PHP

You know how to build a file. You know how to open a file in a variety of different ways. You don't even know how to read and write data from a file!Now is the time to learn how to destroy (delete) files. Files deleted in PHP are interrupted by

Connecting to a database$link _id = mysql_connect ("localhost", "root", "") or Die ("Connection failed");if ($link _id){Select Databasemysql_select_db ("My_test");The above is the header database Connection section, which is the following common

if ($_post[ok]){$link _id = mysql_connect ("localhost", "root", "") or Die ("Connection failed");if ($link _id){Select Databasemysql_select_db ("My_test");Insert Data SQL statement$sql = "INSERT into userinfo values ('. $_post[id]." ', ' ".

Login.htm The code is as follows:Copy code Untitled Document Login. php The code is as follows:Copy code Function showPage () // determine whether to log on without logon. Directly jump to the logon page.{If (! Isset ($ _ SESSION ["user"

Create a data table The code is as follows:Copy code Create table 'message '('Id' tinyint (1) not null auto_increment,'User' varchar (25) not null,'Title' varchar (50) not null,'Content' tinytext not null,'Lastdate' date not null,Primary key

It's a very simple php Tutorial, and it's also an entry-level thing, so I won't talk much about it.Code The code is as follows:Copy code // Description: Solution for deleting non-empty directoriesFunction removeDir ($ dirName){ If (! Is_dir ($

 Write cookie The code is as follows:Copy code Setcookie (name, value, expire, path, domain );Function w_cookie ($ n, $ c, $ e = 0, $ isdes = 1) {If ($ isdes = 1) {$ c = endes ($ c, Region EY );}$ Exp = time () + 3600*24*30;If ($ e = 0)    

_ METHOD _ is a new magic constant after PHP5, indicating the name of the quasi-grammar. The code is as follows:Copy code Class chhua {Function test (){Echo _ METHOD __; }} $ E = new chhua (); $ E-> test (); // output: chhua: test There are

The code is as follows:Copy code  Echo "rn First case rn ";$ A = array (1, 2, 3, 4, 5, 6 );$ B = array (7,8, 9 );  $ C = array_merge ($ a, $ B );Print_r ($ c );$ C = $ a + $ B;Print_r ($ c );$ C = $ B + $;Print_r ($ c );    Echo "rn second case

Modify the three rows as follows:1. session. use_cookiesSet this value to 1 and use cookie to pass sessionid2. session. cookie_lifetimeThis indicates the time when SessionID is stored in the client Cookie. The default value is 0, indicating that the

The code is as follows:Copy code $ ImgPath = "Image address ";// Obtain image information $ imgPath can be a remote addressList ($ srcWidth, $ srcHeight, $ type) = getimagesize ($ imgPath );...Switch ($ type ){Case 1: $ imgCreate =

The code is as follows:Copy code $ Arr1 = array ("a", "B", "c ");$ Arr2 = array ("c", "d", "e ");$ Myarray = array_merge ($ arr1, $ arr2 );Print_r ($ myarray );$ Myarray = array_unique ($ myarray );Print_r ($ myarray );?> Example The code is as

Display_errorsError Echo, which is commonly used in development mode. However, many applications forget to disable this option in the formal environment. Error Echo can expose a large amount of sensitive information to facilitate the next attack.

Function name restrictionsDbmopen () checks whether the operated file or directory has the same UID (owner) as the script being executed ).Dbase_open () check whether the operated file or directory has the same UID (owner) as the script being

The file_get_contents () function is the preferred method for reading the file content into a string.In The Help Manual above, all the content is read into the memory at a time, and we will also discuss the following examples._ Get_contents can read

The code is as follows:Copy code Function show_var ($ var ){If (is_scalar ($ var )){Echo $ var;} Else {Var_dump ($ var );} } $ Pi = 3.1416;$ Proteins = array ("hemoglobin", "cytochrome c oxidase", "ferredoxin ");Show_var ($ pi );// Print

In PHP, we can use the following loop statement:WhileThe code block is executed cyclically as long as the specified condition is true.Do... whileExecute a code block first, and then repeat the loop when the specified condition is set.ForNumber of

The code is as follows:Copy code Header ('content-Type: text/html; charset = utf-8 ');Echo ' ';Function var_array ($ array){ Echo ' ';Var_dump ($ array );Echo ' ';} Function printr ($ array){ Echo ' ';Print_r ($ array );Echo ' ';} Function getArr

See the instance below The code is as follows:Copy code $ A = 1;$ B = 2;Function Sum (){Global $ a, $ B;$ B = $ a + $ B;}Sum ();Echo $ B;?> In this way, the value of $ B is 3, and global is a global variable in php. So let's look at the php

This function uses the TZ environment variable (if any) to calculate the timestamp. PHP 5.1.0 has an easier way to determine the time zone of All/dateTime functions used. This process is explained on the page of the date_default_timezone_get ()