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steven 2025-08-11 22:23:30 +02:00
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lib/PhpSpreadsheet/Calculation/LookupRef/ExcelMatch.php Normal file
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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
use PhpOffice\PhpSpreadsheet\Calculation\Internal\WildcardMatch;
use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
class ExcelMatch
{
use ArrayEnabled;
public const MATCHTYPE_SMALLEST_VALUE = -1;
public const MATCHTYPE_FIRST_VALUE = 0;
public const MATCHTYPE_LARGEST_VALUE = 1;
/**
* MATCH.
*
* The MATCH function searches for a specified item in a range of cells
*
* Excel Function:
* =MATCH(lookup_value, lookup_array, [match_type])
*
* @param mixed $lookupValue The value that you want to match in lookup_array
* @param mixed $lookupArray The range of cells being searched
* @param mixed $matchType The number -1, 0, or 1. -1 means above, 0 means exact match, 1 means below.
* If match_type is 1 or -1, the list has to be ordered.
*
* @return array|float|int|string The relative position of the found item
*/
public static function MATCH(mixed $lookupValue, mixed $lookupArray, mixed $matchType = self::MATCHTYPE_LARGEST_VALUE): array|string|int|float
{
if (is_array($lookupValue)) {
return self::evaluateArrayArgumentsIgnore([self::class, __FUNCTION__], 1, $lookupValue, $lookupArray, $matchType);
}
$lookupArray = Functions::flattenArray($lookupArray);
try {
// Input validation
self::validateLookupValue($lookupValue);
$matchType = self::validateMatchType($matchType);
self::validateLookupArray($lookupArray);
$keySet = array_keys($lookupArray);
if ($matchType == self::MATCHTYPE_LARGEST_VALUE) {
// If match_type is 1 the list has to be processed from last to first
$lookupArray = array_reverse($lookupArray);
$keySet = array_reverse($keySet);
}
$lookupArray = self::prepareLookupArray($lookupArray, $matchType);
} catch (Exception $e) {
return $e->getMessage();
}
// MATCH() is not case sensitive, so we convert lookup value to be lower cased if it's a string type.
if (is_string($lookupValue)) {
$lookupValue = StringHelper::strToLower($lookupValue);
}
$valueKey = match ($matchType) {
self::MATCHTYPE_LARGEST_VALUE => self::matchLargestValue($lookupArray, $lookupValue, $keySet),
self::MATCHTYPE_FIRST_VALUE => self::matchFirstValue($lookupArray, $lookupValue),
default => self::matchSmallestValue($lookupArray, $lookupValue),
};
if ($valueKey !== null) {
return ++$valueKey;
}
// Unsuccessful in finding a match, return #N/A error value
return ExcelError::NA();
}
private static function matchFirstValue(array $lookupArray, mixed $lookupValue): int|string|null
{
if (is_string($lookupValue)) {
$valueIsString = true;
$wildcard = WildcardMatch::wildcard($lookupValue);
} else {
$valueIsString = false;
$wildcard = '';
}
$valueIsNumeric = is_int($lookupValue) || is_float($lookupValue);
foreach ($lookupArray as $i => $lookupArrayValue) {
if (
$valueIsString
&& is_string($lookupArrayValue)
) {
if (WildcardMatch::compare($lookupArrayValue, $wildcard)) {
return $i; // wildcard match
}
} else {
if ($lookupArrayValue === $lookupValue) {
return $i; // exact match
}
if (
$valueIsNumeric
&& (is_float($lookupArrayValue) || is_int($lookupArrayValue))
&& $lookupArrayValue == $lookupValue
) {
return $i; // exact match
}
}
}
return null;
}
private static function matchLargestValue(array $lookupArray, mixed $lookupValue, array $keySet): mixed
{
if (is_string($lookupValue)) {
if (Functions::getCompatibilityMode() === Functions::COMPATIBILITY_OPENOFFICE) {
$wildcard = WildcardMatch::wildcard($lookupValue);
foreach (array_reverse($lookupArray) as $i => $lookupArrayValue) {
