Index: src/wp-includes/class-wp-http-curl.php
===================================================================
--- src/wp-includes/class-wp-http-curl.php	(revision 52801)
+++ src/wp-includes/class-wp-http-curl.php	(working copy)
@@ -258,7 +258,7 @@
 		curl_exec( $handle );
 
 		$processed_headers   = WP_Http::processHeaders( $this->headers, $url );
-		$theBody             = $this->body;
+		$the_body            = $this->body;
 		$bytes_written_total = $this->bytes_written_total;
 
 		$this->headers             = '';
@@ -268,7 +268,7 @@
 		$curl_error = curl_errno( $handle );
 
 		// If an error occurred, or, no response.
-		if ( $curl_error || ( 0 == strlen( $theBody ) && empty( $processed_headers['headers'] ) ) ) {
+		if ( $curl_error || ( 0 == strlen( $the_body ) && empty( $processed_headers['headers'] ) ) ) {
 			if ( CURLE_WRITE_ERROR /* 23 */ == $curl_error ) {
 				if ( ! $this->max_body_length || $this->max_body_length != $bytes_written_total ) {
 					if ( $parsed_args['stream'] ) {
@@ -316,10 +316,10 @@
 		if ( true === $parsed_args['decompress']
 			&& true === WP_Http_Encoding::should_decode( $processed_headers['headers'] )
 		) {
-			$theBody = WP_Http_Encoding::decompress( $theBody );
+			$the_body = WP_Http_Encoding::decompress( $the_body );
 		}
 
-		$response['body'] = $theBody;
+		$response['body'] = $the_body;
 
 		return $response;
 	}
Index: src/wp-includes/class-wp-http-streams.php
===================================================================
--- src/wp-includes/class-wp-http-streams.php	(revision 52801)
+++ src/wp-includes/class-wp-http-streams.php	(working copy)
@@ -206,12 +206,12 @@
 		stream_set_timeout( $handle, $timeout, $utimeout );
 
 		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { // Some proxies require full URL in this field.
-			$requestPath = $url;
+			$request_path = $url;
 		} else {
-			$requestPath = $parsed_url['path'] . ( isset( $parsed_url['query'] ) ? '?' . $parsed_url['query'] : '' );
+			$request_path = $parsed_url['path'] . ( isset( $parsed_url['query'] ) ? '?' . $parsed_url['query'] : '' );
 		}
 
-		$strHeaders = strtoupper( $parsed_args['method'] ) . ' ' . $requestPath . ' HTTP/' . $parsed_args['httpversion'] . "\r\n";
+		$str_headers = strtoupper( $parsed_args['method'] ) . ' ' . $request_path . ' HTTP/' . $parsed_args['httpversion'] . "\r\n";
 
 		$include_port_in_host_header = (
 			( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
@@ -220,34 +220,34 @@
 		);
 
 		if ( $include_port_in_host_header ) {
-			$strHeaders .= 'Host: ' . $parsed_url['host'] . ':' . $parsed_url['port'] . "\r\n";
+			$str_headers .= 'Host: ' . $parsed_url['host'] . ':' . $parsed_url['port'] . "\r\n";
 		} else {
-			$strHeaders .= 'Host: ' . $parsed_url['host'] . "\r\n";
+			$str_headers .= 'Host: ' . $parsed_url['host'] . "\r\n";
 		}
 
 		if ( isset( $parsed_args['user-agent'] ) ) {
-			$strHeaders .= 'User-agent: ' . $parsed_args['user-agent'] . "\r\n";
+			$str_headers .= 'User-agent: ' . $parsed_args['user-agent'] . "\r\n";
 		}
 
 		if ( is_array( $parsed_args['headers'] ) ) {
-			foreach ( (array) $parsed_args['headers'] as $header => $headerValue ) {
-				$strHeaders .= $header . ': ' . $headerValue . "\r\n";
+			foreach ( (array) $parsed_args['headers'] as $header => $header_value ) {
+				$str_headers .= $header . ': ' . $header_value . "\r\n";
 			}
 		} else {
-			$strHeaders .= $parsed_args['headers'];
+			$str_headers .= $parsed_args['headers'];
 		}
 
 		if ( $proxy->use_authentication() ) {
-			$strHeaders .= $proxy->authentication_header() . "\r\n";
+			$str_headers .= $proxy->authentication_header() . "\r\n";
 		}
 
