I won't talk about the PHP syntax. Let's talk about connecting to mysql!
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$ Conn = @ mysql_connect ("localhost", "root", "mydown") or die ("database link error ");
Mysql_select_db ("bbs", $ conn );
Mysql_query ("set names 'gbk '"); |
The first statement describes the database connection statement. If a database connection error is prompted, the preceding three parameters indicate the database address localhost, and the database username is root, connect to the database password mydown;
The second sentence describes the database that $ conn represents when connected to the database table bbs.
The third sentence is to convert the encoding format to display Chinese characters.
After the database is connected, let's take a look at how Database statements are submitted and run in PHP!
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$ SQL = "INSERT INTO message (id, user, title, content, lastdate) values ('', '$ _ POST [user]', '$ _ POST [title]', '$ _ POST [content]', now ())";
Mysql_query ($ SQL ); |
We should be familiar with the blue font above, that is, inserting information in the database. The second sentence is to run the statement in the database. Think of variables similar to $ _ POST [title]. You should know that this is the information obtained through web page submission.
Instance
Install
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<Html>
<Head>
<Title> message board installation </title>
</Head>
<Body>
<Form action = "check_install.php" method = "POST">
<Table>
<Tr> <td align = "right"> <font color = "Red"> * </font> enter the address of the database server: </td> <input name = "llcc_server" type = "text" value = "localhost"> </td> </tr>
<Tr> <td align = "right"> <font color = "Red"> * </font> enter the database server user name: </td> <input name = "llcc_user_name" type = "text" value = ""> </td> </tr>
<Tr> <td align = "right"> <font color = "Red"> * </font> enter the database server password: </td> <input name = "llcc_user_pass" type = "text" value = ""> </td> </tr>
<Tr> <td align = "right"> <font color = "Red"> * </font> enter the database name: </td> <input name = "llcc_data_name" type = "text" value = ""> </td> </tr>
<Tr> <td> <input type = "submit" name = "bt_install" value = "submit"> </td> </tr>
</Table>
</Form>
</Body>
</Html> |
Check_install.php
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<? Php
// Obtain the submitted database value
$ Llcc_server =$ _ POST ['llcc _ server'];
$ Llcc_user_name = $ _ POST ['llcc _ user_name '];
$ Llcc_user_pass =$ _ POST ['llcc _ user_pass '];
$ Llcc_data_name = $ _ POST ['llcc _ data_name '];
// Open the database configuration file
$ Fp = fopen ("../config. php", 'w '); If (! $ Fp ){
Echo "sorry, try again! ";
}
// Write file content
$ Outconfig = "<? Phpn ";
$ Outconfig. = '$ server = ';
$ Outconfig. = "". $ llcc_server. "; // IP address of the database. If it is local, localhostn is used by default ";
$ Outconfig. = '$ server_name = ';
$ Outconfig. = "". $ llcc_user_name. "; // database connection username, generally rootn ";
$ Outconfig. = '$ server_pass = ';
$ Outconfig. = "". $ llcc_user_pass. "; // database connection password. N ";
$ Outconfig. = '$ server_data = ';
$ Outconfig. = "". $ llcc_data_name. "; // database name n ";
$ Outconfig. = "?> ";
$ Fw = fwrite ($ fp, $ outconfig ); If ($ fw ){
Echo "<br> <center> installation is complete! Manually delete the install folder in the directory <br> <a href = '../'> Return to the home page </a> </center> ";
}
?>
|
Login. php
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<? Php
Include ("header. php ");
Include ("conn. php "); If ($ _ GET [out]) {
Setcookie ("cookie", "out ");
Echo "<script language =" javascript "> location. href = 'login. Php'; </script> ";
}
If ($ _ POST [id] = 'admin '){
$ Pw = md5 ($ _ POST [pw]);
If ($ pw = '1b3ae77a2e06580c8cb57e0000ddc4a26 '){
Setcookie ("cookie", "OK ");
Echo "<script language =" javascript "> location. href = 'login. Php'; </script> ";
}
}
If ($ _ COOKIE ['cooker']! = 'OK '){
?>
<SCRIPT language = javascript>
Function Checklogin ()
{
If (myform. id. value = "")
{
Alert ("enter your login name ");
Myform. id. focus ();
Return false;
}
If (myform. pw. value = "")
{
Alert ("The password cannot be blank ");
Myform. pw. focus ();
Return false;
}
}
</SCRIPT>
& Lt; table width = "400" & gt;
<Form action = "" method = "post" name = "myform" onsubmit = "return Checklogin ();">
<Tr> <th> login name: </th> <td> <input type = "text" name = "id"/> </td> </tr>
<Tr> <th> password: </th> <td> <input type = "password" name = "pw"/> </td> </tr>
<Tr> <td colspan = "2"> <input type = "submit" name = "submit" value = "login"/> </td> </tr>
</Form>
</Table>
<?
