How to convert Meters to Foot using PHP

Question

I have used this code which shows an error:ie if my meters is 175m but when i convert it does'nt show that thing

<?php
function metersToFeetInches($meters, $echo = true)
{
    $m = $meters;
    $valInFeet = $m*3.2808399;
    $valFeet = (int)$valInFeet;
    $valInches = round(($valInFeet-$valFeet)*12);
    $data = $valFeet."&prime;".$valInches."&Prime;";
    if($echo == true)
    {
            echo $data;
    } else {
            return $data;
    }
}
?>
<?php
$feetInches = metersToFeetInches(1.75,false);
echo $feetInches;
?>

I ran your code and got `5′9″` which sounds roughly correct (5 feet, 9 inches) — pstrjds, Aug 20 '12 at 20:33
[This](http://stackoverflow.com/questions/3726721/php-math-precision) may help understand why your results are different from what you expect. — Matt, Aug 20 '12 at 20:34
I'm getting the same thing as @pstrjds... which is why you should show us your error message. :) — Phil, Aug 20 '12 at 20:36
@pstrjds 5.9 is wrong , 5.74 is correct, easy way to check the answer in google — ede, Aug 20 '12 at 20:38
@ede - I didn't get 5.9, I got 5' 9", the floating point value is 5.74..., you are taking 5.74... - 5, then multiplying by 12 which gives you `8.8976379`, you then round that. The correct rounded to nearest int value of 8.89... is 9. You are getting what you coded. — pstrjds, Aug 20 '12 at 20:45
Possible duplicate of [Is floating point math broken?](https://stackoverflow.com/questions/588004/is-floating-point-math-broken) — miken32, Nov 30 '18 at 00:06

score 4 · Accepted Answer · answered Aug 20 '12 at 20:35

This is one of those things you can easily find on Google, but I guess you didn't look further than the first link.

Anyways, you should do it like this.

<?php

function metersToFeet($meters) {
    return floatval($meters) * 3.2808399;
}

?>

But why is this better than the code you posted? Well, functions are not supposed to do everything. You should write a function for a certain action, not one big function with everything you can every need. Because if you need to add something to that function or change the order of actions, it's a hell of a lot of work.

Furthermore, your function has an option $echo. But why would you need that? You can add such an option to every function, but PHP has a nice commando for that: echo. So instead, it's way better to write echo metersToFeet(10). Or $value = metersToFeet(10) if you need to save the result in a variable.

Actually, this is the first result on Google. Your criticism is unwarranted sir. — Coded Monkey, Feb 05 '19 at 20:50

score 2 · Answer 2 · answered Jul 05 '17 at 08:02

<?php
function metersToFeetInches($meters, $echo = true)
{
    $m = $meters;
    $valInFeet = $m*3.2808399;
    $valFeet = (int)$valInFeet;
    $valInches = round(($valInFeet-$valFeet)*12);
    $data = $valFeet."&prime;".$valInches."&Prime;";
    if($echo == true)
    {
        echo $data;
    } else {
        return $data;
    }
}
?>

How to convert Meters to Foot using PHP

2 Answers2