0

したがって、次の関数を使用して列名を分析しようとしています

function disectColumnName($columnName){
    echo "fieldname: " .$columnName. "<br>";
    $periodLengths = array("min","hr","dy","wk");   # Array of periodLength Options
    $periodLength = $periodLengths[array_search($columnName, $periodLengths)];  # Find which periodLength is used in columnName and sa
    $periodDuration = substr($columnName, 0, strpos($columnName,$periodLength));
    echo 'periodLength: '.$periodLength . "<br>";
    echo 'periodDuration: '.$periodDuration . "<br>";
    $movingAverages = array("e","s");
    $movingAverageLoc = $movingAverages[array_search($columnName, $movingAverages)];
    echo "movingAverageLoc: " .$movingAverageLoc . "<br>";
    $startOfString = strpos($columnName,$periodLength)+strlen($periodLength);
    $stringLength = strpos($columnName,$movingAverageLoc)-(strpos($columnName,$periodLength)+strlen($periodLength));
    # strpos($columnName,$movingAverageLoc) returns blank, should return strpos when movingAverages = "S"
    echo "StartOf: ". $startOfString . "<br>";
    echo "StrLen: ". $stringLength . "<br>";
    $movingAverage = substr($columnName,$startOfString,$stringLength);
    echo 'movingAverage: '.$movingAverage;
}

disectColumnName次の列タイトルの配列を処理するループ内にあります -

 array(12) { [0]=> string(7) "14min3e" [1]=> string(7) "14min4e" [2]=> string(8) "14min41e" [3]=> string(7) "14min3s" [4]=> string(8) "14min41s" [5]=> string(8) "14min32s" [6]=> string(9) "14min321s" [7]=> string(9) "15min321s" [8]=> string(8) "15min41s" [9]=> string(9) "15min321e" [10]=> string(8) "15min41e" [11]=> string(8) "15min32e" }

問題は、で終わる列のタイトル's'が正しいStringLengthorを生成していないmovingAverageLocことです ( のe代わりに表示されていますS)。ただし、列名が で終わる場合'e'、それは完全に機能しますが、何が得られますか?

現在出力されているものは次のとおりです。

fieldname: 14min3e
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: 1
movingAverage: 3

fieldname: 14min4e
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: 1
movingAverage: 4

fieldname: 14min41e
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: 2
movingAverage: 41

fieldname: 14min3s
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: -5
movingAverage: 

fieldname: 14min41s
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: -5
movingAverage: 

fieldname: 14min32s
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: -5
movingAverage: 

fieldname: 14min321s
periodLength: min
periodDuration: 14
movingAverageLoc: e
StartOf: 5
StrLen: -5
movingAverage: 

fieldname: 15min321s
periodLength: min
periodDuration: 15
movingAverageLoc: e
StartOf: 5
StrLen: -5
movingAverage: 

fieldname: 15min41s
periodLength: min
periodDuration: 15
movingAverageLoc: e
StartOf: 5
StrLen: -5
movingAverage: 

fieldname: 15min321e
periodLength: min
periodDuration: 15
movingAverageLoc: e
StartOf: 5
StrLen: 3
movingAverage: 321

fieldname: 15min41e
periodLength: min
periodDuration: 15
movingAverageLoc: e
StartOf: 5
StrLen: 2
movingAverage: 41

fieldname: 15min32e
periodLength: min
periodDuration: 15
movingAverageLoc: e
StartOf: 5
StrLen: 2
movingAverage: 32
4

2 に答える 2

1

この行で：

$movingAverageLoc = $movingAverages[array_search($columnName, $movingAverages)];

この部分：

array_search($columnName, $movingAverages)

たとえば、列名「15min41e」の配列 array("e","s") を検索しています。列名が「e」または「s」でない限り、常に false が返されます。したがって、すべてのサンプルデータについて、基本的にこれを行っています：

$movingAverageLoc = $movingAverages[false];

これは次と同じです:

$movingAverageLoc = $movingAverages[0];

これが、$movingAverageLoc に対して常に "e" を取得している理由です。少なくともその行を修正する必要があります。

ただし、やりたいことを行うためのはるかに簡単な (混乱の少ない) 方法があります。preg_splitを 1 つに使用する:

$string = "1wk2dy5hr15min431e";
$res = preg_split('~([0-9]+)([a-z]+)~i', $string, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);
print_r($res);

結果:

Array
(
    [0] => 1
    [1] => wk
    [2] => 2
    [3] => dy
    [4] => 5
    [5] => hr
    [6] => 15
    [7] => min
    [8] => 431
    [9] => e
)
于 2013-04-22T21:17:10.843 に答える