} Else {
?>
<A href = '? Out = login '> exit </a> <form name = "ff">
<Input type = "submit" name = "sub" value = "clear database"> </form>
<? Php
If ($ _ GET [sub] = "clear database ")
{
$ SQL = "delete from message ";
$ Query = mysql_query ($ SQL );
}
?>
<? Php
}
?> |
Conn. php database connection
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<? Php
Include ("config. php ");
$ Conn = @ mysql_connect ($ server, $ server_name, $ server_pass) or die ("database link error ");
Mysql_select_db ($ server_data, $ conn); // The name of the database to be opened. "bbs" is my database name and changed to my own name!
Mysql_query ("set names 'gbk'"); // use GBK Chinese encoding;
?>
|
Index. Php file
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<? Php
Include ("conn. php ");
Include ("header. php ");
?>
Free House Message Board <? Php
$ SQL = "select * from message order by id DESC ";
$ Query = mysql_query ($ SQL );
While ($ row = mysql_fetch_array ($ query )){
?>
<Tr bgcolor = "# eff3ff">
<Td> <B> <? Php echo $ row [id];?> Username: </B> <? Php echo $ row [user];?> & Nbsp; <B> Title: </B> <? Php echo $ row [title];?> & Nbsp; <B> Published on: </B> <? Php echo $ row [lastdate];?> </Td>
</Tr>
<Tr bgColor = "# ffffff">
<Td> <B> Content: <? Php echo $ row [content];?> </B> </td>
</Tr>
<? Php
}
?>
</Table> |
Add. php add a program
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<? Php
Include ("header. php ");
Include ("conn. php ");
If ($ _ POST ["submit"])
{
$ SQL = "INSERT INTO message (id, user, title, content, lastdate) values ('', '$ _ POST [user]', '$ _ POST [title]', '$ _ POST [content]', now ())";
Mysql_query ($ SQL );
Echo "the message has been submitted ";
};
?> <Center> <Table border = "0" width = "450">
<Form name = "add" method = "post" onsubmit = "return CheckPost ();">
<Tr> <th> User: </th> <td> <input type = "text" name = "user" size = "10"> </td> </tr>
<Tr> <th> title: </th> <td> <input type = "text" name = "title" size = "30"> </td> </tr>
<Tr> <th> content: </th> <td> <textarea name = "content"> </textarea> </td> </tr>
<Tr> <td colspan = "2" align = "center"> <input type = "submit" name = "submit" value = "post message"> & nbsp; & nbsp; <input type = "reset" value = "reset"> </td> </tr>
</Form>
</Table>
</Center> <SCRIPT language = javascript>
Function CheckPost ()
{
If (add. user. value = "")
{
Alert ("Enter the user name ");
Add. user. focus ();
Return false;
}
If (add. title. value. length <5)
{
Alert ("the title cannot be less than five characters ");
Add. title. focus ();
Return false;
}
If (add. content. value = "")
{
Alert ("message content is required ");
Add. content. focus ();
Return false;
}
}
</SCRIPT> |
Test. php database structure
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<? Php
Include ("config. php ");
Include ("conn. php ");
$ SQL = "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 ('id ')
) ENGINE = InnoDB default charset = gbk AUTO_INCREMENT = 1 ;";
$ Query = mysql_query ($ SQL );
If ($ query ){
Echo "executed successfully ";}
Else echo "execution failed! ";
?> |
