使用xpath和；php

因此，我的XML文档如下所示：

<output>
   <workouts>
       <workout>
         <workout_date>
           <![CDATA[ 2014-04-05 ]]>
         </workout_date>
         <distance>
           <![CDATA[ 15 ]]>
         </distance>
       </workout>
       <workout>
         <workout_date>
           <![CDATA[ 2014-04-08 ]]>
         </workout_date>
         <distance>
           <![CDATA[ 2 ]]>
         </distance>
       </workout>
       <workout>
         <workout_date>
           <![CDATA[ 2014-03-28 ]]>
         </workout_date>
         <distance>
           <![CDATA[ 3.3 ]]>
         </distance>
       </workout>

   </workouts>
</output>

这将只输出唯一的值，因此我不会每月重复，但是，我无法输出每个月的所有

“距离”

值之和。因此，从本质上讲，最终结果将如下所示：

<output>
   <workouts>
       <workout>
         <workout_date>
           <![CDATA[ 2014-04-05 ]]>
         </workout_date>
         <distance>
           <![CDATA[ 15 ]]>
         </distance>
       </workout>
       <workout>
         <workout_date>
           <![CDATA[ 2014-04-08 ]]>
         </workout_date>
         <distance>
           <![CDATA[ 2 ]]>
         </distance>
       </workout>
       <workout>
         <workout_date>
           <![CDATA[ 2014-03-28 ]]>
         </workout_date>
         <distance>
           <![CDATA[ 3.3 ]]>
         </distance>
       </workout>

   </workouts>
</output>

结果:

四月

总距离=17

行军

总距离=3.3

等等

---

我不确定PHP是否提供了XPath/XQuery 3支持，但如果提供了，您可以使用此表达式实现所需的功能：

for $workout in /output/workouts/workout
let $date := xs:date($workout/workout_date)
let $month := month-from-date($date)
let $year := year-from-date($date)
group by $year, $month
return
    let $padded-month := substring(concat('0', $month), string-length(string($month)))
    let $month-year := format-date(xs:date(string-join((string($year), $padded-month, '01'), "-")), "[MNn] [Y]")
    return
        ($month-year, sum($workout/distance))

---

我能用这种逻辑把他们分组。现在只需要从数组中添加距离值

 $distanceforDate = array();
    foreach ($typesList as $type) {
     $Data = $xml->xpath('output/workouts/workout[workout_date="' . $type . '"]');
        $M = date('F', strtotime($type));
        if (!empty($Data)) {
            foreach ($Data as $rawData) {
                //print_r ($M);
                $distanceforDate[$M][] = '' . $rawData->distance;
            }
        }
    }
  print_r($distanceforDate);
    echo array_sum($distanceforDate);


}