Regex any letter number or symbol
Regular expression starting and ending with a letter, accepting only letters, numbers and Ask Question 16. 5. I'm trying to write a regular expression which specifies that text should start with a letter, every character should be a letter, number or underscore, there should not be 2 underscores in a row and it should end with a letter orQuoting the PHP manual: A word character is any letter or digit or the underscore character, that is, any character which can be part of a Perl word . The definition of letters and digits is controlled by PCRE's character tables, and may vary if localespecific matching is taking place. regex any letter number or symbol
Character Classes in Regular Expressions. ; 33 minutes to read Contributors. all; In this article. A character class defines a set of characters, any one of which can occur in an input string for a match to succeed. The regular expression language in. NET supports the following character classes: Positive character groups.