PHP floating point number float operation transfer to int problem

php Floating point number float operation transfer to integer: Floating point numbers in PHP are weak types. For integers or floating point numbers whose results are integers after operations, PHP can treat them as integers. The code is [intval(round (floatval($value) * 100))].

php floating point number float operation transfer to integer type int:

Run this code:

$f = 0.58;
var_dump(intval($f * 100.0));

Maybe you think he will output 58, but in fact he outputs 57.
The reason is that as floating point data, part of its accuracy has been lost and it cannot be completely accurate. So never trust that a floating-point number result is accurate to the last digit, and never compare two floating-point numbers for equality.

Floating point numbers in PHP are weakly typed. For integers or floating point numbers whose result after operation is an integer, PHP can treat them as integers, but the type remains unchanged. But if it is not an integer after the operation, then PHP will treat the result as a strict floating point number

In actual development, we can use the following logic to solve this situation

intval(round(floatval($value) * 100));

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