Regex find anything between + sign except \+

With regex, I want to get anything between + sign avoid if + with backslash.

My string is GroupNo+ \+ +Name+ / +Ac

I want to get " \\+ " and " / " with php preg_matchall

I tried with /\+(.*?)\+/ but it takes + with slash also.

You may use this regex to match characters between + while ignoring \+:

\+([^+\\]*(?:\\\+[^+\\]*)*)\+

RegEx Demo

RegEx Details:

• \+: Match opening +
• (: Start capture group #1
  • [^+\\]*: Match 0 or more of any characters that are not + or \
  • (?:: Start non-capture group
    • \\\+: Match a \+
    • [^+\\]*: Match 0 or more of any characters that are not + or \
    • )*: End non-capture group. Repeat this group 0 or more times
• ): End capture group #1
• \+: Match closing +

Solution 2: A bit shorter but a bit slower regex would be:

\+((?:\\\+|[^+\\]+)*)\+

RegEx Demo 2

Details:

• \+: Match opening +
• (: Start capture group #1
  • (?:: Start non-capture group
    • \\\+: Match \ followed by a +
    • |: OR
    • [^+\\]+: Match 1 or more of any characters that are not + or \
  • )*: End non-capture group. Repeat this group 0 or more times.
• ): End capture group #1
• \+: Match closing +