Why is my $_SESSION variable disappearing?
Question
I have a function
$capdir = get_template_directory_uri() . '/assets/captcha/';
$capmap = array(
'cat' => $capdir . 'Captcha_Cat.png',
'dog' => $capdir . 'Captcha_Dog.png',
'fish' => $capdir . 'Captcha_Fish.png'
);
function set_animal_captcha ( )
{
global $capmap;
// returns image url of random animal and stores in session storage
// a reference to that animal
$randAnimal = array_rand($capmap, 1);
$_SESSION['animal'] = $randAnimal;
die($capmap[$randAnimal]);
}
which is fired on page load and which I've confirmed is working successfully. Then I have a function
add_action('wp_ajax_nopriv_contact', 'contact');
add_action('wp_ajax_contact', 'contact');
// $nameMap is a map of input names to table cells in the email
// e.g. <input name="email" value="myemail@gmail.com"/> gets made into the row <tr><td><b>Email Address:<b></td><td>myemail@gmail.com</td></tr>
// by the mapping 'email' => 'Email Address' in the array
$nameMap = array(
'name' => 'Name',
'email' => 'Email Address',
'phone' => 'Phone Number',
'comments' => 'Stuff in text box'
);
// https://css-tricks.com/sending-nice-html-email-with-php/
$headers = "MIME-Version: 1.0\r\nContent-Type: text/html; charset=ISO-8859-1\r\n";
function contact ( )
{
global $nameMap, $headers;
$info = array(
// name good as long as its not empty
'validName' => (strlen(trim($_POST['name'])) > 0 ? true : false),
// http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address
// http://stackoverflow.com/questions/123559/a-comprehensive-regex-for-phone-number-validation
'validEmail' => (preg_match("!^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$!", trim($_POST['email'])) == 1 ? true : false),
'validPhoneNumber' => (preg_match("!^(?:(?:\+?1\s*(?:[.-]\s*)?)?(?:\(\s*([2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9])\s*\)|([2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9]))\s*(?:[.-]\s*)?)?([2-9]1[02-9]|[2-9][02-9]1|[2-9][02-9]{2})\s*(?:[.-]\s*)?([0-9]{4})(?:\s*(?:#|x\.?|ext\.?|extension)\s*(\d+))?$!",trim($_POST['phone'])) == 1 ? true : false),
// if answer to captch equals animal in session storage
'correctAnimal' => ($_SESSION['animal'] === trim(strtolower($_POST['capanswer'])))
);
// see http://stackoverflow.com/questions/482377/php-regex-delimiter-whats-the-point about why "!" is around the regexes
if (!$info['validName'] || !$info['validEmail'] || !$info['validPhoneNumber'] || !$info['correctAnimal'] ) // if invalid name, email or phone number
{
$info['sentEmail'] = false;
} else {
// inputs contained valid values
// contstruct email body
$emailMsg = '<html><body><h3>Someone submitted a contact form ...</h3><table>';
foreach ($_POST as $key => $value) if (array_key_exists($key, $nameMap)) $emailMsg .= '<tr><td><b>' . $nameMap[$key] . ':</b></td><td>' . $value . '</td></tr>';
$emailMsg .= '</table></body></html>';
// attempt to send email and set 'sentEmail' key accordingly
$info['sentEmail'] = mail("myemail@gmail.com", "A Comment Was Submitted",$emailMsg,$headers) ? true : false;
}
echo json_encode($info);
die();
}
which is fired when a form is submitted on the page, but I've figured out that the
$_SESSION['animal']
is not defined when that function is fired. What are the possible reasons for this.
(Oh yea, and as you see, I always comment out citations to Stack Overflow posts that I copy-paste into production code haha)
1 answers
solution1
1 2015-11-13 22:18:21
The first thing I would check is if cookies are disabled on the client.
Without cookies, I believe the session will reside in memory on the server for the full execution of the script upon initial request -- and then disappear before the next page request is made.
Is your entire $_SESSION disappearing, or just 'animal'?
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