regular expression

Nginx is a very lightweight HTTP server and a high-performance HTTP and reverse proxy server, as well as a IMAP/POP3/SMTP proxy server. 1. Support for PHP Currently, there are three kinds of Web server support for PHP: (1) Through the Web server

According to the number of dirty words/version number statistics By language density/version number statistics The above illustration shows the c,h in the Linux kernel and the bad language statistics in the s source code, which I

First talk about the implementation of the PHP program process, which explains this, just to start our optimization trip. Client (for example, browser) -"Request Get hello.php --The CGI server (for example, Apache) receives a request to find a

Urlrewriter Component Usage Instructions manual : All users have the same action : Different depending on user requirements : Problems that may occur after a user installs a component Urlrewrite Introduction What is Urlrewrite? Urlrewri Using

Here's how to judge Yyyy-mm-dd in this format, basically taking into account the leap year and February, but I've forgotten where I found it. ^ ((1[6-9]| [2-9]d) D{2})-(0?[ 13578]|1[02])-(0?[ 1-9]| [12]d|3[01]) | (((1[6-9]| [2-9]d) D{2})-(0?[ 134567

Matching regular expressions for Chinese characters: [U4E00-U9FA5] Match Double-byte characters (including Chinese characters): [^x00-xff] Application: Computes the length of the string (a double-byte character length meter 2,ascii character 1)

One, built-in variable table Property Description $ Current record (as a single variable) $1~ $n Nth field in the current record, separated by FS Fs The input field delimiter is by

This article introduced the JS Replace and ReplaceAll instance usage detailed explanation, the need friend may refer to the The Stringobj.replace (rgexp, replacetext) parameter Stringobj must be selected. The string object or string literal to

Brief introduction Awk is a powerful text analysis tool that is particularly powerful when it comes to analyzing and generating reports on data, compared to grep lookup and sed editing. To put it simply, awk reads the file line by row, using a

Prototype is a method for a class of objects introduced in IE 4 and later versions, and the special place is: it is a way to add a method to the object of the Class! This may sound a bit messy, don't worry, I will use the example to explain this

Note * XSS attack is Cross Site scripting, usually in the URL of Web page link to inject JS code to achieve the attack means, many manufacturers are in the game, such as: Twitter, Sina Weibo, sample code: http://www.demo.cn/=alert (Document.cookie)

As we all know, all the library names are stored in the INFORMATION_SCHEMA library in the MySQL 5+, indicating the field name information. So the attack mode is as follows: 1. Determine whether the first character of the first table name is a A-Z

  This article mainly introduces PHP to prevent SQL Injection Vulnerability Code and analysis, recently provided several common attacks of regular expressions, we refer to the use of the bar The injection vulnerability code and analysis code are

This article mainly introduces the perfect imitation QQ space comment reply effect, very practical, attached to the example code to everyone, the need for the reference of small partners. Comment Reply is a very common thing, but the way that each

In traditional writing business logic processing code, we usually do a few things: logging, transaction control and permission control, and then write the core business logic processing code. When the code is written and looked back, I can't help

This article mainly introduces the JS regular expression to get the specific characters in the string, through the callback function of replace to obtain, the need for friends can refer to theEffect of implementation: Gets the value of the name test

Here is an example: The code is as follows: [Chengmo@localhost ~/shell]$ ls A.txt B.txt C.old #2 [Chengmo@localhost ~/shell]$ ls *.txt A.txt B.txt #3 [Chengmo@localhost ~/shell]$ ls d*.txt LS: Unable to access d*.txt: No file or directory

This article mainly introduces the regular expression in Ruby, is the important knowledge of Ruby learning, need friends can refer to the following Regular expressions are a special sequence of characters that can help match or find other strings

To find a regular expression that validates a user nameDear eldest sister, the younger generation to seek a verification of the user name of the regular expression, hard thinking for one weeks or did not get out, I am dull, also hope everyone advice!

The Replace function method in JavaScript is to return a copy of a string that is replaced with text based on a regular expression. How to use: where stringobj is a required option. The string object or string literal to perform the substitution.