How to output decimal numbers in PHP?

I’m trying to pull two numbers from a variable($text) and then multiply them and output the results. The two numbers can be ints and floats.

When I try: $text = “1 photograph – b&w – 2 x 5 in.”
I get: The image area is 10
Which is what I want

<?php
$text = "1 photograph - b&w - 2 x 5.5 in.";


  if (preg_match("/[[:digit:]]* x [[:digit:]]* /",  $text, $match)) :
   print_r($match);

    $dimensions = trim($match[0]);
    $dimensions = explode(" x ",$dimensions);
    $image_area = (($dimensions[0]) * ($dimensions[1]));



    echo 'The image area is '.($image_area);


  endif;
 ?>

But when I try: $text = “1 photograph – b&w – 2 x 5.5 in.”
I get a blank screen

How would I output floats?


my code and output:http://sandbox.onlinephpfunctions.com/code/4b45219fdcb7864442268459621bb506c24ce78f

Answer

You have an extra space at the end of the regex, which would break it. Remove it, and it would match 2 x 5. You should be able to extend it further by adding . to each side of the regex:

if (preg_match("/[[:digit:].]* x [[:digit:].]*/",  $text, $match)) {