REGEX Cheat Sheet
Basic REGEX Wild Cards
REGEX
June 2024
| Character Classes | Description |
|---|---|
| [abc] | a single character of a, b or c |
| [^abc] | a character except a, b or c |
| [a-z] | a character in the range a-z |
| [^a-z] | a character not in range a-z |
| [a-zA-Z] | a character in the range of a-z or A-Z |
| Quantifiers | Description |
|---|---|
| a? | zero or one of a |
| a* | zero or more of a |
| a+ | one or more of a |
| a{3} | Exactly 3 of a |
| a{3,} | 3 or more of a |
| a{3,6} | Between 3 and 6 of a |
| a{3,6} | Between 3 and 6 of a |
| a* | Greedy Quantifier |
| a*? | Lazy Quantifier |
| Meta Sequence | Description |
|---|---|
| . | Any single character other than newline (or including line terminators with the /s flag) |
| a|b | alternate - match a or b |
| \s | Matches any space, tab or newline character |
| \S | Matches anything other than a space, tab or newline |
| \d | Matches any decimal digit. Equivalent to [0-9] |
| \D | Matches anything other than a decimal/digit |
| \w | Matches any letter, digit or underscore. Equivalent to [a-zA-Z0-9_] |
| \W | Matches anything other than a letter, digit or underscore. Equivalent to [^a-zA-Z0-9_] |
| Anchors | Description |
|---|---|
| \b | a word boundary |
| \B | non word boundary |
| ^ | start of a string |
| $ | end of a string |