How to convert string operation into a number?

Question

I have a '1/2' and i need to get a value 0.5 from it. '1/2' ，我需要从中获得一个值0.5 。

Other examples: Operation: $operation = '5/8'; Wanted value: $value = 0.625;

Answer 1

You can use eval , also please note your are not looking for an int as they are whole numbers.

<?php

$operation = '1/2';

eval('$value = ' . $operation . ';');

echo $value;

?>

Answer 2

This will work if you only have one "/".

$str = '2/5';
$newStr = explode('/', $str);
echo $newStr[0]/$newStr[1];

Answer 3

Edited. Not elegant because eval is used, but working.

$operation = '1/2';

function stringCalc($operation){

    return eval('return '.$operation.';');
}

$value = stringCalc($operation);