Network Programming

ORDER BY keyword ORDER BY keyword used to sort the data in the record set. Syntax SELECT column_name (s) FROM table_name ORDER BY column_name Note: SQL insensitive case. ORDER BY and order by equivalent. Example The following example selects all the data stored in the "Person" table, and according to "Age & ...

MSSQL SQL string Interception instance code about string interception we use the SUBSTRING function substring (expression, start, length) to return characters, binary, Text&

The date / time function allows you to extract and format the date and time on the server The mktime () function returns a unix time stamp of the date. The parameter always represents the gmt date, so is_dst has no effect on the result. Arguments can be left blank from right to left, and empty parameters set to the corresponding current gmt value. Syntax mktime (hour, minute, second, month, day, y ...

php tutorial to detect the length of the array function sizeof count in php detection array length function sizeof count Now see a simple example * / $ colorlist = array ("apple" => "red", "grass" => "green", " sky "=>" bl ...

Today in the project encountered a textarea wrap problem, debugging for a long time have not been resolved. To textarea in the carriage return line into br into the database. Here is my solution to this problem, the final count is completely understood, it is almost capsize in capsize 1. Must know that the textarea in the newline is n (personal test found by the Enter key is n, as if under linux rn ) 2. Before using nl2br, carefully read the manual carefully, I was depressing, generally understood as the n into a ...

php tutorials search csv form there is no specified data // search cessory csv data principle is to open the csv file, and then search for the specified line by line contains whether we read the code, if it is true. // Search for the contents of csv $ fh = @fopen ("csv_file_name", "r"); if ($ fh) {if (flock ($ fh, lock_ex) ...

To select the data that matches the specified criteria, add the WHERE clause to the SELECT statement. WHERE clause To select the data that match the specified criteria, add a WHERE clause to the SELECT statement. Syntax SELECT column FROM table WHERE column operator value The following operators can be used with the WHERE clause: Operator Description = Equal! = Not equal> Greater than <...

1.SELECT statement Select data from database Select ' column name ' from ' Table name ' select List_name from table_name ' table name ' Selection ' column name ' data SQL SELECT * FROM table_name ' table name ' Selection all data 2.SELECT plus WHERE statement SELECT ' column name ' from ' Table name ' WHERE ' condition ' 3.SELECT plus ...

Can customize what kind of string and how long [PHP] Code function random ($ length) {$ hash = ''; $ chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz'; $ max = strlen ($ chars) - 1; mt_s ...

Three PHP tutorial Chinese verification code generation and transfer method Generate Chinese verification code in PHP must be generated and generated verification verification code is not the same operation, because gd function only accepts utf8 format encoded text, so use php to generate Chinese verification Before the first code to be encoded conversion, operation iconph icon can be an instance of PHP. * / $ ch_str = "Chinese characters you want to generate Chinese characters"; $ str = array (); for ($ i = 0; $ i <strlen ($ ch_s ...

This tutorial is a use php regular expressions to filter non-site link instance. * / php $ neirong = preg_replace ("/ <a (?! [^ <>] *? [^ <>] *?>). *? </a> / si", "", $ bbb); echo $ neirong; Method two $ str = '& ...

php tutorial to get all the files in the directory and all the directories saved to the array program This is a use of the glob function to the specified directory of all the files and folders saved to the data and then we foreach and then judge the preservation of the relevant data inside Oh. $ dirs = array (); foreach (glob ("./*") as $ d) {$ tmp = explode ('....

mysql tutorial Forget the root password correct solution is introduced Mysql forget root password correct solution, we all know that in actual operation forget the password is a very troublesome thing, the following is the correct solution to this problem is given Programs, hope you will be rewarded after browsing. mysql forget the root password solution: Under the windows: open the command line window, stop the mysql service: net stop mysql start mysql, generally to my ...

This chapter explains the SELECT and select * Statements and the Select DISTINCT statements. This chapter explains the SELECT and select * Statements. The SQL SELECT statement SELECT statement is used to select data from a table. The result is stored in a result table (called a result set). SQL SELECT syntax Select column name from table name and: SELECT * FROM table name Comment: SQL statement for case ...

php tutorial Regularly specify the string content Preg_match function description Although the code is small, but the code is as follows: preg_match ('/ ^ (?! string) /', 'aa') === true This is used to verify a Whether a string begins with a 'string' or not, in a perl or perl-supported regular expression language such as php, can be done with a look-ahead declaration, as the regular expression is: preg_mat. ..

Single quote within the variable does not execute double quotes will be executed, such as $ name = 'hello'; Echo "the $ name"; Will output the hello And if the single quotation marks $ name = 'hello'; echo 'the $ name' The main difference that will output the $ name is this.

Php tutorial Chinese characters match the regular expression Chinese characters match the regular expression: [u4e00-u9fa5] Commentary: Matching Chinese is really a headache, with this expression is easy to match the double-byte characters (including Chinese characters ): [^ X00-xff] Comment: Can be used to calculate the length of the string (a double-byte character length meter 2, ascii character meter 1) * / $ str = "singlepoint single point log"; if (preg_matc ...

fread (resource $ handle, int $ length) The length of the byte read by fread () is handled by the file pointer of the reference. Read as soon as possible to one of the following conditions: The length of the bytes that have been read! Eof (end of file) Reaches a packet of available network (stream) has been read 8192 bytes (open user space stream) * / // fread read File instance one ...

Several mysql tutorial garbled problem handling methods 1 set php tutorial myadmin language: chinese simplified (zh-utf-8) mysql character set: utf-8 unicode (utf8) mysql connection proofing: gbk_chinese_ci 2 to create a database tutorial set to gbk_chinese_ci 3 Sql build table engine = myisa ...

About SQL multiple table joint Query method A lot of, we are today to talk about SQL multiple table query usage and instance code, generally use the SELECT * FROM (SELECT) union to operate. Select Type, sum (total amount) from (select Commodity name, quantity, date, type, total amount from out of library table where date > ' 2010-5-5 Unlimited ' union se ...)