regular expression az

// Check whether it is composed of digits[Code] function isDigit (s) {var patrn =/^ [0-9] {1, 20} $/; if(! Patrn.exe c (s) return false return true} [/code] // Check Logon Name: You can enter only 5-20 strings starting with a letter, which can

PHP regular expression syntax reprinted from: http://blog.csdn.net/kkobebryant/article/details/267527 Basic regular expression syntax First, let's take a look at two special characters: '^' and '$'. they are used to match the start and end of the

Reprinted from: http://blog.csdn.net/kkobebryant/article/details/267527 Basic syntax for regular expressions First, let's take a look at two special characters: ' ^ ' and ' $ ' they are used to match the beginning and end of the string,

: This article mainly introduces the PHP regular expression syntax summary. if you are interested in the PHP Tutorial, you can refer to it. Http://bbs.chinaunix.net/forum.php? Mod = viewthread & tid = 4101636. Use well Regular expressionPHP is often

Objective PHP is a large number of web-used background CGI development, usually after the user data data to produce some results, but if the user input data is incorrect, there will be problems, such as someone's birthday is "February 30!" How

Ask for the meaning of various regular expression suffixes About the meaning of the expression suffix in PHP, now I am smattering, just know/u table non-greedy match,/I means ignoring case,/s can let "." Match to line break. But do not know what the

Basic knowledge CharacterPOSIX Extended Regular Expression functionsPerl-compatible Regular expression functionsFrom the message verification. The format of the message: Tenssun@163.com Where Tenssun is the user name, 163.com is the server name

The basic syntax of php regular expressions is summarized in detail. First, let's take a look at two special characters: & amp; rsquo; ^ & amp; rsquo; and & amp; lsquo; $ & amp; rsquo; they are used to match The start and end of The string

Regular Expression SyntaxIn a typical search and replace operation, you must provide the exact text you want to find. This technique may suffice for simple search and replace tasks in static text, but because of its lack of flexibility, it can be

First, Let's take a look at two special characters: ' ^ ' and ' $ ' they are used to match the start and end of the string, respectively, to illustrate "^the": matches a string that starts with "the";"Of despair$": matches a string ending with "of