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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation;
class Logical
{
/**
* TRUE.
*
* Returns the boolean TRUE.
*
* Excel Function:
* =TRUE()
*
* @category Logical Functions
*
* @return bool True
*/
public static function true()
{
return true;
}
/**
* FALSE.
*
* Returns the boolean FALSE.
*
* Excel Function:
* =FALSE()
*
* @category Logical Functions
*
* @return bool False
*/
public static function false()
{
return false;
}
private static function countTrueValues(array $args)
{
$returnValue = 0;
foreach ($args as $arg) {
// Is it a boolean value?
if (is_bool($arg)) {
$returnValue += $arg;
} elseif ((is_numeric($arg)) && (!is_string($arg))) {
$returnValue += ((int) $arg != 0);
} elseif (is_string($arg)) {
$arg = strtoupper($arg);
if (($arg == 'TRUE') || ($arg == Calculation::getTRUE())) {
$arg = true;
} elseif (($arg == 'FALSE') || ($arg == Calculation::getFALSE())) {
$arg = false;
} else {
return Functions::VALUE();
}
$returnValue += ($arg != 0);
}
}
return $returnValue;
}
/**
* LOGICAL_AND.
*
* Returns boolean TRUE if all its arguments are TRUE; returns FALSE if one or more argument is FALSE.
*
* Excel Function:
* =AND(logical1[,logical2[, ...]])
*
* The arguments must evaluate to logical values such as TRUE or FALSE, or the arguments must be arrays
* or references that contain logical values.
*
* Boolean arguments are treated as True or False as appropriate
* Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
* If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
* the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
*
* @category Logical Functions
*
* @param mixed ...$args Data values
*
* @return bool|string the logical AND of the arguments
*/
public static function logicalAnd(...$args)
{
$args = Functions::flattenArray($args);
if (count($args) == 0) {
return Functions::VALUE();
}
$args = array_filter($args, function ($value) {
return $value !== null || (is_string($value) && trim($value) == '');
});
$argCount = count($args);
$returnValue = self::countTrueValues($args);
if (is_string($returnValue)) {
return $returnValue;
}
return ($returnValue > 0) && ($returnValue == $argCount);
}
/**
* LOGICAL_OR.
*
* Returns boolean TRUE if any argument is TRUE; returns FALSE if all arguments are FALSE.
*
* Excel Function:
* =OR(logical1[,logical2[, ...]])
*
* The arguments must evaluate to logical values such as TRUE or FALSE, or the arguments must be arrays
* or references that contain logical values.
*
* Boolean arguments are treated as True or False as appropriate
* Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
* If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
* the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
*
* @category Logical Functions
*
* @param mixed $args Data values
*
* @return bool|string the logical OR of the arguments
*/
public static function logicalOr(...$args)
{
$args = Functions::flattenArray($args);
if (count($args) == 0) {
return Functions::VALUE();
}
$args = array_filter($args, function ($value) {
return $value !== null || (is_string($value) && trim($value) == '');
});
$returnValue = self::countTrueValues($args);
if (is_string($returnValue)) {
return $returnValue;
}
return $returnValue > 0;
}
/**
* LOGICAL_XOR.
*
* Returns the Exclusive Or logical operation for one or more supplied conditions.
* i.e. the Xor function returns TRUE if an odd number of the supplied conditions evaluate to TRUE, and FALSE otherwise.
*
* Excel Function:
* =XOR(logical1[,logical2[, ...]])
*
* The arguments must evaluate to logical values such as TRUE or FALSE, or the arguments must be arrays
* or references that contain logical values.
*
* Boolean arguments are treated as True or False as appropriate
* Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
* If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
* the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
*
* @category Logical Functions
*
* @param mixed $args Data values
*
* @return bool|string the logical XOR of the arguments
*/
public static function logicalXor(...$args)
{
$args = Functions::flattenArray($args);
if (count($args) == 0) {
return Functions::VALUE();
}
$args = array_filter($args, function ($value) {
return $value !== null || (is_string($value) && trim($value) == '');
});
$returnValue = self::countTrueValues($args);
if (is_string($returnValue)) {
return $returnValue;
}
return $returnValue % 2 == 1;
}
/**
* NOT.
