Page 316 - Beginning PHP 5.3

Part III: Using PHP in Practice

Try It Out Remember User Information
In this example, you create a script that can store the visitor ’ s first name and location in two browser
cookies, retrieve and display the information from the cookies, and delete the cookies on request.
Save the following script as remember_me.php in your document root folder, then run the script in
your browser. You ’ ll see a form asking you for your name and location. Enter the information and
click Send Info. You ’ ll see a page similar to Figure 10 - 2 . Try reloading the page in your browser, or
reopening the URL in a new browser window. Notice how the script remembers your information,
even though you ’ ve sent a fresh request to the server. You can even restart your browser and return to
the page, and the script still remembers your details.
Click the “ Forget about me! ” link to delete the cookies containing your details. The script redisplays
the user details form.

< ?php

if ( isset( $_POST[“sendInfo”] ) ) {
storeInfo();
} elseif ( isset( $_GET[“action”] ) and $_GET[“action”] == “forget” ) {
forgetInfo();
} else {
displayPage();
}

function storeInfo() {
if ( isset( $_POST[“firstName”] ) ) {
setcookie( “firstName”, $_POST[“firstName”], time() + 60 * 60 * 24 * 365,
“”, “”, false, true );
}
if ( isset( $_POST[“location”] ) ) {
setcookie( “location”, $_POST[“location”], time() + 60 * 60 * 24 * 365, “”,
“”, false, true );
}

header( “Location: remember_me.php” );
}
function forgetInfo() {
setcookie( “firstName”, “”, time() - 3600, “”, “”, false, true );
setcookie( “location”, “”, time() - 3600, “”, “”, false, true );
header( “Location: remember_me.php” );
}

function displayPage() {
$firstName = ( isset( $_COOKIE[“firstName”] ) ) ? $_COOKIE[“firstName”] : “”;
$location = ( isset( $_COOKIE[“location”] ) ) ? $_COOKIE[“location”] : “”;

? >

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