My class looks similar to this:
class Foo {
const UNKNOWN = 2;
public function doStuff($var) {
if($var==UNKNOWN) {
echo "Unknown state";
return;
}
// other stuff
}
}
However, I'm getting this error in doStuff():
Use of undefined constant UNKNOWN - assumed 'UNKNOWN'
What am I doing wrong? Can't I define custom constants?
You must use self:: or the class name when accessing the constant in your class:
if($var == self::UNKNOWN) {
echo "Unknown state";
return;
}
Documentation has the example of defining the constants in the PHP class.
self:: will help
class Constants
{
//define('MIN_VALUE', '0.0'); WRONG - Works OUTSIDE of a class definition.
//define('MAX_VALUE', '1.0'); WRONG - Works OUTSIDE of a class definition.
const MIN_VALUE = 0.0; // RIGHT - Works INSIDE of a class definition.
const MAX_VALUE = 1.0; // RIGHT - Works INSIDE of a class definition.
public static function getMinValue()
{
return self::MIN_VALUE;
}
public static function getMaxValue()
{
return self::MAX_VALUE;
}
}
for using every dynamic field in php you must call $this->field
and for using every static field and const in php you must call self::field
example:
class ApiController {
public static $static= "";
public $dynamic= "";
public function __construct() {
$a=$this->$dynamic;
$b=self::$static;
}
}
