diff --git a/functions.php b/functions.php
index da37ecd..05b5daf 100644
--- a/functions.php
+++ b/functions.php
@@ -1,46 +1,60 @@
 <?php
+/**
+ * WP Tide functions.php file
+ */
 
-// Define paths
+// Define paths.
 define( 'DOCS_URI', get_stylesheet_directory_uri() . '/_docpress' );
-define( 'DOCS_PATH', dirname(__FILE__) . '/_docpress' );
+define( 'DOCS_PATH', __DIR__ . '/_docpress' );
 
-// Require theme functions
-require_once( 'functions/enqueue-styles.php' );
-require_once( 'functions/enqueue-scripts.php' );
+// Require theme functions.
+require_once 'functions/enqueue-styles.php';
+require_once 'functions/enqueue-scripts.php';
 
-// Helpers
-require_once( 'functions/get-current-url.php' );
+// Helpers.
+require_once 'functions/get-current-url.php';
 
-// Docpress
-require_once( 'functions/docpress-get-dirs.php' );
-require_once( 'functions/docpress-get-file-path.php' );
-require_once( 'functions/docpress-make-absolute-urls.php' );
+// Docpress.
+require_once 'functions/docpress-get-dirs.php';
+require_once 'functions/docpress-get-file-path.php';
+require_once 'functions/docpress-make-absolute-urls.php';
 
 define( 'DOCS_FILE_PATH', docpress_get_file_path() );
 
-// Enables themes to manage the document title tag
-add_action( 'after_setup_theme', function() {
-	add_theme_support( 'title-tag' );
-} );
+// Enables themes to manage the document title tag.
+add_action(
+	'after_setup_theme',
+	function () {
+		add_theme_support( 'title-tag' );
+	}
+);
 
 // Remove unused scripts & styles.
-add_action('init', function() {
-	global $pagenow;
-
-	if ( 'wp-login.php' !== $pagenow && ! is_admin() ) {
-		wp_deregister_script( 'wp-embed' );
-		wp_deregister_script( 'jquery' );
-		remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
-		remove_action( 'wp_print_styles', 'print_emoji_styles' );
+add_action(
+	'init',
+	function () {
+		global $pagenow;
+
+		if ( 'wp-login.php' !== $pagenow && ! is_admin() ) {
+			wp_deregister_script( 'wp-embed' );
+			wp_deregister_script( 'jquery' );
+			remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
+			remove_action( 'wp_print_styles', 'print_emoji_styles' );
+		}
 	}
-} );
+);
 
 // Block 301 redirect.
-add_filter( 'redirect_canonical', function( $redirect_url, $requested_url ) {
-	if ( strpos( $requested_url, 'api/tide/v1' ) === false ) {
-		return '';
-	}
-}, 10, 2 );
+add_filter(
+	'redirect_canonical',
+	function ( $redirect_url, $requested_url ) {
+		if ( strpos( $requested_url, 'api/tide/v1' ) === false ) {
+			return '';
+		}
+	},
+	10,
+	2
+);
 
