php mail for gmail with smtp not working

Following is my code and I am using google apps for business. I have replaced my password with * in the following code. I am using apache2.

<!DOCTYPE html>
<html>
<body>

<h1>My first PHP page</h1>
<?php
    require("class.phpmailer.php");

    $mail = new PHPMailer();

    $mail->IsSMTP();  // telling the class to use SMTP
    $mail->SMTPAuth   = true; // SMTP authentication
    $mail->Host       = "smtp.gmail.com"; // SMTP server
    $mail->Port       = 465; // SMTP Port
    $mail->Username   = "adminbot@mycompany.com"; // SMTP account username
    $mail->Password   = "*********";        // SMTP account password

    $mail->SetFrom('adminbot@mycompany.com', 'John Doe'); // FROM
    $mail->AddReplyTo('adminbot@mycompany.com', 'John Doe'); // Reply TO

    $mail->AddAddress('ZTruse1955@mycompany.com', 'Jane Doe'); // recipient email

    $mail->Subject    = "First SMTP Message"; // email subject
    $mail->Body       = "Hi! \n\n This is my first e-mail sent through Google SMTP using PHPMailer.";

    if(!$mail->Send()) {
      echo 'Message was not sent.';
      echo 'Mailer error: ' . $mail->ErrorInfo;
    } else {
      echo 'Message has been sent.';
    }
?>

When I open the page I get blank with no mail received upon opening the page. Do I need to install any php libraries for this to work apart from default lap installation?

I have shared two different mail methods for your requirement..

First case;

// Pear Mail Library
require_once "Mail.php";

$from = '<from.gmail.com>';
$to = '<to.yahoo.com>';
$subject = 'Hi!';
$body = "Hi,\n\nHow are you?";

$headers = array(
    'From' => $from,
    'To' => $to,
    'Subject' => $subject
);

$smtp = Mail::factory('smtp', array(
        'host' => 'ssl://smtp.gmail.com',
        'port' => '465',
        'auth' => true,
        'username' => 'johndoe@gmail.com',
        'password' => 'passwordxxx'
    ));

$mail = $smtp->send($to, $headers, $body);

if (PEAR::isError($mail)) {
    echo('<p>' . $mail->getMessage() . '</p>');
} else {
    echo('<p>Message successfully sent!</p>');
}

Second case; (http://ctrlq.org/code/19589-send-mail-php)

$mail = new PHPMailer;

$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'smtp.gmail.com';                       // Specify main and backup server
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = 'amit@gmail.com';                   // SMTP username
$mail->Password = 'digitalinspiration';               // SMTP password
$mail->SMTPSecure = 'tls';                            // Enable encryption, 'ssl' also accepted
$mail->Port = 587;                                    //Set the SMTP port number - 587 for authenticated TLS
$mail->setFrom('amit@gmail.com', 'Amit Agarwal');     //Set who the message is to be sent from
$mail->addReplyTo('labnol@gmail.com', 'First Last');  //Set an alternative reply-to address
$mail->addAddress('josh@example.net', 'Josh Adams');  // Add a recipient
$mail->addAddress('ellen@example.com');               // Name is optional
$mail->addCC('cc@example.com');
$mail->addBCC('bcc@example.com');
$mail->WordWrap = 50;                                 // Set word wrap to 50 characters
$mail->addAttachment('/usr/labnol/file.doc');         // Add attachments
$mail->addAttachment('/images/image.jpg', 'new.jpg'); // Optional name
$mail->isHTML(true);                                  // Set email format to HTML

$mail->Subject = 'Here is the subject';
$mail->Body    = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
$mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__));

if(!$mail->send()) {
   echo 'Message could not be sent.';
   echo 'Mailer Error: ' . $mail->ErrorInfo;
   exit;
}

echo 'Message has been sent';

Try it and hope it will solve your issues !