*
* Returns the boolean inverse of the argument.
*
* Excel Function:
* =NOT(logical)
*
* The argument must evaluate to a logical value such as TRUE or FALSE
*
* Boolean arguments are treated as True or False as appropriate
* Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
* If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
* the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
*
* @category Logical Functions
*
* @param mixed $logical A value or expression that can be evaluated to TRUE or FALSE
*
* @return bool|string the boolean inverse of the argument
*/
public static function NOT($logical = false)
{
$logical = Functions::flattenSingleValue($logical);
if (is_string($logical)) {
$logical = strtoupper($logical);
if (($logical == 'TRUE') || ($logical == Calculation::getTRUE())) {
return false;
} elseif (($logical == 'FALSE') || ($logical == Calculation::getFALSE())) {
return true;
}
return Functions::VALUE();
}
return !$logical;
}
/**
* STATEMENT_IF.
*
* Returns one value if a condition you specify evaluates to TRUE and another value if it evaluates to FALSE.
*
* Excel Function:
* =IF(condition[,returnIfTrue[,returnIfFalse]])
*
* Condition is any value or expression that can be evaluated to TRUE or FALSE.
* For example, A10=100 is a logical expression; if the value in cell A10 is equal to 100,
* the expression evaluates to TRUE. Otherwise, the expression evaluates to FALSE.
* This argument can use any comparison calculation operator.
* ReturnIfTrue is the value that is returned if condition evaluates to TRUE.
* For example, if this argument is the text string "Within budget" and the condition argument evaluates to TRUE,
* then the IF function returns the text "Within budget"
* If condition is TRUE and ReturnIfTrue is blank, this argument returns 0 (zero). To display the word TRUE, use
* the logical value TRUE for this argument.
* ReturnIfTrue can be another formula.
* ReturnIfFalse is the value that is returned if condition evaluates to FALSE.
* For example, if this argument is the text string "Over budget" and the condition argument evaluates to FALSE,
* then the IF function returns the text "Over budget".
* If condition is FALSE and ReturnIfFalse is omitted, then the logical value FALSE is returned.
* If condition is FALSE and ReturnIfFalse is blank, then the value 0 (zero) is returned.
* ReturnIfFalse can be another formula.
*
* @category Logical Functions
*
* @param mixed $condition Condition to evaluate
* @param mixed $returnIfTrue Value to return when condition is true
* @param mixed $returnIfFalse Optional value to return when condition is false
*
* @return mixed The value of returnIfTrue or returnIfFalse determined by condition
*/
public static function statementIf($condition = true, $returnIfTrue = 0, $returnIfFalse = false)
{
$condition = ($condition === null) ? true : (bool) Functions::flattenSingleValue($condition);
$returnIfTrue = ($returnIfTrue === null) ? 0 : Functions::flattenSingleValue($returnIfTrue);
$returnIfFalse = ($returnIfFalse === null) ? false : Functions::flattenSingleValue($returnIfFalse);
return ($condition) ? $returnIfTrue : $returnIfFalse;
}
/**
* IFERROR.
*
* Excel Function:
* =IFERROR(testValue,errorpart)
*
* @category Logical Functions
*
* @param mixed $testValue Value to check, is also the value returned when no error
* @param mixed $errorpart Value to return when testValue is an error condition
*
* @return mixed The value of errorpart or testValue determined by error condition
*/
public static function IFERROR($testValue = '', $errorpart = '')
{
$testValue = ($testValue === null) ? '' : Functions::flattenSingleValue($testValue);
$errorpart = ($errorpart === null) ? '' : Functions::flattenSingleValue($errorpart);
return self::statementIf(Functions::isError($testValue), $errorpart, $testValue);
}
}