This takes anything from start of the line to end of the line if it is Alphanumeric (alphabet or numbers).
^ - Indicates start of the line.
$ - End of the line.
a-zA-Z - Alphabets irrespective of the case.
0-9 - Numbers
This takes anything from start of the line to end of the line if it is Alphanumeric (alphabet or numbers).
^ - Indicates start of the line.
$ - End of the line.
a-zA-Z - Alphabets irrespective of the case.
0-9 - Numbers