server/Gameserver/Public/gamesys/app/providers/retention.php

<?php

/*
 * 留存1
 */
include_once dirname(__FILE__) . '/../main.php';

$params = query_paras();
$date = $params['date'];

$numbers = array(1, 3, 5, 7, 15, 30);                                           # 留存天数
$array = array();
$array2 = array();

// 计算新增人数
$tabName = "tab_rolename";
$new = daoInst()->select('*')->from($tabName)
        ->where('ts')->ge($date . " 00:00:00")
        ->andWhere('ts')->le($date . " 23:59:59")
        ->count();
$array[] = intval($new);

// 遍历 留存天数数组, 计算相应留存/率
array_map(function ($n)use($date, $tabName, $new, &$array, &$array2) {
    $iday = strtotime("$date   +$n   day");
    $day = date("Y-m-d", $iday);
    $total = daoInst()->select('*')->from($tabName)
            ->where('ts')->ge($date . " 00:00:00")
            ->andWhere('ts')->le($date . " 23:59:59")
            ->andWhere('lastlogin')->ge($day . " 00:00:00")
            ->count();
    $array[] = $total;                                                          # 输出
    $array2[] = (int) ($total / $new * 100);                                    # 输出
}, $numbers);
// 

$result = new stdClass();
$result->data1 = $array;
$result->data2 = $array2;
echo json_encode($result);