What is the best way to reduce a calculated number to one decimal place in PHP without rounding?

When reducing a calculated number to one decimal place in PHP without rounding, you can achieve this by using the number_format() function with the proper parameters. By setting the decimal parameter to 1 and the thousands separator and decimal point parameters to an empty string, you can effectively truncate the number to one decimal place without rounding. 

$number = 15.6789;
$reduced_number = number_format($number, 1, '.', '');
echo $reduced_number; // Output: 15.6

Keywords

PHP number formatting round decimal precision floor

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