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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

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