if (is_string($lookupArrayValue) && WildcardMatch::compare($lookupArrayValue, $wildcard)) {
return $i;
}
}
} else {
foreach ($lookupArray as $i => $lookupArrayValue) {
if ($lookupArrayValue === $lookupValue) {
return $keySet[$i];
}
}
}
}
$valueIsNumeric = is_int($lookupValue) || is_float($lookupValue);
foreach ($lookupArray as $i => $lookupArrayValue) {
if ($valueIsNumeric && (is_int($lookupArrayValue) || is_float($lookupArrayValue))) {
if ($lookupArrayValue <= $lookupValue) {
return array_search($i, $keySet);
}
}
$typeMatch = gettype($lookupValue) === gettype($lookupArrayValue);
if ($typeMatch && ($lookupArrayValue <= $lookupValue)) {
return array_search($i, $keySet);
}
}
return null;
}
private static function matchSmallestValue(array $lookupArray, mixed $lookupValue): int|string|null
{
$valueKey = null;
if (is_string($lookupValue)) {
if (Functions::getCompatibilityMode() === Functions::COMPATIBILITY_OPENOFFICE) {
$wildcard = WildcardMatch::wildcard($lookupValue);
foreach ($lookupArray as $i => $lookupArrayValue) {
if (is_string($lookupArrayValue) && WildcardMatch::compare($lookupArrayValue, $wildcard)) {
return $i;
}
}
}
}
$valueIsNumeric = is_int($lookupValue) || is_float($lookupValue);
// The basic algorithm is:
// Iterate and keep the highest match until the next element is smaller than the searched value.
// Return immediately if perfect match is found
foreach ($lookupArray as $i => $lookupArrayValue) {
$typeMatch = gettype($lookupValue) === gettype($lookupArrayValue);
$bothNumeric = $valueIsNumeric && (is_int($lookupArrayValue) || is_float($lookupArrayValue));
if ($lookupArrayValue === $lookupValue) {
// Another "special" case. If a perfect match is found,
// the algorithm gives up immediately
return $i;
}
if ($bothNumeric && $lookupValue == $lookupArrayValue) {
return $i; // exact match, as above
}
if (($typeMatch || $bothNumeric) && $lookupArrayValue >= $lookupValue) {
$valueKey = $i;
} elseif ($typeMatch && $lookupArrayValue < $lookupValue) {
//Excel algorithm gives up immediately if the first element is smaller than the searched value
break;
}
}
return $valueKey;
}
private static function validateLookupValue(mixed $lookupValue): void
{
// Lookup_value type has to be number, text, or logical values
if ((!is_numeric($lookupValue)) && (!is_string($lookupValue)) && (!is_bool($lookupValue))) {
throw new Exception(ExcelError::NA());
}
}
private static function validateMatchType(mixed $matchType): int
{
// Match_type is 0, 1 or -1
// However Excel accepts other numeric values,
// including numeric strings and floats.
// It seems to just be interested in the sign.
if (!is_numeric($matchType)) {
throw new Exception(ExcelError::Value());
}
if ($matchType > 0) {
return self::MATCHTYPE_LARGEST_VALUE;
}
if ($matchType < 0) {
return self::MATCHTYPE_SMALLEST_VALUE;
}
return self::MATCHTYPE_FIRST_VALUE;
}
private static function validateLookupArray(array $lookupArray): void
{
// Lookup_array should not be empty
$lookupArraySize = count($lookupArray);
if ($lookupArraySize <= 0) {
throw new Exception(ExcelError::NA());
}
}
private static function prepareLookupArray(array $lookupArray, mixed $matchType): array
{
// Lookup_array should contain only number, text, or logical values, or empty (null) cells
foreach ($lookupArray as $i => $value) {
// check the type of the value
if ((!is_numeric($value)) && (!is_string($value)) && (!is_bool($value)) && ($value !== null)) {
throw new Exception(ExcelError::NA());
}
// Convert strings to lowercase for case-insensitive testing
if (is_string($value)) {
$lookupArray[$i] = StringHelper::strToLower($value);
}
if (
($value === null)
&& (($matchType == self::MATCHTYPE_LARGEST_VALUE) || ($matchType == self::MATCHTYPE_SMALLEST_VALUE))
) {
unset($lookupArray[$i]);
}
}
return $lookupArray;
}
}