使用PHP在括号内提取时间

Question

This is my first time using the trim function and I want to get the Time excluding the open and close parenthesis of my string. Can you give me hints and suggestions on how to do this?

$string = "Updated by Carewina Almonte  (04/02/2018 21:58:32)";     
echo trim($string, "Updated by Carewina Almonte  (04/02/2018");     
exit();

Answer 1

You can use preg_match for this task:

$str = 'Updated by Carewina Almonte  (04/02/2018 21:58:32)';
preg_match('/(?<=\(\d{2}\/\d{2}\/\d{4} ).*(?=\))/', $str, $match);
echo $match[0];

Breakdown:

• Positive Lookbehind (?<=\(). Assert that the Regex below matches:

  • \( matches the character ( literally (case sensitive)
  • .* matches any character (except for line terminators)
  • * Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
  • \d{2} matches a digit (equal to [0-9])
  • {2} Quantifier — Matches exactly 2 times
  • \/ matches the character / literally (case sensitive)

• Positive Lookahead (?=\)). Assert that the Regex below matches:

  • \) matches the character ) literally (case sensitive)