php - Filter a version number out of a string -


i want filter number out of string php preg_match (they versions of software):

  • 1.6.2
  • 1.6.2#2
  • 1.7

(1.6.2#2 2. beta of 1.6.2)

so when there string like:

lorem ipsum dolor sit amet, consetetur sadipscing elitr, 1.6.2# sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.

now want string contains "1.6.2#2"

i tried (\d?[.|#]?)* not work

use regular expression

/(\d+\.\d+(\.\d+)?(#\d+)?)/

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