 /**
  * Filter to override a 404.
@@ -48,38 +62,45 @@
  * The links are actually 404 errors, the pages don't exist really. We're faking status 200
  * We just use the routes to pass in info on what file we want to include within index.php.
  */
-add_filter( 'template_redirect', function() {
-	global $wp_query;
-
-	if ( file_exists( DOCS_FILE_PATH ) ) {
-		add_filter( 'wp_title', function( $title ) {
-			$title     = 'Tide Docs';
-			$fileparts = explode( '/', get_current_url() );
-			$page      = end( $fileparts );
-			$new_title = ucwords( str_replace( '-', ' ', $page ) );
-
-			if ( $new_title ) {
-				if ( 'Gcp' === $new_title ) {
-					$new_title = 'Google Cloud Platform';
-				} else if ( 'Aws' === $new_title ) {
-					$new_title = 'Amazon Web Services';
-				} else if ( 'Search' === $new_title ) {
-					$new_title = 'API Search';
-				} else if ( 'Api' === $new_title ) {
-					$new_title = 'API';
-				} else if ( 'Phpcs Server' === $new_title ) {
-					$new_title = 'PHPCS Server';
-				}
-
-				$title =  "$title — $new_title";
-			}
-
-			return $title;
-		}, 10 );
-		status_header( 200 );
-		$wp_query->is_404 = false;
+add_filter(
+	'template_redirect',
+	function () {
+		global $wp_query;
+
+		if ( file_exists( DOCS_FILE_PATH ) ) {
+			add_filter(
+				'wp_title',
+				function ( $title ) {
+					$title     = 'Tide Docs';
+					$fileparts = explode( '/', get_current_url() );
+					$page      = end( $fileparts );
+					$new_title = ucwords( str_replace( '-', ' ', $page ) );
+
+					if ( $new_title ) {
+						if ( 'Gcp' === $new_title ) {
+							$new_title = 'Google Cloud Platform';
+						} elseif ( 'Aws' === $new_title ) {
+							$new_title = 'Amazon Web Services';
+						} elseif ( 'Search' === $new_title ) {
+							$new_title = 'API Search';
+						} elseif ( 'Api' === $new_title ) {
+							$new_title = 'API';
+						} elseif ( 'Phpcs Server' === $new_title ) {
+							$new_title = 'PHPCS Server';
+						}
+
+						$title = "$title — $new_title";
+					}
+
+					return $title;
+				},
+				10
+			);
+			status_header( 200 );
+			$wp_query->is_404 = false;
+		}
 	}
-} );
+);
 
 /**
  * Filter to override a 404.
@@ -87,25 +108,30 @@
  * The links are actually 404 errors, the pages don't exist really. We're faking status 200
  * We just use the routes to pass in info on what file we want to include within index.php.
  */
-add_filter( 'body_class', function( $classes ) {
-	global $wp_query;
+add_filter(
+	'body_class',
+	function ( $classes ) {
+		global $wp_query;
 
-	if ( strpos( DOCS_FILE_PATH, '404.html' ) !== false && file_exists( DOCS_FILE_PATH ) ) {
-		$classes[] = 'error404';
-	}
+		if ( strpos( DOCS_FILE_PATH, '404.html' ) !== false && file_exists( DOCS_FILE_PATH ) ) {
+			$classes[] = 'error404';
+		}
 
-	if ( strpos( DOCS_FILE_PATH, 'search.html' ) !== false && file_exists( DOCS_FILE_PATH ) ) {
-		$classes[] = 'is-search';
-	}
+		if ( strpos( DOCS_FILE_PATH, 'search.html' ) !== false && file_exists( DOCS_FILE_PATH ) ) {
+			$classes[] = 'is-search';
+		}
 
-	return $classes;
-} );
+		return $classes;
+	}
+);
 
 /**
  * Add GA tracking code to the HEAD.
  */
-add_action( 'wp_head', function() {
-	if ( strpos( get_home_url(), 'wptide.org' ) !== false ) { ?>
+add_action(
+	'wp_head',
+	function () {
+		if ( strpos( get_home_url(), 'wptide.org' ) !== false ) { ?>
 
 <!-- Google Analytics -->
 <script async src="https://www.googletagmanager.com/gtag/js?id=UA-135952573-1"></script>
@@ -116,5 +142,8 @@ function gtag(){dataLayer.push(arguments);}
 	gtag('config', 'UA-135952573-1');
 </script>
 
-	<?php }
-}, 0 );
+			<?php
+		}
+	},
+	0
+);
diff --git a/functions/docpress-get-dirs.php b/functions/docpress-get-dirs.php
index a4be8ff..752fcaf 100644
--- a/functions/docpress-get-dirs.php
+++ b/functions/docpress-get-dirs.php
@@ -1,16 +1,32 @@
 <?php
 
-function docpress_get_dirs () {
-	$dir_iterator = new RecursiveDirectoryIterator(DOCS_PATH);
+/**
+ * Retrieve a list of relative directory paths from the DOCS_PATH directory.
+ *
+ * @return array List of relative directory paths.
+ */
+function docpress_get_dirs() {
+	// Create a directory iterator for the DOCS_PATH directory.
+	$dir_iterator = new RecursiveDirectoryIterator( DOCS_PATH );
+
+	// Get the current URL's relative path (not used in this function currently).
 	$relative_url = str_replace( site_url( '/' ), '', get_current_url() );
 
