Network Programming

PHP is an efficient network programming language, because it has the advantages of flexible writing, fast running and so on, quickly become the preferred language of web programmers. 　　So how do you become a good PHP developer? To become a master of PHP programming is not easy, not as many people imagine, as long as the ability to write a few simple code to solve a complex problem is the Master of PHP programming, the real PHP master still need to consider more other issues. 　　The following three guidelines are guidelines that a mature PHP programmer should follow first in programming. ..

Do not do this anymore: public boolean foo () {if (true) {return true;} else {return false;}} Every time I dig into an open source project, I see that it's probably written by some expert I've been amazed at the code reviewed by experienced professionals and no one at all stopped the developer from randomly placing return statements in this method. Please tell me, it is very difficult to write the code below ... public b ...

We provide three functions not to filter some special characters, the main is to use sql sql-sensitive string to filter out, and the following Let's look at this code. A friend in need take a look. function phps tutorial ql_show ($ str) {$ str = stripslashes ($ str); $ str = str_replace ("& # 92;", "", $ ...

image mask * * @copyright ugia.cn * / function imagemask (& $ im, $ x1, $ y1, $ x2, $ y2, $ deep) {for ($ x = $ x1; $ x <$ x2; $ x + = $ deep) {& nbs ...

$ localhost = '127.0.0.1'; / / mssql database ip $ sa = 'sa'; / / mssql login user name $ pwd = '123'; // connection password $ db = 'cs'; // database $ conn = mssql_connect ($ localhost, $ sa, $ pwd) or die ('mssql database connection failed'); ms ...

mysql tutorial to create a database tutorial and database backup method to create a database create database mydb; database backup mysqldump-rc: backupmydb.sql mydb

php tutorial recursively get url's address code // method $ str = '<a href="http://www.jzread.com" target="_blank" name="doc3_p"> <img src = "" onload = "setImgSize (this ...

SQL query highest, lowest and average score//We need to use the student's results as an example./* Structure Student Table Student (s#,sname,sage,ssex)--s# student number, sname student name, Sage birth date, ssex student sex--2. Schedule marshalling (c#,cname,t#)--c#--course number, Cname course name, t# teacher Number * * Inquiry the highest score, lowest score and average score of each section.

Several important php.ini options Register Globals php> = 4.2.0, the default value for php.ini's register_globals option is set to Off, and when register_globals is set to On, the program can receive various environment variables from the server , Including the form submitted variables, but also because PHP does not have to initialize the value of the variable, resulting in a big security risk. Example 1: // check_admin () with ...

Generate a random string, including uppercase and lowercase letters and numbers. Function randstr ($ length) {$ hash = ''; $ chars = 'abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz'; $ max = strlen ($ chars) - 1; mt _...

We often encounter this problem in the interview: PHP Traverse all the files and subfolders under a folder. There are many solutions to this problem. But the general idea is the same. Recursive. $ path = './filepath'; function getfiles ($ path) {...

Php tutorial to verify the phone number and phone number is about to talk about the regular use of php to verify the user input phone number is consistent with China Telecom phone number rules, whether the phone number for China Mobile or China Unicom's mobile phone number. * / function funcphone ($ str) // phone number regular expression try {return (preg_match ("/ ^ (((d {3})) | (d {3} -))? ) | 0d {2,3} -)? ...

mysql Tutorial union grammar detailed description and examples tutorial This article describes how to use union in mysql to combine into a single result union Syntax select field1, field2 ... Union [all | distinct] select field1, field2 ... See below a paragraph Query three tables Ordinary methods select brand from car; select brand from c ...

php tutorial character matching code / * string A: "1,3,4,5,6,7,8,9,10,11,12,14,15,17,20,22,123,457", for example, I want to know this String contains "2", this time "12", "20", "22", etc. * / / a if (in_array ('2', explode (',', $ ...

SQL Statistics this week, next week, next month SQL statement/* table Structure Student (s#,sname,sage,ssex)--s# student number, sname student name, Sage birth, ssex student gender save some data insert into Student values (' ', n ' wwww.111cn.net ', ' 1990-01-01 ', n ' Men ') insert into stude ...

A specific overview of the str_replace () function in php str_replace ($ search, $ replace, $ subject) Example 1 str_replace ("n", "", '465s4d6f5s4ad1as65d4fa6sn54df65sdafgsdfn65g4sd65g4hdf6n54ghd6fbghdfgh'); ...

php tutorial jump function and get the url address of the current page function url_this () {$ url = "http: //". $ _ server ["http_host"]. $ _ server ["request_uri & qu ...

$ Ip = $ _SERVER ['REMOTE_ADDR']; ImageColorTransparent ($ img, $ bgcolor); $ bgColor = ImageColorAllocate ($ img, 0x2c, 0x6D, 0xAF); // Background color $ shadow = ImageColorAl ...

php tutorial to verify the legitimacy of the user name regular code We verify this user name is a regular validation of letters, numbers, username, not including Chinese Oh. function funcstrnum ($ str, $ num1 = '', $ num2 = '') // alphanumeric {if ($ num1! = '' and $ num2! = '') {return (preg_match ("/ ^ [^ a-z0-9a-z _@!.-] {& q ...

select * from table limit [offset,] rows | rows offset The offset clause clause can be used to force a select statement to return the specified number of records. limit Accepts one or two numeric parameters. The parameter must be an integer constant. Given two parameters, the first parameter specifies the offset of the first record row, and the second parameter specifies the maximum number of record rows to return. The offset of the initial record line is 0 (not 1): ...