如何区分日期格式为dd / mm / yy或dd / mm / yyyy？

Question

I'm trying to access the format of a given date value. I need to check whether the format is in dd/mm/yy or dd/mm/yyyy. I have used the following patterns with preg_match(), but they do not work.

'^\d{1,2}\/\d{1,2}\/\d{4}^'  //  dd/mm/yyyy

'^\d{1,2}\/\d{1,2}\/\d{2}^'  //  dd/mm/yy

Can someone help me to find the correct pattern?

Answer 1

Problems:

1. This $ should be in end instead of ^. $ is for end of string.

2. Don't forget delimiters /.

Regular expression:

/^\d{1,2}\/\d{1,2}\/\d{4}$/ for strings like 10/10/1111

/^\d{1,2}\/\d{1,2}\/\d{2}$/ for strings like 10/10/11

Try this code snippet here