php - regex - how to extract a number with decimal (dot and comma) from a string (e.g. 1,120.01)?

Question

how to extract a number with decimal (dot and comma) from a string (e.g. 1,120.01) ? I have a regex but doesn\'t seem to play well with commas

preg_match(\'/([0-         


        

Answer 1

Add the comma to the range that can be in front of the dot:

/([0-9,]+\.[0-9]+)/
#     ^ Comma

And this regex:

/((?:\d,?)+\d\.[0-9]*)/

Will only match

1,067120.01
121,34,120.01

But not

,,,.01
,,1,.01
12,,,.01

# /(
#   (?:\d,?) Matches a Digit followed by a optional comma
#   +        And at least one or more of the previous
#   \d       Followed by a digit (To prevent it from matching `1234,.123`)
#   \.?      Followed by a (optional) dot
#            in case a fraction is mandatory, remove the `?` in the previous section.
#   [0-9]*   Followed by any number of digits  -->  fraction? replace the `*` with a `+`
# )/