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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
class HLookup extends LookupBase
{
/**
* HLOOKUP
* The HLOOKUP function searches for value in the top-most row of lookup_array and returns the value
* in the same column based on the index_number.
*
* @param mixed $lookupValue The value that you want to match in lookup_array
* @param mixed $lookupArray The range of cells being searched
* @param mixed $indexNumber The row number in table_array from which the matching value must be returned.
* The first row is 1.
* @param mixed $notExactMatch determines if you are looking for an exact match based on lookup_value
*
* @return mixed The value of the found cell
*/
public static function lookup($lookupValue, $lookupArray, $indexNumber, $notExactMatch = true)
{
$lookupValue = Functions::flattenSingleValue($lookupValue);
$indexNumber = Functions::flattenSingleValue($indexNumber);
$notExactMatch = ($notExactMatch === null) ? true : Functions::flattenSingleValue($notExactMatch);
try {
$indexNumber = self::validateIndexLookup($lookupArray, $indexNumber);
} catch (Exception $e) {
return $e->getMessage();
}
$f = array_keys($lookupArray);
$firstRow = reset($f);
if ((!is_array($lookupArray[$firstRow])) || ($indexNumber > count($lookupArray))) {
return Functions::REF();
}
$firstkey = $f[0] - 1;
$returnColumn = $firstkey + $indexNumber;
$firstColumn = array_shift($f);
$rowNumber = self::hLookupSearch($lookupValue, $lookupArray, $firstColumn, $notExactMatch);
if ($rowNumber !== null) {
// otherwise return the appropriate value
return $lookupArray[$returnColumn][$rowNumber];
}
return Functions::NA();
}
private static function hLookupSearch($lookupValue, $lookupArray, $column, $notExactMatch)
{
$lookupLower = StringHelper::strToLower($lookupValue);
$rowNumber = null;
foreach ($lookupArray[$column] as $rowKey => $rowData) {
// break if we have passed possible keys
$bothNumeric = is_numeric($lookupValue) && is_numeric($rowData);
$bothNotNumeric = !is_numeric($lookupValue) && !is_numeric($rowData);
$cellDataLower = StringHelper::strToLower($rowData);
if (
$notExactMatch &&
(($bothNumeric && $rowData > $lookupValue) || ($bothNotNumeric && $cellDataLower > $lookupLower))
) {
break;
}
$rowNumber = self::checkMatch(
$bothNumeric,
$bothNotNumeric,
$notExactMatch,
$rowKey,
$cellDataLower,
$lookupLower,
$rowNumber
);
}
return $rowNumber;
}
}