| g | Global match |
| i * | Case-insensitive |
| m * | Multiple lines |
| s * | Treat string as single line |
| x * | Allow comments and whitespace in pattern |
| e * | Evaluate replacement |
| U * | Ungreedy pattern |
* PCRE modifier
| g | Global match |
| i * | Case-insensitive |
| m * | Multiple lines |
| s * | Treat string as single line |
| x * | Allow comments and whitespace in pattern |
| e * | Evaluate replacement |
| U * | Ungreedy pattern |
* PCRE modifier