alphabetic character

Function Ctype_alnum--Check for alphanumeric character (s) Detect if it contains only [a-za-z0-9] Ctype_alpha--Check for alphabetic character (s) Detect if it contains only [a-za-z] Ctype_cntrl--Check for control character (s) Check whether it is a

To better create interactive Web applications, to enhance application security (for example, to prevent scripting intrusions, etc.), developers should provide validation capabilities for the parts of the user input. In the past, the input validation

Regular character Description \ Marks the next character as a special character, or a literal character, or a backward reference, or a octal escape character. For example, ' n ' matches the character ' n '. ' \ n '

Web In the previous sections, the ASP's approach to accessing a customer request and generating responses is described in this chapter, which discusses the other two objects of ASP. is the application and the Session object. These two objects are

This article analyzes the usage of CType function in PHP. Share to everyone for your reference. The specific analysis is as follows: The CType function is a php CType extension function that provides a set of functions to verify that the characters