-	$all_dirs = array_filter( iterator_to_array($dir_iterator), function ( $file ) {
-		return $file->isDir();
-	} );
+	// Filter the iterator to include only directories.
+	$all_dirs = array_filter(
+		iterator_to_array( $dir_iterator ),
+		function ( $file ) {
+			return $file->isDir();
+		}
+	);
 
-	$relative_dirs = array_map( function ($file) {
-		return str_replace( DOCS_PATH . '/', '', $file );
-	}, array_keys( $all_dirs ) );
+	// Convert absolute paths to relative paths by removing the DOCS_PATH prefix.
+	$relative_dirs = array_map(
+		function ( $file ) {
+			return str_replace( DOCS_PATH . '/', '', $file );
+		},
+		array_keys( $all_dirs )
+	);
 
 	return str_replace( '//', '/', $relative_dirs );
-}
\ No newline at end of file
+}
diff --git a/functions/docpress-get-file-path.php b/functions/docpress-get-file-path.php
index 57bf2a9..c10710a 100644
--- a/functions/docpress-get-file-path.php
+++ b/functions/docpress-get-file-path.php
@@ -1,12 +1,25 @@
 <?php
 
-function docpress_get_file_path () {
+/**
+ * Get the full file path of the requested documentation page.
+ *
+ * @return string Full path to the documentation HTML file.
+ */
+function docpress_get_file_path() {
+	// Get the current URL path relative to the site root.
 	$relative_url = str_replace( site_url( '/' ), '', get_current_url() );
-	$filename = ( '' === $relative_url) ? 'index'
-		: in_array($relative_url, docpress_get_dirs()) ? $relative_url .'/index'
-		: $relative_url;
 
-	$file = DOCS_PATH .'/'. $filename .'.html';
+	// Determine the filename based on the relative URL:
+	// - If the URL is empty, use 'index'
+	// - If it matches a directory, append '/index'
+	// - Otherwise, use the URL as-is
+	$filename = ( '' === $relative_url )
+		? 'index'
+		: ( in_array( $relative_url, docpress_get_dirs(), true )
+			? $relative_url . '/index'
+			: $relative_url );
+
+	$file = DOCS_PATH . '/' . $filename . '.html';
 
 	return str_replace( '//', '/', $file );
-}
\ No newline at end of file
+}
diff --git a/functions/docpress-make-absolute-urls.php b/functions/docpress-make-absolute-urls.php
index 0646670..2aee756 100644
--- a/functions/docpress-make-absolute-urls.php
+++ b/functions/docpress-make-absolute-urls.php
@@ -1,26 +1,44 @@
 <?php
 
-function docpress_make_absolute_urls ($file_contents) {
-	$file_iterator = new RecursiveIteratorIterator( new RecursiveDirectoryIterator(DOCS_PATH . '/') );
+/**
+ * Convert relative URLs in the given HTML content to absolute URLs.
+ *
+ * @param string $file_contents The HTML content with potential relative URLs.
+ * @return string The modified HTML content with absolute URLs.
+ */
+function docpress_make_absolute_urls( $file_contents ) {
+	$file_iterator = new RecursiveIteratorIterator( new RecursiveDirectoryIterator( DOCS_PATH . '/' ) );
 
-	$all_files = array_filter( iterator_to_array($file_iterator), function ($file) {
-		return $file->isFile() && 'html' === pathinfo($file, PATHINFO_EXTENSION);
-	} );
-
-	$relative_paths = array_map( function ($file) {
-		$path = str_replace( DOCS_PATH . '/', '', $file );
-		if ( $path ) {
-			return $path;
+	$all_files = array_filter(
+		iterator_to_array( $file_iterator ),
+		function ( $file ) {
+			return $file->isFile() && 'html' === pathinfo( $file, PATHINFO_EXTENSION );
 		}
-	}, array_keys( $all_files ) );
+	);
+
+	$relative_paths = array_map(
+		function ( $file ) {
+			$path = str_replace( DOCS_PATH . '/', '', $file );
+			if ( $path ) {
+				return $path;
+			}
+		},
+		array_keys( $all_files )
+	);
 
