Wordpress code snippets

wordpress-code-snippets.php

<?php
/* Add excerpt for page posty type */
add_post_type_support('page', 'excerpt');
?>

<?php
/* Add shortcode for current year */
add_shortcode('current_year', 'tmmc_current_year_shortcode');
function tmmc_current_year_shortcode() {
  return date('Y');
}
?>

<?php
/* Enable shortcodes in text widgets */
add_filter('widget_text', 'do_shortcode');
?>

<?php
/* Add Google Analytics */
add_action('wp_head', 'tmmc_add_googleanalytics');
function tmmc_add_googleanalytics() { ?>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXXXXX"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());
  gtag('config', 'G-XXXXXXXXXX');
</script>
<?php }
?>

<?php
/* Add script for animated header */
add_action('wp_footer', 'tmmc_add_animatedheader');
function tmmc_add_animatedheader() { ?>
<script>
jQuery(document).ready(function($) {
	// == Basic variables
	var win               = $(window),
		doc               = $(document),
		root              = $('html'),
		body              = $('body'),
		navbarHeight      = 70,  // Navbar height on desktop
		navbarInitHeight  = 80,  // Initial height
		navbarBreakPoint  = 992, // Bootstrap var grid-float-breakpoint = screen-md = 992px (or grid-float-breakpoint-max = screen-md - 1)
		locationHref      = $(location).attr('href'),
		locationPathname  = $(location).attr('pathname'),
		locationHost      = $(location).attr('host'),
		locationHostname  = $(location).attr('hostname'),
		locationPort      = $(location).attr('port'),
		locationQuery     = $(location).attr('search');
	// == Animated header
	win.scroll(function () {
	  if (doc.scrollTop() >= navbarInitHeight) {
		// Class may change to any 'navbar-<target>' or any 'navbar-<dest>'.
		$("#masthead").addClass("navbar-animated");		// or removeClass
	  } else {
		$("#masthead").removeClass("navbar-animated");	// or addClass
	  }
	});
});
</script>
<?php }
?>