something wrong in your app if the object have some properties set with values you don't want later.. — Mihai Matei
– Mihai Matei, Commented Mar 29, 2016 at 8:25

Chetan Ameta · Accepted Answer · 2016-03-29 08:21:26Z

3

Use Reflection. I've modified an example from the PHP manual to get what you want:

class Test
{
    public $public1 = 'public 1';
    public $public2 = '';
    public $public3 = 'public 3';
    private $private1 = 'private 1';

    public function __construct()
    {
        $reflect = new ReflectionObject($this);
        foreach ($reflect->getProperties(ReflectionProperty::IS_PUBLIC) as $prop)
        {
            $propName = $prop->getName();
            echo $propName." --> ". $this->$propName . "\n";
        }
    }
}

$ob = new Test();

Output:

public1 --> public 1
public2 --> 
public3 --> public 3

answered Mar 29, 2016 at 8:21

Chetan Ameta

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