| public asScientific ( mixed $value, integer $decimals = null, array $options = [], array $textOptions = [] ) : string | ||
| $value | mixed | the value to be formatted. |
| $decimals | integer | the number of digits after the decimal point. |
| $options | array | optional configuration for the number formatter. This parameter will be merged with [[numberFormatterOptions]]. |
| $textOptions | array | optional configuration for the number formatter. This parameter will be merged with [[numberFormatterTextOptions]]. |
| Результат | string | the formatted result. |
public function asScientific($value, $decimals = null, $options = [], $textOptions = [])
{
if ($value === null) {
return $this->nullDisplay;
}
$value = $this->normalizeNumericValue($value);
if ($this->_intlLoaded) {
$f = $this->createNumberFormatter(NumberFormatter::SCIENTIFIC, $decimals, $options, $textOptions);
if (($result = $f->format($value)) === false) {
throw new InvalidParamException('Formatting scientific number value failed: ' . $f->getErrorCode() . ' ' . $f->getErrorMessage());
}
return $result;
} else {
if ($decimals !== null) {
return sprintf("%.{$decimals}E", $value);
} else {
return sprintf('%.E', $value);
}
}
} public function testAsScientific()
{
$value = '123';
$this->assertSame('1.23E2', $this->formatter->asScientific($value));
$value = '123456';
$this->assertSame("1.23456E5", $this->formatter->asScientific($value));
$value = '-123456.123';
$this->assertSame("-1.23456123E5", $this->formatter->asScientific($value));
$this->assertSame($this->formatter->nullDisplay, $this->formatter->asScientific(null));
}
