Regular expression to get everything between two characters/strings

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I have been trying to use regular expression to extract data from the following strings

  1. LTE_LTE_FSD9167__P_Airport1 I want to extract the 7 digit sitecode(FSD9167) from the above string.

  2. RUR1251__S_KhooNaiWala I want to extract 7 digit sitecode(RUR1251) from above string.

For LTE_LTE case I wrote LTE_LTE_([^_;]+).* but it selects the whole string including not the required text only.

The pattern I see is three letters followed by four numbers, so:

\w{3}\d{4}

Use () to capture the pattern:

(\w{3}\d{4})

PHP:

$re = '/(\w{3}\d{4})/m';

JavaScript:

const regex = /(\w{3}\d{4})/gm;

Use https://regex101.com/ to learn the explanation.

Regular expression to get a string between two strings in Javascript , Regular expression to get a string between two strings in JavaScript However, a dot . in JavaScript regex does not match line break characters, so, what Also see How to get all possible overlapping matches for a string. Regular expression to get a string between two strings in JavaScript The most complete solution that will work in the vast majority of cases is using a capturing group with a lazy dot matching pattern.

You can use something like this:

^(?:LTE_LTE_)?(\S{7})\S*$ /gm

This captures the seven non-whitespace characters either at the beginning (case 2) or just after LTE_LTE_

Demo

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You did not provide any rule about how the code could look like. I noticed that both codes you provided in the example have 3 letters followed by 4 digits. I made a rule more generic, with at least 2 letters followed by at least 3 digits.

The regex is:

[a-zA-Z]{2,}\d{3,}

Test here.

Extract String Between Two STRINGS, Use this regex: period_1_(.*)\.ssa. For example, in Perl you would extract it like this: my ($substr) = ($string =~ /period_1_(.*)\.ssa/);. For Python, use this code: In you're case there is something between ^ and string1/$ and string2, and regex expects that string1 will be first, and it finds some_string_and_ instead. string1.*string2 should be enough.

As you want to match only these 2 strings, use:

(?<![A-Z0-9])[A-Z0-9]{7}(?![A-Z0-9])

Explanation:

(?<![A-Z0-9])       # negative lookbehind, make sure we haven't alphanum before
[A-Z0-9]{7}         # 7 alphanumerics
(?![A-Z0-9])        # negative lookahead, make sure we haven't alphanum after

Demo

RegEx to return string between 2 specific characters?, How can I get this to work in all cases? Help With Regex Please Regular Expression to find a string included between two characters while EXCLUDING the  Regex to capture everything before specific string, then gradually I have the following string: A. if specific_condition then specific_function This is the longest variation of the string and it could also occur in the following ways: B. if specific_function then C. if specific_function specific_condition is analogo

Get text between two regex, Getting text from string between two characters · Build · regex · erva July 16 “​Some text [ between brackets ] is all we want” to this: “[ between System.Text.​RegularExpressions.Regex.Match(text, pattern).Value. Additionally  possible duplicate of Regular Expression to find a string included between two characters, while EXCLUDING the delimiters – Ro Yo Mi Jul 22 '13 at 4:27. you can use go-oleg's solution below, slightly modified to test for the dollar sign: var regExp = /\ (\$ ( [^)]+)\)/; – Dom Day Jul 22 '13 at 4:44. add a comment.

Getting text from string between two characters - Build, First of all, let's take a look at two special symbols: '^' and '$'. You can see that if you don't use either of these two characters, you're saying that the matches a string with a character that is not a letter between two percent signs). itself in PHP3 strings, so, for instance, the regular expression "(\$|A)[0-9]+" would have the  Regular Expression to . Character classes. any character except newline \w \d \s: word, digit, whitespace

Simple RegEx Tutorial, Regular Expression to find a string included between two characters while EXCLUDING the delimiters. regex.md. Source: StackOverflow. Question: Regular​  Character classes. any character except newline \w \d \s: word, digit, whitespace \W \D \S: not word, digit, whitespace [abc] any of a, b, or c [^abc] not a, b, or c [a-g] character between a & g: Anchors ^abc$ start / end of the string \b: word boundary: Escaped characters \. \* \\ escaped special characters \t \r: tab, linefeed, carriage

Comments
  • Good to know. What is your question?
  • Two examples aren't enough to go on. What are the exact rules to determine what is a sitecode and what isn't? For example "Any string of 7 characters in the range A-Z and 0-9, surrounded by either _ or the start/end of the string" or something like that ("three uppercase letters followed by four digits" etc.)
  • Help in creating Regular expression to extract the 7 digit sitecodes from the strings mentioned in the question.
  • I will only get the above two strings one starting with LTE_LTE(LTE_LTE_FSD9167__P_Airport1) and other starting with the 7 character code(RUR1251__S_KhooNaiWala). In first case I want to extract 7 characters after (LTE_LTE) i.e. FSD9167 and in second case first 7 characters (i.e RUR1251) @TimPietzcker
  • You'll have to show us what you've tried to achieve the same. SO is not a regex-writing service.
  • Serial downvoter in action. All answers have been downvoted at same time!