uksort不起作用-回调未执行或异常

Question

I am trying to use uksort in PHP 5.5 to sort an array by its key. This does not work. Either an exception is thrown, that the specified class is invalid or nothing happens:

namespace some\name\space

class myClass extends someClass {
   public function someFunction {
       $theArray = array(
           "key1" => "value1",
           "key2" => "value2",
           ...
           "keyN" => "valueN"
       );

       // Exception "Fatal Error: Class name must be a valid object or a string"
       uksort($theArray, array($this, "sorterFunc"));
       uksort($theArray, array("someClass", "sorterFunc"));
       uksort($theArray, array("some\name\space\someClass", "sorterFunc"));
       uksort($theArray, "self::sorterFunc");
       uksort($theArray, "some\name\space\someClass::sorterFunc");

       // No effect. No logging from sorterFunc and 
       // key/value order stays the same.
       uksort($theArray, "sorterFunc");
       uksort($theArray, "someClass::sorterFunc");
   }

   public static function sorterFunc($a, $b) {
       myLogger->info("sorterFunc called");
       return $this->CompareASomehowToB($a, $b);
   }
}

So none of the calls I found in the docu or in any example work. When I skip uksort and use call_user_func the result is exactly the same.

So, what might be wrong here?

Answer 1

您正在尝试调用someClass::sorterFunc ，因为它实际上是myClass::sorterFunc因为您正在使用myClass扩展someClass 。

uksort($theArray, "myClass::sorterFunc");