How can I format the number for only showing 1 decimal place in php?

Does any one know how can I form开发者_Go百科at the number and limited it to only show 1 decimal place in php?

Example:

How can I format the number 2.10 to 2.1 in php?

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Use PHP's number_format

http://php.net/manual/en/function.number-format.php

Example:

$one_decimal_place = number_format(2.10, 1);

If you ever need to convert it back to a float:

$the_float_value = floatval($one_decimal_place);

Also, this article is a good reference for different decimal characters and separator styles.

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You use the round function

echo round(3.4445, 1); // 3.4

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Number format will do this for you.

$num = 2.10;
number_format($num, 1);

PHP: number_format

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you can use round() with a precision of 1, but note that some people see longer than expected result. You can also use printf() or sprintf() with a format of "%.1f"

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Use the PHP native function bcdiv

echo bcdiv(5.98735, 1, 1);  // 5.9
echo bcdiv(5.98735, 1, 2);  // 5.98
echo bcdiv(5.98735, 1, 3);  // 5.987
echo bcdiv(-5.98735, 1, 1); // -5.9
echo bcdiv(-5.98735, 1, 2); // -5.98
echo bcdiv(-5.98735, 1, 3); // -5.987

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Use number_format function. number_format("2.10", 1) will simply do that. Here is the documentation.