-	$href_match = array_map( function ($file) {
-		return 'href="'. $file .'"';
-	}, $relative_paths);
+	$href_match = array_map(
+		function ( $file ) {
+			return 'href="' . $file . '"';
+		},
+		$relative_paths
+	);
 
-	$href_replace = array_map( function ($file) {
-		return 'href="'. site_url() . '/' . str_replace(array('/index.html', 'index.html', '.html', '/index'), '', $file) .'"';
-	}, $relative_paths );
+	$href_replace = array_map(
+		function ( $file ) {
+			return 'href="' . site_url() . '/' . str_replace( array( '/index.html', 'index.html', '.html', '/index' ), '', $file ) . '"';
+		},
+		$relative_paths
+	);
 
 	$parts = explode( '/', get_current_url() );
 	$files = array(
@@ -29,23 +47,23 @@ function docpress_make_absolute_urls ($file_contents) {
 		'local-development',
 	);
 
-	// Links
-	$content = str_replace($href_match, $href_replace, $file_contents); // replace all relative href file matches with absolute urls and remove .html & index
+	// Links.
+	$content = str_replace( $href_match, $href_replace, $file_contents ); // replace all relative href file matches with absolute urls and remove .html & index
 	if ( in_array( end( $parts ), $files, true ) ) {
-		$content = preg_replace('#href="(?!\/|https?:\/\/|mailto:|\#)(.*)"#im', 'href="'. site_url() .'/$1"', $content); // replace relative links inside root level files to other root level files
+		$content = preg_replace( '#href="(?!\/|https?:\/\/|mailto:|\#)(.*)"#im', 'href="' . site_url() . '/$1"', $content ); // replace relative links inside root level files to other root level files
 	}
-	$content = preg_replace('#href="(?:\.\.\/)(.+)"#im', 'href="'. site_url() .'/$1"', $content); // replace ../
-	$content = preg_replace('#href="(.+)(?:(\/.*)\.html)"#im', 'href="$1$2"', $content); // replace .html links
-	$content = preg_replace('#href="(.+)(\/index)"#im', 'href="$1"', $content); // replace /index links
-	$content = preg_replace('#href="(?!mailto:)([^\/\#]+)(\#.+)*"#im', 'href="'. get_current_url() .'/$1"', $content); // replace sibling links
-	$content = preg_replace('#href="' . site_url() . '(?:\/\/)([^"]*)"#im', 'href="' . site_url() . '/$1"', $content); // replace path//file links
+	$content = preg_replace( '#href="(?:\.\.\/)(.+)"#im', 'href="' . site_url() . '/$1"', $content ); // replace ../
+	$content = preg_replace( '#href="(.+)(?:(\/.*)\.html)"#im', 'href="$1$2"', $content ); // replace .html links
+	$content = preg_replace( '#href="(.+)(\/index)"#im', 'href="$1"', $content ); // replace /index links
+	$content = preg_replace( '#href="(?!mailto:)([^\/\#]+)(\#.+)*"#im', 'href="' . get_current_url() . '/$1"', $content ); // replace sibling links
+	$content = preg_replace( '#href="' . site_url() . '(?:\/\/)([^"]*)"#im', 'href="' . site_url() . '/$1"', $content ); // replace path//file links
 
-	// Images
-	$content = preg_replace('#src="(?!https?:\/\/)(?!data:)(.+)"#im', 'src="'. DOCS_URI .'/$1"', $content); // fix relative images
-	$content = preg_replace('#src="(.+)(?:\.\.\/)(.+)"#im', 'src="$1$2"', $content); // replace ../
+	// Images.
+	$content = preg_replace( '#src="(?!https?:\/\/)(?!data:)(.+)"#im', 'src="' . DOCS_URI . '/$1"', $content ); // fix relative images
+	$content = preg_replace( '#src="(.+)(?:\.\.\/)(.+)"#im', 'src="$1$2"', $content ); // replace ../
 
