12c01-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 54 行

<?php
// This script does three functions based upon the input.
// If it finds cookies are provided, it just displays the information.
// If it finds a POST command sent to it, it turns those into cookies,
//    and then displays the same information
// If it finds neither, it presents a form to receive the data with.

// Check if we have both the cookies that we care for:
if (isset($_COOKIE['firstname']) && isset($_COOKIE['zipcode'])) {
    // We found the cookies, so just print the standard output
    print_standard_output($_COOKIE['firstname'], $_COOKIE['zipcode']);
}
// Else, if we received a form POST with this data:
elseif (isset($_POST['firstname']) && isset($_POST['zipcode'])) {
    // First we need to create these as cookies.
    // First create 'firstname', which will only last until the browser is
    //  killed and only return to this subdirectory.
    setcookie('firstname', $_POST['firstname']);
    
    // Determine our subdomain without having to know it:
    $parts = explode('.', $_SERVER['HTTP_HOST']);
    $cp = count($parts);
    // If a 1 part hostname, like 'localhost', don't bother:
    if ($cp == 1) { $subdomain = ''; }
    // Otherwise, generate our subdomain by using the last 2 parts
    else { $subdomain = ".{$parts[$cp-2]}.{$parts[$cp-1]}"; }
    
    // Now create 'zipcode', which returns to our whole subdomain, to the
    //  entire website, (from '/'), and which doesn't expire for 30 days.
    setcookie('zipcode', $_POST['zipcode'], time()+(30*24*3600), 
        '/', $subdomain);
    
    // Now, also, just print the standard output:
    print_standard_output($_POST['firstname'], $_POST['zipcode']);
}
// We didn't have anything, so make a form so they can provide data.
else {
    echo "
<form action=\"{$_SERVER['PHP_SELF']}\" method=\"POST\">
<p>What is your first name? <input type=\"text\" name=\"firstname\" /></p>
<p>What is your zipcode? <input type=\"text\" name=\"zipcode\" /></p>
<p><input type=\"submit\" /></p>
</form>
";
}

// The standard output:
function print_standard_output($name, $zip) {
    echo "
<p>Welcome back {$name}!  Perhaps you would like to see things
 happening near your home zipcode ({$zip}) ?</p>
";
}
?>