Code Modernization: HTTP: Use null coalescing operator instead of isset() ternaries.

Developed as a subset of #10654
Initially developed in #4886

Follow-up to [61434], [61403], [61433], [61432], [61431], [61430], [61429], [61424], [61404], [61403].

Props costdev, westonruter.
See #58874, #63430.


git-svn-id: https://develop.svn.wordpress.org/trunk@61435 602fd350-edb4-49c9-b593-d223f7449a82

Author: westonruter

src/wp-includes/class-wp-http-cookie.php

@@ -114,7 +114,7 @@ public function __construct( $data, $requested_url = '' ) {
 		if ( isset( $parsed_url['host'] ) ) {
 			$this->domain = $parsed_url['host'];
 		}
-		$this->path = isset( $parsed_url['path'] ) ? $parsed_url['path'] : '/';
+		$this->path = $parsed_url['path'] ?? '/';
 		if ( ! str_ends_with( $this->path, '/' ) ) {
 			$this->path = dirname( $this->path ) . '/';
 		}
@@ -190,12 +190,12 @@ public function test( $url ) {
 
 		// Get details on the URL we're thinking about sending to.
 		$url         = parse_url( $url );
-		$url['port'] = isset( $url['port'] ) ? $url['port'] : ( 'https' === $url['scheme'] ? 443 : 80 );
-		$url['path'] = isset( $url['path'] ) ? $url['path'] : '/';
+		$url['port'] = $url['port'] ?? ( 'https' === $url['scheme'] ? 443 : 80 );
+		$url['path'] = $url['path'] ?? '/';
 
 		// Values to use for comparison against the URL.
-		$path   = isset( $this->path ) ? $this->path : '/';
-		$port   = isset( $this->port ) ? $this->port : null;
+		$path   = $this->path ?? '/';
+		$port   = $this->port ?? null;
 		$domain = isset( $this->domain ) ? strtolower( $this->domain ) : strtolower( $url['host'] );
 		if ( false === stripos( $domain, '.' ) ) {
 			$domain .= '.local';

src/wp-includes/class-wp-http-ixr-client.php

@@ -25,7 +25,7 @@ public function __construct( $server, $path = false, $port = false, $timeout = 1
 			$bits         = parse_url( $server );
 			$this->scheme = $bits['scheme'];
 			$this->server = $bits['host'];
-			$this->port   = isset( $bits['port'] ) ? $bits['port'] : $port;
+			$this->port   = $bits['port'] ?? $port;
 			$this->path   = ! empty( $bits['path'] ) ? $bits['path'] : '/';
 
 			// Make absolutely sure we have a path.

src/wp-includes/class-wp-http.php

@@ -692,7 +692,7 @@ public static function processResponse( $response ) { // phpcs:ignore WordPress.
 
 		return array(
 			'headers' => $response[0],
-			'body'    => isset( $response[1] ) ? $response[1] : '',
+			'body'    => $response[1] ?? '',
 		);
 	}