Examples
Example #1 Examples of valid patterns
- /<\/\w+>/
- |(\d{3})-\d+|Sm
- /^(?i)php[34]/
- {^\s+(\s+)?$}
Example #2 Examples of invalid patterns
- /href='(.*)' - missing ending delimiter
- /\w+\s*\w+/J - unknown modifier 'J'
- 1-\d3-\d3-\d4| - missing starting delimiter