Here we have pm_user, which is a data table without creating tables. You can create a table by yourself. Next we will only introduce the program code for logging on with php and then logging out. If you need it, please refer to it.
Login.htm
| The Code is as follows: |
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<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> untitled document </title>
</Head> <Body>
<Form id = "form1" name = "form1" method = "post" action = "">
<P>
<Label for = "user"> </label>
<Input type = "text" name = "user" id = "user"/>
</P>
<P>
<Label for = "pwd"> </label>
<Input type = "text" name = "pwd" id = "pwd"/>
</P>
<P>
<Input type = "submit" name = "button" id = "button" value = "submit"/>
</P>
</Form>
</Body>
</Html> |
Login. php
| The Code is as follows: |
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Function showPage () // determine whether to log on without logon. directly jump to the logon page.
{
If (! Isset ($ _ SESSION ["user"]) &! Isset ($ _ SESSION ["pwd"])
{
If (isset ($ _ COOKIE ["user"]) & isset ($ _ COOKIE ["pwd"])
{
$ SQL = "select * from pm_user where u_user = '$ _ COOKIE [user]'";
$ Query = mysql_query ($ SQL );
$ IsUser = is_array ($ row = mysql_fetch_array ($ query); // judge the user name
$ IsPwd = $ isUser? $ Row ["u_pwd"] === _ COOKIE ["pwd"]: false; // determine the password
If ($ isPwd)
{
$ _ SESSION ["user"] = $ _ COOKIE ["user"];
$ _ SESSION ["pwd"] = $ _ COOKIE ["pwd"];
$ _ SESSION ["id"] = $ _ COOKIE ["id"];
$ _ SESSION ["name"] = $ _ COOKIE ["name"];
}
}
}
If (! Isset ($ _ SESSION ["user"]) &! Isset ($ _ SESSION ["pwd"])
{
Echo '<script> alert ("You have not logged on! Returning to the login page... "); location. href =" index. php "; </script> ';
Exit ();
}
} |
Log out
Out. php
| The Code is as follows: |
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Function loginOut () // logout function
{
If (isset ($ _ GET ["login"]) = 'out ')
{
$ _ SESSION ["user"] = '';
$ _ SESSION ["pwd"] = '';
$ _ SESSION ["id"] = '';
$ _ SESSION ["name"] = '';
Session_destroy ();
Echo '<script> alert ("exited successfully! "); Location. href =" index. php "; </script> ';
}
} |
