Is static array property not possible in php?

Question

Below is my code in php,and I am getting error:

Parse error: syntax error, unexpected '[' in /LR_StaticSettings.php on line 4

<?php
class StaticSettings{
    function setkey ($key, $value) {
        self::arrErr[$key] = $value; // error in this line
    }
}
?>

I want to use statically not $this->arrErr[$key] so that I can get and set static properties without creating instance/object.

Why is this error? Can't we create static array?

If there is another way, please tell me. Thanks

Answer 1

You'd need to declare the variable as a static member variable, and prefix its name with a dollar sign when you reference it:

class StaticSettings{
    private static $arrErr = array();
    function setkey($key,$value){
        self::$arrErr[$key] = $value;
    }
}

You'd instantiate it like this:

$o = new StaticSettings;
$o->setKey( "foo", "bar");
print_r( StaticSettings::$arrErr); // Changed private to public to get this to work

You can see it working in this demo.