Number conver e.g 1.5k (k being thousand) to 1500

[Banjo]

Hi,

Basically I am trying to large string numbers to a integer. Not really sure how to explain so I'll give a few examples:


So if I had an input number 1.5k (k being thousand) it would become 1500

or if I had

0.5m that would become 500000


This is the code I currently have which works:

$numbers = array( '500000', '500k', '0.5m', '0.0005b' );

foreach( $numbers as $n ) 
{
    $result = (in_array(substr ($n, -1), array('k', 'm', 'b')) ? substr ($n, -1) : null);
    
    if($result !== null)
    {
        // Get the number.
        $num = substr($n,0,-1);
        
        if($result == 'k'){            // Thousand
            $times = 1000;
        }
        elseif($result == 'm'){        // Million
            $times = 1000000;    
        }
        elseif($result == 'b'){
            $times = 1000000000;    // Billion
        }
        
        $n = $num * $times;
    }
    
    var_dump($n);
} 

I'm just wondering if there is a better way to do this, maybe using regex? If possible I'd also like to remove all characters from the string that aren't K,M,B . or , to stop anything like 10k00k being input that would confuse the code.

Any help is appreciated, thank you.