在智能循环中以树格式打印

Question

I have a array of date and name; I need to show it in tree structure in a minimum code.

$myarray = Array
(
    [0] => 
        Array
        (
            'Name' => 'Ron',
            'date' => '2014-01-05'
        )    
    [1] =>
        Array
        (
            'Name' => 'Sam',
            'Value' => '2014-01-10'
        ) 
    [2] => 
        Array
        (
            'Name' => 'Samuel',
            'date' => '2014-08-25'
        )    
    [3] =>
        Array
        (
            'Name' => 'Deniel',
            'Value' => '2015-01-10'
        ) 
 );

I need to print in following ways

2014
    JAN
      Ron
      Sam
    AUG
      Samuel
2015
    JAN
      Daniel

Answer 1

If the your input array is already sorted(prepared) by date and name for printing:

foreach ($myarray as $item) {
    $date = explode('-', $item['date']);
    if (empty($year) || $year != $date[0]) {
        $year = $date[0];
        print "{$year}
";
    }
    if (empty($month) || $month != $date[1]) {
        $month = $date[1];
        print "\t" . strtoupper(date("M", mktime(0, 0, 0, $month, 1, $year))) . "
";
    }

    print "\t\t{$item['Name']}
";
}

If the input array is need to be sorted(prepared) before being printing:

// Dissecting input array by years and months
$resultArray = array();
foreach ($myarray as $item) {
    $date = explode('-', $item['date']);
    if (!array_key_exists($date[0], $resultArray)) {
        $resultArray[$date[0]] = array();
    }
    if (!array_key_exists($date[1], $resultArray[$date[0]])) {
        $resultArray[$date[0]][$date[1]] = array();
    }

    $resultArray[$date[0]][$date[1]][] = $item['Name'];
}

// Printing the result
ksort($resultArray);
foreach ($resultArray as $year => $yearItems) {
    print "{$year}
";
    ksort($yearItems);
    foreach ($yearItems as $month => $monthNames) {
        print "\t" . strtoupper(date("M", mktime(0, 0, 0, $month, 1, $year))) . "
";
        sort($monthNames); // You may remove this line if you don`t need sorting by names
        foreach ($monthNames as $name) {
            print "\t\t{$name}
";
        }
    }
}