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bcround

(PHP 8 >= 8.4.0)

bcround — Round arbitrary precision number

Açıklama

bcround(string $num, int $precision = 0, RoundingMode $mode = RoundingMode::HalfAwayFromZero): string

Returns the rounded value of num to specified precision (number of digits after the decimal point). precision can also be negative or zero (default).

Bağımsız Değişkenler

num

The value to round.

precision

The optional number of decimal digits to round to.

If the precision is positive, num is rounded to precision significant digits after the decimal point.

If the precision is negative, num is rounded to precision significant digits before the decimal point, i.e. to the nearest multiple of pow(10, -$precision), e.g. for a precision of -1 num is rounded to tens, for a precision of -2 to hundreds, etc.

mode
Specifies the rounding mode. For more information about modes, see RoundingMode.

Dönen Değerler

Returns a numeric string representing num rounded to the given precision.

Hatalar/İstisnalar

This function throws a ValueError in the following cases:

Örnekler

Örnek 1 bcround() examples

<?php
var_dump(bcround('3.4'));
var_dump(bcround('3.5'));
var_dump(bcround('3.6'));
var_dump(bcround('3.6', 0));
var_dump(bcround('5.045', 2));
var_dump(bcround('5.055', 2));
var_dump(bcround('345', -2));
var_dump(bcround('345', -3));
var_dump(bcround('678', -2));
var_dump(bcround('678', -3));
?>

Yukarıdaki örneğin çıktısı:

string(1) "3"
string(1) "4"
string(1) "4"
string(1) "4"
string(4) "5.05"
string(4) "5.06"
string(3) "300"
string(1) "0"
string(3) "700"
string(4) "1000"

Örnek 2 Example of using bcround() with different precision values

<?php
$number = '123.45';

var_dump(bcround($number, 3));
var_dump(bcround($number, 2));
var_dump(bcround($number, 1));
var_dump(bcround($number, 0));
var_dump(bcround($number, -1));
var_dump(bcround($number, -2));
var_dump(bcround($number, -3));
?>

Yukarıdaki örneğin çıktısı:

string(7) "123.450"
string(6) "123.45"
string(5) "123.5"
string(3) "123"
string(3) "120"
string(3) "100"
string(1) "0"

Örnek 3 Example of using bcround() with different mode values

<?php
echo 'Rounding modes with 9.5' . PHP_EOL;
var_dump(bcround('9.5', 0, RoundingMode::HalfAwayFromZero));
var_dump(bcround('9.5', 0, RoundingMode::HalfTowardsZero));
var_dump(bcround('9.5', 0, RoundingMode::HalfEven));
var_dump(bcround('9.5', 0, RoundingMode::HalfOdd));
var_dump(bcround('9.5', 0, RoundingMode::TowardsZero));
var_dump(bcround('9.5', 0, RoundingMode::AwayFromZero));
var_dump(bcround('9.5', 0, RoundingMode::NegativeInfinity));
var_dump(bcround('9.5', 0, RoundingMode::PositiveInfinity));

echo PHP_EOL;
echo 'Rounding modes with 8.5' . PHP_EOL;
var_dump(bcround('8.5', 0, RoundingMode::HalfAwayFromZero));
var_dump(bcround('8.5', 0, RoundingMode::HalfTowardsZero));
var_dump(bcround('8.5', 0, RoundingMode::HalfEven));
var_dump(bcround('8.5', 0, RoundingMode::HalfOdd));
var_dump(bcround('8.5', 0, RoundingMode::TowardsZero));
var_dump(bcround('8.5', 0, RoundingMode::AwayFromZero));
var_dump(bcround('8.5', 0, RoundingMode::NegativeInfinity));
var_dump(bcround('8.5', 0, RoundingMode::PositiveInfinity));
?>

Yukarıdaki örneğin çıktısı:

Rounding modes with 9.5
string(2) "10"
string(1) "9"
string(2) "10"
string(1) "9"
string(1) "9"
string(2) "10"
string(1) "9"
string(2) "10"

Rounding modes with 8.5
string(1) "9"
string(1) "8"
string(1) "8"
string(1) "9"
string(1) "8"
string(1) "9"
string(1) "8"
string(1) "9"

Örnek 4 Example of using bcround() with different mode values when specifying precision

<?php
echo 'Using RoundingMode::HalfAwayFromZero with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::HalfAwayFromZero));
var_dump(bcround(-1.55, 1, RoundingMode::HalfAwayFromZero));

echo PHP_EOL;
echo 'Using RoundingMode::HalfTowardsZero with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::HalfTowardsZero));
var_dump(bcround(-1.55, 1, RoundingMode::HalfTowardsZero));

echo PHP_EOL;
echo 'Using RoundingMode::HalfEven with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::HalfEven));
var_dump(bcround(-1.55, 1, RoundingMode::HalfEven));

echo PHP_EOL;
echo 'Using RoundingMode::HalfOdd with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::HalfOdd));
var_dump(bcround(-1.55, 1, RoundingMode::HalfOdd));

echo PHP_EOL;
echo 'Using RoundingMode::TowardsZero with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::TowardsZero));
var_dump(bcround(-1.55, 1, RoundingMode::TowardsZero));

echo PHP_EOL;
echo 'Using RoundingMode::AwayFromZero with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::AwayFromZero));
var_dump(bcround(-1.55, 1, RoundingMode::AwayFromZero));

echo PHP_EOL;
echo 'Using RoundingMode::NegativeInfinity with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::NegativeInfinity));
var_dump(bcround(-1.55, 1, RoundingMode::NegativeInfinity));

echo PHP_EOL;
echo 'Using RoundingMode::PositiveInfinity with 1 decimal digit precision' . PHP_EOL;
var_dump(bcround( 1.55, 1, RoundingMode::PositiveInfinity));
var_dump(bcround(-1.55, 1, RoundingMode::PositiveInfinity));
?>

Yukarıdaki örneğin çıktısı:

Using RoundingMode::HalfAwayFromZero with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.6"

Using RoundingMode::HalfTowardsZero with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.5"

Using RoundingMode::HalfEven with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.6"

Using RoundingMode::HalfOdd with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.5"

Using RoundingMode::TowardsZero with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.5"

Using RoundingMode::AwayFromZero with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.6"

Using RoundingMode::NegativeInfinity with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.6"

Using RoundingMode::PositiveInfinity with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.5"

Ayrıca Bakınız