Convert/Adjust Number in a specific counting with PHP

问题

I have the number 1543, I want to make sure that I find the number closest to 1543 which is counted every 100. For eg:

1527 = 1500

1563 = 1600

12034 = 12000

12081 = 12100

I hope that you understand.

回答1:

Use the round() function with a precision value of -2,

round( $number, -2);

Codepad Viper Demo.

回答2:

you can do that by dividing the number by 100 and using the round function.

回答3:

<?php

    function foo($number, $d)
    {
        return round($number / $d) * $d;
    }

    echo foo(1527, 100) . "\n";
    echo foo(12081, 100) . "\n";

?>

来源：https://stackoverflow.com/questions/14935390/convert-adjust-number-in-a-specific-counting-with-php