Magento2: Customer name is not showing on product page

Question

When the cache is enabled customer name is not showing on the product page.

When the cache is disabled customer name is showing properly on the product page.

header.phtml

<?php
/**
 * Copyright © 2013-2017 Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

// @codingStandardsIgnoreFile

/**
 * @var \Magento\Theme\Block\Html\Header $block
 */

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$customerSession = $objectManager->get('Magento\Customer\Model\Session');

//$welcomeMessage = $block->getWelcome();
?>

<li><a href="<?php echo $block->getUrl('about-us'); ?>">About Us</a></li>
<li><a href="<?php echo $block->getUrl('contact-us'); ?>">Contact Us</a></li>
<li><a href="<?php echo $block->getUrl('sales/order/history'); ?>">My Orders</a></li>
<li><a href="<?php echo $block->getUrl('wishlist'); ?>">Wish List</a></li>
<li><a href="<?php echo $block->getUrl('ordertracking'); ?>">Track Order</a></li>

<?php echo $this->getLayout()
    ->createBlock('Codism\Csr\Block\Index\TopMenu')
    ->setTemplate('Codism_Csr::menu.phtml')
    ->toHtml();
?>

<?php if($customerSession->isLoggedIn()) {?>
<li>Hi, <?php echo $customerSession->getCustomer()->getName(); ?></li>
<?php }?>

Screenshot

Answer 1

You need to add this below line in your header.phtm file :

<span data-bind="text: customer().fullname ? $t('Welcome, %1!').replace('%1', customer().fullname) : '<?=$block->escapeHtml($welcomeMessage) ?>'"></span>

Answer 2

Use below code.

<?php
/**
 * Copyright © 2013-2017 Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

// @codingStandardsIgnoreFile

/**
 * @var \Magento\Theme\Block\Html\Header $block
 */

$ObjectManager= \Magento\Framework\App\ObjectManager::getInstance();
$context = $ObjectManager->get('Magento\Framework\App\Http\Context');
$isLoggedIn = $context->getValue(\Magento\Customer\Model\Context::CONTEXT_AUTH);
$customerSession = $ObjectManager->get('Magento\Customer\Model\Session');




//$welcomeMessage = $block->getWelcome();
?>

<li><a href="<?php echo $block->getUrl('about-us'); ?>">About Us</a></li>
<li><a href="<?php echo $block->getUrl('contact-us'); ?>">Contact Us</a></li>
<li><a href="<?php echo $block->getUrl('sales/order/history'); ?>">My Orders</a></li>
<li><a href="<?php echo $block->getUrl('wishlist'); ?>">Wish List</a></li>
<li><a href="<?php echo $block->getUrl('ordertracking'); ?>">Track Order</a></li>

<?php echo $this->getLayout()
    ->createBlock('Codism\Csr\Block\Index\TopMenu')
    ->setTemplate('Codism_Csr::menu.phtml')
    ->toHtml();
?>

<?php if($isLoggedIn) {?>
<li>Hi, <?php echo $customerSession->getCustomer()->getName(); ?></li>
<?php }?>