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Search and returns the first results on a regex search

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Search and returns the first results on a regex search
If we use parenthesized or subpattern, can return with $result_number

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  1. function preg_match_first($pattern,$string,$result_number=null)
  2. {
  3. 	if(is_null($result_number)) $result_number=0;
  4. 	preg_match($pattern,$string,$matches);
  5. 	return !empty($matches)?$matches[$result_number]:"";
  6. }

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