NYCPHP Meetup

[corey szopinski]

I have a need to use a callback function from uasort within a class, and I¹m
having a hard time figuring out how to pass the name of the custom sort
method in as the second parameter (it¹s a string... not a reference).

For example, here the basic code structure:

class StoreLocator{

    function searchByZip($zip){
        [ some code that builds a store array ]
        
        $stores[0]['name'] = "store1";
        $stores[0]['distance'] = "3.4";
        $stores[0]['name'] = "store2";
        $stores[0]['distance'] = "5.6";
    
        uasort($stores, 'sortDistance');
        
        return $stores;
    }



    function sortDistance($a,$b){
        if($a['distance'] == $b['distance']) return 0;
        return ($a['distance'] > $b['distance']) ? 1 : -1;
    }

}


So, in the code 

uasort($stores, 'sortDistance');

doesn't work, I've also tried:

$sortDistance &= $this->sortDistance();

uasort($stores, 'sortDistance');

This technique is able to find the method sortDistance, but isn't able to
pass in the ($a, $b) arrays to sort.


The last thing I've tried is

$sortDistance &= $this->sortDistance($a, $b);

uasort($stores, 'sortDistance');

Which also doesn't work. Any ideas?


- Corey