HomeRegular Expression Tester
What are Regular Expression?
Regular expressions are a series of special characters that looks like your cat has walked over your keyboard.
For example /\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/
What the above does is match email adresses from a given string (block of text) using a set pattern.
Regular Expressions can be difficult to learn but it's worth the effort. Using regular expressions can save you loads of time if you need to do a lot of text manipulation.
Use the above form to test your regular expressions. Either enter your own into the space provided or select a pre defined one from the list. Enter the thect you want to search into the textarea and click on the TestExpression button.
Some Special Characters and their meaning| ^ | Start of a line |
| $ | End of a line |
| . | Any character except for newline character (if used without parameter " /.../s") |
| [ ... ] |
Match any characters between the [] |
| [^ ... ] | Doesn't Match any of the characters between the [] |
| \# |
Escape spaecial characters to use as literal for example, $ is a special character if you want to match a $ in your text escape it with a backslash \$ |
| \b | Word boundary -
|
| \B | Non word Boundary -
|
| \n | Match linefeed or new line character |
| \r | Match Carriage Return |
| \t | Match Tabs |
| \s | A whitespace character (tab/space /cr/lf) |
| \S | Not a whitespace character |
| \w | Match a word character - letters digits and underscore |
| \W | A non-word character - including spaces |
| \d | A digit |
| \D | Not a digit |
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