Documentation > Regular Expressions > Alternative |
Alternative |
Alternative matches one of the specified patterns, which are separated by |.
(http|ftp):// |
http:// or ftp:// |
table|tr|td |
table, tr, or td |
(https?|ftp):// |
http://, https://, or ftp:// |
You often have to use the parentheses for grouping, as shown in the first example. Without parentheses, this example will be interpreted as “http or ftp://”.