好吧,所以我知道使用eval()并不是很好,但我无法为我的问题找到更好的解决方案,直到最近,没有性能原因不使用它.但是,我现在正在将足够的数据传递给函数,因为它正在花费不可接受的时间.

被调用的函数是：

public static function makeAMultiDimensionalArrayWithSumsBasedOnMultipleFields($inArray, $dimensionFieldNames, $sumFieldNameArray, $staticFieldNameArray = array())

{

$outArray = array();

// Just in case the array has indices, sort it so array_pop works as expected.

ksort($dimensionFieldNames);

foreach ($inArray as $row)

{

// make sure each row in the inArray has all keys specified by $dimensionFieldNames

$allFieldsPresent = TRUE;

foreach ($dimensionFieldNames as $keyFieldName)

{

if (!array_key_exists($keyFieldName, $row))

{

// Note that alternatively we could set the field to a specified default value.

$allFieldsPresent = FALSE;

}

}

if ($allFieldsPresent)

{

$indexString = '';

$keyFieldNameArrayCopy = $dimensionFieldNames;

foreach ($dimensionFieldNames as $keyFieldName)

{

$indexString .= "['" . $row[$keyFieldName] . "']";

// lets sum values

foreach ($sumFieldNameArray as $sumFieldName)

{

eval ('$outArray' . $indexString . '[' . $sumFieldName . '] += $row[' . $sumFieldName . '];');

}

foreach ($staticFieldNameArray as $staticFieldName)

{

eval ('$outArray' . $indexString . '[' . $staticFieldName . '] = $row[' . $staticFieldName . '];');

}

}

}

}

return $outArray;

}

它被称为这样：

makeAMultiDimensionalArrayWithSumsBasedOnMultipleFields($data, $dimensionArray, $sumArray, $staticArray);

传递给函数的变量类似于：

$dimensionArray = array("firstLevelID", "secondLevelID", "thirdLevelID", "fourthLevelID", "fifthLevelID");

$sumArray = array("revenue", "cost", "profit", "sales", "inquires", "cost", "walkins");

$staticArray = array("date", "storeID", "storeName", "productID", "productName", "managerID", "managerName", "salesperson");

所以我想重写函数,以便我不再使用eval().我花了相当多的时间在这上面,觉得是时候寻求一些建议了.

目标是获取一个数组数组,并根据$dimensionArray中的维度将其转换为多维数组.

我现在不想向你提供太多细节,所以请问你是否需要更多或有任何其他问题

最佳答案 哇,好的.第一次通过我错过了你的索引连接.试试这个：

if ($allFieldsPresent) {

$keys = array();

foreach ($dimensionFieldNames as $keyFieldName) {

$keys[] = $row[$keyFieldName];

// lets sum values

foreach ($sumFieldNameArray as $sumFieldName)

self::deepAssign($outArray, $keys, $sumFieldName, $row[$sumFieldName], true);

foreach ($staticFieldNameArray as $staticFieldName)

self::deepAssign($outArray, $keys, $staticFieldName, $row[$staticFieldName]);

}

}

protected static function deepAssign(&$array, $keys, $fieldName, $value, $sum = false) {

$target =& $array;

foreach ($keys as $key) {

if (!isset($target[$key]))

$target[$key] = array();

$target =& $target[$key];

}

if($sum)

$target[$fieldName] += $value;

else

$target[$fieldName] = $value;

}