从给定的mysql结果获取月数

Question

我试图获取按月注册的用户数量，以将其插入到chart.js中。我遇到的问题是每月显示计数结果。

我从mysql查询中得到以下结果

php print_r($this->results);

结果

Array (
  [0] => Array
    (
        [d] => 2018-05-15 21:54:08
    )

  [1] => Array
    (
        [d] => 2018-05-16 15:50:58
    )

  [2] => Array
    (
        [d] => 2018-06-18 18:27:11
    )

)

答案应该是：05 = 2和06 = 1

谢谢您的帮助！

Answer 1

码

$data = [];
$data[0]['d'] = '2018-05-15 21:54:08';
$data[1]['d'] = '2018-05-16 15:50:58';
$data[2]['d'] = '2018-06-18 18:27:11';

$result = [];
foreach( $data as $element ) {
    // convert date to timestramp by strToTime
    // get month via date( 'm' )
    $month = date( 'm', strToTime( $element['d'] ) );

    // if a count for month is present increment it
    if( isset( $result[$month] )) {
        $result[$month]++;
    } else { // if NO count is present, create and set to 1
        $result[$month] = 1;
    }
}

echo '<pre>';
var_dump($result);

结果

array(2) {
  ["05"]=>
  int(2)
  ["06"]=>
  int(1)
}

编辑

补充说明