Miscellany

<?phpclass record {    public $key;    public $value;    public function __construct($key, $value) {        $this->key = $key;        $this->value = $value;    }}$records = array(1 => new record(1,1),                 3 => new record(3,3),                 2 => new record(2,2),                 4 => new record(4,4),                 );//displayvar_dump($records);//get keys in an array$keys = array(null);foreach ($records as $record) {    $keys[] = $record->key;}//displayvar_dump($keys);//loop through 1 - Nfor ( $j = 2; $j <= count($records) ; $j++ ) {    $i = $j - 1;    $k = $keys[$j];    $r = $records[$j];    while ( $k >= $keys[$i] ) {        $records[$i + 1] = $records[$i];                $i--;        if ( $i <= 0 ) {            break;        }    }    $records[$i + 1] = $r; }//display outputvar_dump($records);