<?php
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namespace PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
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use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
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use PhpOffice\PhpSpreadsheet\Calculation\Exception;
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use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
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use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
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class VLookup extends LookupBase
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{
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use ArrayEnabled;
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/**
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* VLOOKUP
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* The VLOOKUP function searches for value in the left-most column of lookup_array and returns the value
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* in the same row based on the index_number.
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*
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* @param mixed $lookupValue The value that you want to match in lookup_array
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* @param mixed $lookupArray The range of cells being searched
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* @param mixed $indexNumber The column number in table_array from which the matching value must be returned.
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* The first column is 1.
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* @param mixed $notExactMatch determines if you are looking for an exact match based on lookup_value
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*
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* @return mixed The value of the found cell
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*/
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public static function lookup(mixed $lookupValue, mixed $lookupArray, mixed $indexNumber, mixed $notExactMatch = true): mixed
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{
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if (is_array($lookupValue) || is_array($indexNumber)) {
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return self::evaluateArrayArgumentsIgnore([self::class, __FUNCTION__], 1, $lookupValue, $lookupArray, $indexNumber, $notExactMatch);
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}
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$notExactMatch = (bool) ($notExactMatch ?? true);
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try {
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self::validateLookupArray($lookupArray);
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$indexNumber = self::validateIndexLookup($lookupArray, $indexNumber);
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} catch (Exception $e) {
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return $e->getMessage();
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}
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$f = array_keys($lookupArray);
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$firstRow = array_pop($f);
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if ((!is_array($lookupArray[$firstRow])) || ($indexNumber > count($lookupArray[$firstRow]))) {
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return ExcelError::REF();
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}
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$columnKeys = array_keys($lookupArray[$firstRow]);
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$returnColumn = $columnKeys[--$indexNumber];
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$firstColumn = array_shift($columnKeys) ?? 1;
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if (!$notExactMatch) {
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/** @var callable $callable */
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$callable = [self::class, 'vlookupSort'];
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uasort($lookupArray, $callable);
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}
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$rowNumber = self::vLookupSearch($lookupValue, $lookupArray, $firstColumn, $notExactMatch);
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if ($rowNumber !== null) {
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// return the appropriate value
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return $lookupArray[$rowNumber][$returnColumn];
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}
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return ExcelError::NA();
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}
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private static function vlookupSort(array $a, array $b): int
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{
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reset($a);
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$firstColumn = key($a);
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$aLower = StringHelper::strToLower((string) $a[$firstColumn]);
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$bLower = StringHelper::strToLower((string) $b[$firstColumn]);
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if ($aLower == $bLower) {
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return 0;
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}
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return ($aLower < $bLower) ? -1 : 1;
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}
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/**
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* @param mixed $lookupValue The value that you want to match in lookup_array
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* @param int|string $column
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*/
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private static function vLookupSearch(mixed $lookupValue, array $lookupArray, $column, bool $notExactMatch): ?int
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{
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$lookupLower = StringHelper::strToLower((string) $lookupValue);
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$rowNumber = null;
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foreach ($lookupArray as $rowKey => $rowData) {
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$bothNumeric = is_numeric($lookupValue) && is_numeric($rowData[$column]);
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$bothNotNumeric = !is_numeric($lookupValue) && !is_numeric($rowData[$column]);
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$cellDataLower = StringHelper::strToLower((string) $rowData[$column]);
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// break if we have passed possible keys
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if (
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$notExactMatch
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&& (($bothNumeric && ($rowData[$column] > $lookupValue))
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|| ($bothNotNumeric && ($cellDataLower > $lookupLower)))
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) {
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break;
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}
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$rowNumber = self::checkMatch(
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$bothNumeric,
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$bothNotNumeric,
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$notExactMatch,
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$rowKey,
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$cellDataLower,
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$lookupLower,
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$rowNumber
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);
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}
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return $rowNumber;
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}
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}
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