-		$strHeaders .= "\r\n";
+		$str_headers .= "\r\n";
 
 		if ( ! is_null( $parsed_args['body'] ) ) {
-			$strHeaders .= $parsed_args['body'];
+			$str_headers .= $parsed_args['body'];
 		}
 
-		fwrite( $handle, $strHeaders );
+		fwrite( $handle, $str_headers );
 
 		if ( ! $parsed_args['blocking'] ) {
 			stream_set_blocking( $handle, 0 );
@@ -263,8 +263,8 @@
 			);
 		}
 
-		$strResponse  = '';
-		$bodyStarted  = false;
+		$str_response = '';
+		$body_started = false;
 		$keep_reading = true;
 		$block_size   = 4096;
 
@@ -296,13 +296,13 @@
 
 			while ( ! feof( $handle ) && $keep_reading ) {
 				$block = fread( $handle, $block_size );
-				if ( ! $bodyStarted ) {
-					$strResponse .= $block;
-					if ( strpos( $strResponse, "\r\n\r\n" ) ) {
-						$processed_response = WP_Http::processResponse( $strResponse );
-						$bodyStarted        = true;
+				if ( ! $body_started ) {
+					$str_response .= $block;
+					if ( strpos( $str_response, "\r\n\r\n" ) ) {
+						$processed_response = WP_Http::processResponse( $str_response );
+						$body_started       = true;
 						$block              = $processed_response['body'];
-						unset( $strResponse );
+						unset( $str_response );
 						$processed_response['body'] = '';
 					}
 				}
@@ -338,23 +338,23 @@
 			$header_length = 0;
 
 			while ( ! feof( $handle ) && $keep_reading ) {
-				$block        = fread( $handle, $block_size );
-				$strResponse .= $block;
+				$block         = fread( $handle, $block_size );
+				$str_response .= $block;
 
-				if ( ! $bodyStarted && strpos( $strResponse, "\r\n\r\n" ) ) {
-					$header_length = strpos( $strResponse, "\r\n\r\n" ) + 4;
-					$bodyStarted   = true;
+				if ( ! $body_started && strpos( $str_response, "\r\n\r\n" ) ) {
+					$header_length = strpos( $str_response, "\r\n\r\n" ) + 4;
+					$body_started  = true;
 				}
 
 				$keep_reading = (
-					! $bodyStarted
+					! $body_started
 					|| ! isset( $parsed_args['limit_response_size'] )
-					|| strlen( $strResponse ) < ( $header_length + $parsed_args['limit_response_size'] )
+					|| strlen( $str_response ) < ( $header_length + $parsed_args['limit_response_size'] )
 				);
 			}
 
-			$processed_response = WP_Http::processResponse( $strResponse );
-			unset( $strResponse );
+			$processed_response = WP_Http::processResponse( $str_response );
+			unset( $str_response );
 
 		}
 
Index: src/wp-includes/category-template.php
===================================================================
--- src/wp-includes/category-template.php	(revision 52801)
+++ src/wp-includes/category-template.php	(working copy)
@@ -103,12 +103,12 @@
  *
  * @since 0.71
  *
- * @param int $cat_ID Category ID.
+ * @param int $cat_id Category ID.
  * @return string|WP_Error Category name on success, WP_Error on failure.
  */
-function get_the_category_by_ID( $cat_ID ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
-	$cat_ID   = (int) $cat_ID;
-	$category = get_term( $cat_ID );
+function get_the_category_by_ID( $cat_id ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
+	$cat_id   = (int) $cat_id;
+	$category = get_term( $cat_id );
 
 	if ( is_wp_error( $category ) ) {
 		return $category;