\( matches the character ( literally (case sensitive)
Match a single character present in the list below [0-9]{2}
{2} Quantifier — Matches exactly 2 times
0-9 a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
\) matches the character ) literally (case sensitive)
matches the character literally (case sensitive)
9?
matches the character 9 literally (case sensitive)? Quantifier — Matches between zero and one times, as many times as possible, giving back as needed (greedy)
Match a single character present in the list below [0-9]{4}
{4} Quantifier — Matches exactly 4 times
0-9 a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
- matches the character - literally (case sensitive)
Match a single character present in the list below [0-9]{4}
{4} Quantifier — Matches exactly 4 times
0-9 a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)