PHP Scoring

<?php

    $score = array(
        array(
            "uid" => 122,   //uid
            100, //a
            50   //b
        ),

        array(
            "uid" => 230,   //uid
            150,    //a
            20      //b
        ),
    );

    $a = array(); // new array for type a scores
    $b = array(); // new array for type b scores
    $ab = array();// new array for type ab scores

    //We want to add all user scores to the appropriate arrays
    foreach($score as $k => $v) {
        $a[$score[$k]["uid"]] = $score[$k][0]; //Place all A scores into array with users UID as key
        $b[$score[$k]["uid"]] = $score[$k][1];  //Place all A scores into array with users UID as key
        $ab[$score[$k]["uid"]] = $score[$k][0] + $score[$k][1]; //Place A+B scores into array with users UID as key
    }

    arsort($a); //Sort a
    arsort($b); //Sort B
    arsort($ab);//Sort A+B

    print("User search: 230 \n A:");
    echo array_search("230",array_keys($a)) + 1; //Find user position in array and add 1
    print("\n B:");
    echo array_search("230",array_keys($b)) + 1; //Find user position in array and add 1
    print("\n A+B:");
    echo array_search("230",array_keys($ab)) + 1; //Find user position in array and add 1


    ####################Expected Output#####################
    ### User search: 230                                   #
    ### A:1                                                #
    ### B:2                                                #
    ### A+B:1                                              #
    ########################################################

?>