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

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

Follow-up to [61436], [61435], [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@61442 602fd350-edb4-49c9-b593-d223f7449a82

Author: westonruter

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

@@ -450,7 +450,7 @@ public function do_item( $handle, $group = false ) {
 		}
 
 		// Determine fetchpriority.
-		$original_fetchpriority = isset( $obj->extra['fetchpriority'] ) ? $obj->extra['fetchpriority'] : null;
+		$original_fetchpriority = $obj->extra['fetchpriority'] ?? null;
 		if ( null === $original_fetchpriority || ! $this->is_valid_fetchpriority( $original_fetchpriority ) ) {
 			$original_fetchpriority = 'auto';
 		}

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

@@ -203,7 +203,7 @@ public function do_item( $handle, $group = false ) {
 		}
 
 		$rel   = isset( $obj->extra['alt'] ) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
-		$title = isset( $obj->extra['title'] ) ? $obj->extra['title'] : '';
+		$title = $obj->extra['title'] ?? '';
 
 		$tag = sprintf(
 			"<link rel='%s' id='%s-css'%s href='%s' media='%s' />\n",
@@ -230,7 +230,7 @@ public function do_item( $handle, $group = false ) {
 
 		if ( 'rtl' === $this->text_direction && isset( $obj->extra['rtl'] ) && $obj->extra['rtl'] ) {
 			if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
-				$suffix   = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
+				$suffix   = $obj->extra['suffix'] ?? '';
 				$rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $src, $ver, "$handle-rtl" ) );
 			} else {
 				$rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );

src/wp-includes/global-styles-and-settings.php

@@ -283,7 +283,7 @@ function wp_add_global_styles_for_blocks() {
 
 		if ( $can_use_cached ) {
 			// Use the block name as the key for cached CSS data. Otherwise, use a hash of the metadata.
-			$cache_node_key = isset( $metadata['name'] ) ? $metadata['name'] : md5( wp_json_encode( $metadata ) );
+			$cache_node_key = $metadata['name'] ?? md5( wp_json_encode( $metadata ) );
 
 			if ( isset( $cached['blocks'][ $cache_node_key ] ) ) {
 				$block_css = $cached['blocks'][ $cache_node_key ];

src/wp-includes/script-loader.php

@@ -1984,7 +1984,7 @@ function wp_localize_community_events() {
 
 	$user_id            = get_current_user_id();
 	$saved_location     = get_user_option( 'community-events-location', $user_id );
-	$saved_ip_address   = isset( $saved_location['ip'] ) ? $saved_location['ip'] : false;
+	$saved_ip_address   = $saved_location['ip'] ?? false;
 	$current_ip_address = WP_Community_Events::get_unsafe_client_ip();
 
 	/*