PHP - 子串处理[关闭]

Question

I have a set of strings that are in the format of This.is.An.Example.YYYY.More.Data.Here where YYYY is any valid year and I would like to get the string up until YYYY in the example so I would end up with a string that is This.is.an.Example.

Answer 1

You can do this with a simple regex, \d{4}.

$splitted = preg_split('~\d{4}~', 'This.is.An.Example.2015.More.Data');
echo $splitted[0];

Output:

This.is.An.Example.

This will split one every 4 continuous single numbers (0-9). Since you only care about what is the first instance use the 0 index.

Sample: http://sandbox.onlinephpfunctions.com/code/640224e9bda3e6cd5c3e012a1bb901dc1e6a34b4