 	// @todo Find a better way to fix the invalid URL coming from `docpress`.
-	$content = preg_replace('/trunk\/wordpress.org\/public\//', 'trunk/wordpress.org/public_html/', $content );
+	$content = preg_replace( '/trunk\/wordpress.org\/public\//', 'trunk/wordpress.org/public_html/', $content );
 
 	return $content;
-}
\ No newline at end of file
+}
diff --git a/functions/enqueue-scripts.php b/functions/enqueue-scripts.php
index 4eaaf74..01a3599 100644
--- a/functions/enqueue-scripts.php
+++ b/functions/enqueue-scripts.php
@@ -1,5 +1,11 @@
 <?php
 
-add_action( 'wp_enqueue_scripts', function() {
-  wp_enqueue_script('docpress-js', DOCS_URI.'/assets/script.js', array(), '1.0', true );
-});
\ No newline at end of file
+/**
+ * Enqueue frontend scripts
+ */
+add_action(
+	'wp_enqueue_scripts',
+	function () {
+		wp_enqueue_script( 'docpress-js', DOCS_URI . '/assets/script.js', array(), '1.0', true );
+	}
+);
diff --git a/functions/enqueue-styles.php b/functions/enqueue-styles.php
index 7c4f6ee..4c22735 100644
--- a/functions/enqueue-styles.php
+++ b/functions/enqueue-styles.php
@@ -1,5 +1,11 @@
 <?php
 
-add_action( 'wp_enqueue_scripts', function() {
-  wp_enqueue_style('docpress-style', DOCS_URI.'/assets/style.css', false, '1.0', 'all');
-});
\ No newline at end of file
+/**
+ * Enqueue frontend styles.
+ */
+add_action(
+	'wp_enqueue_scripts',
+	function () {
+		wp_enqueue_style( 'docpress-style', DOCS_URI . '/assets/style.css', false, '1.0', 'all' );
+	}
+);
diff --git a/functions/get-current-url.php b/functions/get-current-url.php
index 3e3b1ce..0df91b1 100644
--- a/functions/get-current-url.php
+++ b/functions/get-current-url.php
@@ -1,15 +1,32 @@
 <?php
 
-function url_origin(){
-    $ssl      = ( ! empty( $_SERVER['HTTPS'] ) && 'on' === $_SERVER['HTTPS'] );
-    $sp       = strtolower( $_SERVER['SERVER_PROTOCOL'] );
-    $protocol = substr( $sp, 0, strpos( $sp, '/' ) ) . ( ( $ssl ) ? 's' : '' );
-    $port     = $_SERVER['SERVER_PORT'];
-    $port     = ( ( ! $ssl && '80' === $port ) || ( $ssl && '443' === $port ) ) ? '' : ':'.$port;
-    $host     = isset( $_SERVER['HTTP_HOST'] ) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME'] . $port;
-    return $protocol . '://' . $host;
+/**
+ * Get the origin part of the current URL (protocol + host + optional port).
+ *
+ * @return string The URL origin.
+ */
+function url_origin() {
+	$ssl      = ! empty( $_SERVER['HTTPS'] && 'on' === $_SERVER['HTTPS'] );
+	$sp       = strtolower( $_SERVER['SERVER_PROTOCOL'] );
+	$protocol = substr( $sp, 0, strpos( $sp, '/' ) ) . ( ( $ssl ) ? 's' : '' );
+
+	// Determine the port, but omit it if it's the default (80 for HTTP, 443 for HTTPS).
+	$port = isset( $_SERVER['SERVER_PORT'] ) ? $_SERVER['SERVER_PORT'] : '';
+	$port = ( ( ! $ssl && '80' === $port ) || ( $ssl && '443' === $port ) ) ? '' : ':' . $port;
+
+	// Determine the host.
+	$host = isset( $_SERVER['HTTP_HOST'] ) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME'] . $port;
+	return $protocol . '://' . $host;
 }
 
+/**
+ * Get the full current URL, including protocol, host, and request URI.
+ *
+ * @return string The full current URL.
+ */
 function get_current_url() {
-    return url_origin() . $_SERVER['REQUEST_URI'];
+	// Fallback to '/' if REQUEST_URI is not set.
+	$request_uri = isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : '/';
+
+	return url_origin() . $request_uri;
 }