preg match only numbers

In the use of regular expressions, I have been in the guerrilla, it is time to come up with a summary. Because of the irresistible reason of stupidity, can only choose to simply say, only write down the ASCII encoding character matching and

Demo Code Operation effect (Figure 1) Operation effect (Figure 2) Main Package function Multi_process ();According to the parameters, create the number of pointers to the child process.Bright spot Function 1: The

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

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

: 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

Preface PHP is widely used in the background CGI development of the web, usually after the user data data to obtain a certain result, but if the user input data is incorrect, there will be problems, such as someone's birthday is "February 30"! What

Use regular expressions compatible with Perl in PHP. Preface PHP is widely used in Web background CGI development. it usually produces some results after user data. However, if user input data is incorrect, problems may occur, such Preface PHP is

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,

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

Preface PHP is widely used in Web Background CGI development. It usually produces some results after user data. However, if the user input data is incorrect, a problem may occur, for example, a person's birthday is "August February 30 "! How can we