Using PHP floatval adds undesired trailing numbers behind decimal places

Question

I am having a problem with php conversion from string to float

In some cases, if I do:

floatval("8.80")

I get:

8.800000000000001

I have struggled with round(x,1), number_format, etc, but to no avail

What am I getting wrong here?

This will help https://stackoverflow.com/questions/19875583/set-precision-for-a-float-number-in-php — Rakesh Jakhar, Nov 17 '19 at 13:19
What are you using to "print" this value? `var_export()`, `pring_r()`, `echo`, `var_dump()` something else? — mickmackusa, Nov 17 '19 at 13:19
Also worth a read: https://stackoverflow.com/q/14587290/2943403 — mickmackusa, Nov 17 '19 at 13:24
Learn about floating point numbers here: https://floating-point-gui.de/ — RoToRa, Nov 17 '19 at 14:45

score 1 · Accepted Answer · answered Nov 17 '19 at 14:43

1

By using number_format will help to resolve your issue

<?php
    $number = 8.800000000000001;
    $precision = 1;
    $number = intval($number * ($p = pow(10, $precision))) / $p;
    echo number_format((float) $number, $precision, '.', ''); 
?>

answered Nov 17 '19 at 14:43

MK Vimalan

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Using PHP floatval adds undesired trailing numbers behind decimal places

1 Answers1