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phpregexpreg-match-alltext-extractiondelimited

Get all integers which follow certain symbols in a string with multiple delimiters

I have a string that I need to match, which can be in various formats:

  • 5=33
  • 5=14,21
  • 5=34,76,5
  • 5=12,97|4=2
  • 5=35,22|4=31,53,71
  • 5=98,32|7=21,3|8=44,11

I need the numbers that appear between the equal sign (=) and pipe (|) symbol, or to the end of the line. So in the last example I need 98,32,21,3,44,11 but I can't figure this out at all. The numbers are not concrete, they can be any quantity of numbers.

Solution

  • Description

    This expression will:

    • match only numbers
    • requires the numbers to have a comma, vertial pipe, or end of string directly after the number, this prevents the numbers with an equals sign from being included.

    \d+(?=[,|\n\r]|\Z) Live Demo

    enter image description here

    NODE                     EXPLANATION
--------------------------------------------------------------------------------
  \d+                      digits (0-9) (1 or more times (matching
                           the most amount possible))
--------------------------------------------------------------------------------
  (?=                      look ahead to see if there is:
--------------------------------------------------------------------------------
    [,|\n\r]                 any character of: ',', '|', '\n'
                             (newline), '\r' (carriage return)
--------------------------------------------------------------------------------
   |                        OR
--------------------------------------------------------------------------------
    \Z                       before an optional \n, and the end of
                             the string
--------------------------------------------------------------------------------
  )                        end of look-ahead

    Examples

    Samples

    With this expression the string 5=98,32|7=21,3|8=44,11 will return an array of strings:

    [0] => 98
[1] => 32
[2] => 21
[3] => 3
[4] => 44
[5] => 11


    Or

    You could just look for all numbers which are not followed by an equals sign

    \d+(?!=|\d) Live Demo

    enter image description here