$this refers to the current class instance. But static methods can be accessed without instantiating the class, and $this
is not available to them. Using $this in a static context will result in a fatal error at runtime.
Noncompliant Code Example
class Clazz {
$name=NULL; // instance variable
public static function foo(){
if ($this->name != NULL) {
// ...
}
}
}
Compliant Solution
class Clazz {
$name=NULL; // instance variable
public static function foo($nameParam){
if ($nameParam != NULL) {
// ...
}
}
}
