Page 331 - Beginning PHP 5.3

Chapter 10: Preserving State With Query Strings
function displayPage() {
displayPageHeader();
? >

< p > Welcome, < strong > < ?php echo $_SESSION[“username”] ? > < /strong > ! You are

currently logged in. < /p >

< p > < a href=”login.php?action=logout” > Logout < /a > < /p >

< /body >
< /html >
< ?php
}
function displayLoginForm( $message=”” ) {
displayPageHeader();
? >
< ?php if ( $message ) echo ‘ < p class=”error” > ’ . $message . ‘ < /p > ’ ? >
< form action=”login.php” method=”post” >
< div style=”width: 30em;” >
< label for=”username” > Username < /label >
< input type=”text” name=”username” id=”username” value=”” / >
< label for=”password” > Password < /label >
< input type=”password” name=”password” id=”password” value=”” / >
< div style=”clear: both;” >
< input type=”submit” name=”login” value=”Login” / >
< /div >
< /div >
< /form >
< /body >
< /html >
< ?php
}
function displayPageHeader() {
? >
< !DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN”
“http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd” >
< html xmlns=”http://www.w3.org/1999/xhtml” xml:lang=”en” lang=”en” >
< head >
< title > A login/logout system < /title >
< link rel=”stylesheet” type=”text/css” href=”common.css” / >
< style type=”text/css” >
.error { background: #d33; color: white; padding: 0.2em; }
< /style >
< /head >
< body >
< h1 > A login/logout system < /h1 >
< ?php
}

? >

293

9/21/09 9:05:16 AM
c10.indd 293
c10.indd 293 9/21/09 9:05:16 AM