Question

我正在编写一个函数来从数组中获取值datetime值并将其转换为小时和分钟格式，如0010.我想使用它来稍后从数组中提取其他值，因为这是一个关联数组

function getData($lengthArray, $csvdat) {  # passing down the values of the array and the length of the array
                 $newData = array(  
                            'nightTime1',
                            'nightTime2',
                            'dayTime1',
                            'peakTime',
                            'dayTime2',
                            'winterNightTime1',
                            'winterNightTime2',
                            'winterDayTime1',
                            'winterDayTime2',
                            'winterPeakTime');

                for ($count = 0; $count <= $lengthArray; $count++ ) {  #looping to the length of the array

                        $arrayTimestamp = $csvdat[$count]['timestamp']; 
                        $comparator = date('Hs', strtotime($arrayTimestamp)); #extracting the time format            
                        $nightTime1 = 0759;
                        $dayTime1 =   1659; 
                        $peakTime = 1859;   
                        $dayTime2 = 2259;   
                        $nightTime2 = 2359;

                        if ( $comparator ==  $nightTime1 ) {
                                if (empty($newData['nightTime1'])) {
                                        $newData['nightTime1'] = $nightTime;
                                        $newData['nightTime1']['phase1'] = $csvdat[$count++]['day_chan1'];
                                        $newData['nightTime1']['phase1'] = $csvdat[$count++]['day_chan2'];
                                        $newData['nightTime1']['phase1'] = $csvdat[$count++]['day_chan3'];                                          
                                }
                                else if (!empty($newData)) {

                                }

                        }

                }

                return $newData;


          }
            getData($lengthData , $csvdata);

            var_dump($newData);

我现在面临的问题是我在行

处得到一个未定义的偏移错误

$arrayTimestamp = $csvdat[$count]['timestamp'];

和$newData的未定义变量。我不是很擅长php，所以请指教。

以下是var_dump数组

的csvdat

  array (size=118061)
  0 => 
    array (size=15)
      'timestamp' => string '01/02/2014 00:00' (length=16)
      'curr_property' => string '5972' (length=4)
      'curr_property_cost' => string '62' (length=2)
      'day_property' => string '19' (length=2)
      'day_property_cost' => string '0' (length=1)
      'curr_solar_generating' => string '2898' (length=4)
      'curr_solar_export' => string '0' (length=1)
      'day_solar_generated' => string '9' (length=1)
      'day_solar_export' => string '0' (length=1)
      'curr_chan1' => string '2189' (length=4)
      'curr_chan2' => string '2898' (length=4)
      'curr_chan3' => string '885' (length=3)
      'day_chan1' => string '7' (length=1)
      'day_chan2' => string '9' (length=1)
      'day_chan3' => string '2' (length=1)
  1 => 
    array (size=15)
      'timestamp' => string '01/02/2014 00:00' (length=16)
      'curr_property' => string '5215' (length=4)
      'curr_property_cost' => string '54' (length=2)
      'day_property' => string '37' (length=2)
      'day_property_cost' => string '0' (length=1)
      'curr_solar_generating' => string '2141' (length=4)
      'curr_solar_export' => string '0' (length=1)
      'day_solar_generated' => string '16' (length=2)
      'day_solar_export' => string '0' (length=1)
      'curr_chan1' => string '2173' (length=4)
      'curr_chan2' => string '2141' (length=4)
      'curr_chan3' => string '901' (length=3)
      'day_chan1' => string '14' (length=2)
      'day_chan2' => string '16' (length=2)
      'day_chan3' => string '5' (length=1)
  2 => 
    array (size=15)
      'timestamp' => string '01/02/2014 00:00' (length=16)
      'curr_property' => string '5215' (length=4)
      'curr_property_cost' => string '54' (length=2)
      'day_property' => string '54' (length=2)
      'day_property_cost' => string '0' (length=1)
      'curr_solar_generating' => string '2157' (length=4)
      'curr_solar_export' => string '0' (length=1)
      'day_solar_generated' => string '23' (length=2)
      'day_solar_export' => string '0' (length=1)
      'curr_chan1' => string '2157' (length=4)
      'curr_chan2' => string '2157' (length=4)
      'curr_chan3' => string '901' (length=3)
      'day_chan1' => string '21' (length=2)
      'day_chan2' => string '23' (length=2)
      'day_chan3' => string '8' (length=1)
  3 => 
    array (size=15)
      'timestamp' => string '01/02/2014 00:00' (length=16)
      'curr_property' => string '5183' (length=4)
      'curr_property_cost' => string '54' (length=2)
      'day_property' => string '71' (length=2)
      'day_property_cost' => string '0' (length=1)
      'curr_solar_generating' => string '2125' (length=4)
      'curr_solar_export' => string '0' (length=1)
      'day_solar_generated' => string '31' (length=2)
      'day_solar_export' => string '0' (length=1)
      'curr_chan1' => string '2173' (length=4)
      'curr_chan2' => string '2125' (length=4)
      'curr_chan3' => string '885' (length=3)
      'day_chan1' => string '28' (length=2)
      'day_chan2' => string '31' (length=2)
      'day_chan3' => string '11' (length=2)

Answer 1

尝试

for ($count = 0; $count < $lengthArray; $count++ )

而不是

for ($count = 0; $count <= $lengthArray; $count++ )

Answer 2

如果并且只有当您100％确定$lengthArray是$csvdat数组的大小时，那么您的错误是由此行引起的：

for ($count = 0; $count <= $lengthArray; $count++ ) {

应该是

for ($count = 0; $count < $lengthArray; $count++ ) {

如果$count低于$lengthArray或与3相同，那么你现在正在打破循环。请注意，数组中的最后一个键是4，其长度为var_dump($newData)。

修改

现在关于未定义的变量：$ newData 。

您正在尝试getData未定义。它存在于$newData = getData($lengthData , $csvdata); var_dump($newData);函数内部，但不在其外部。也许你想这样做：

{{1}}

Answer 3

应该 $ count＆lt; for循环中的$ lengthArray

for ($count = 0; $count < $lengthArray; $count++ ) {
}

即使已定义，也会出现未定义的偏移错误和未定义的变量错误

3 个答案:

修改