In Php, how to get float value from a mixed string?

Question

I got a string like:

$str = \"CASH55.35inMyPocket\";

I want to get 55.35 only.

I tried:

$str = flo         


        

Answer 1

What you have cannot be casted to a float, because it doesn't look like a float from PHP's perspective. It is possible to grab the value using regex though.

If you are not sure whether there will always be a decimal. And you are trying to get the number regardless of position in the text (as per your question). You could use:

^.*?([\d]+(?:\.[\d]+)?).*?$

Which gets the numeric values from the following strings:

CASH55.35inMyPocket
CASH55inMyPocket
55.35inMyPocket
55inMyPocket
inMyPocket55.35
inMyPocket55

Explanation: http://regex101.com/r/tM8eM0
Demo: http://rubular.com/r/Gw5HTzsejj
PHP demo: https://eval.in/165521

Basically it looks for numbers in the string. And optionally it also check for decimals after that.