Regular Expression Tester
RegJex is an online regular expression tester that uses PHP's preg_match function.
| Metacharacters | |
|---|---|
| Character | Meaning |
| ^ | Indicates the start of a string |
| $ | Indicates the end of a string |
| . | Any one character |
| | | Alternative |
| \ | Escape the succeeding character |
| () | Make group |
| [] | Define class |
| Quantifiers | |
|---|---|
| Character | Meaning |
| ? | 0 or 1 |
| * | 0 or more |
| + | 1 or more |
| {x} | Exactly x occurrences |
| {x, y} | Between x and y (inclusive) |
| {x,} | At least x occurrences |