<?php

$a = 0.58;

echo $a * 100, PHP_EOL; // 58

echo intval($a * 100), PHP_EOL; // 57

echo (int) ($a * 100), PHP_EOL; // 57

echo intval(bcmul($a, 100)), PHP_EOL; // 58

echo json_encode([

'a1' => $a, // "a1":0.58

'a2' => $a * 100, // "a2":57.99999999999999

'a3' => intval($a * 100), // "a3":57

'a4' => floatval($a * 100), // "a4":57.99999999999999

'a5' => floatval($a), // "a5":0.58

'a6' => intval(bcmul($a, 100)), // "a6":58

'a7' => 1.1 + 2.2, // "a7":3.3000000000000003

'a8' => floatval(bcadd(1.1, 2.2, 10)), // "a8":3.3

'a9' => 2 - 1.1, // "a9":0.8999999999999999

'a10' => floatval(bcsub(2, 1.1, 10)), // "a10":0.9

'a11' => floatval($a * 100 / 10), // "a11":5.799999999999999

'a12' => floatval(bcdiv($a * 100, 10, 10)), // "a12":5.8

'a13' => 10 % 2.1, // "a13":0

'a14' => bcmod(10, 2.1), // "a14":"1"

'a15' => pow(1.1, 2), // "a15":1.2100000000000002

'a16' => bcpow(1.1, 2, 30), // "a16":"1.210000000000000000000000000000"

'a17' => sqrt(1.1), // "a17":1.0488088481701516

'a18' => bcsqrt(1.1, 30), // "a18":"1.048808848170151546991453513679"

]), PHP_EOL;

echo bccomp(1, 2), PHP_EOL; // -1

echo bccomp(1.00001, 1, 3), PHP_EOL; // 0

echo bccomp(1.00001, 1, 5), PHP_EOL; // 1

bcscale(30);

echo bcmod(bcpow(5, 2), 2), PHP_EOL; // 1.000000000000000000000000000000

echo bcpowmod(5, 2, 2), PHP_EOL; // 1.000000000000000000000000000000