diff --git a/src/wp-admin/includes/ajax-actions.php b/src/wp-admin/includes/ajax-actions.php
index 27ec0d875251d..83b682634b075 100644
--- a/src/wp-admin/includes/ajax-actions.php
+++ b/src/wp-admin/includes/ajax-actions.php
@@ -3556,8 +3556,8 @@ function wp_ajax_get_revision_diffs() {
 
 	$return = array();
 
+	// Increase the script timeout limit to allow ample time for diff UI setup.
 	if ( function_exists( 'set_time_limit' ) ) {
-		// Increase the script timeout limit to allow ample time for diff UI setup.
 		set_time_limit( 5 * MINUTE_IN_SECONDS );
 	}
 
diff --git a/src/wp-admin/includes/class-wp-upgrader.php b/src/wp-admin/includes/class-wp-upgrader.php
index a9784682ebb0f..c47773569fc17 100644
--- a/src/wp-admin/includes/class-wp-upgrader.php
+++ b/src/wp-admin/includes/class-wp-upgrader.php
@@ -525,7 +525,11 @@ public function install_package( $args = array() ) {
 		$destination       = $args['destination'];
 		$clear_destination = $args['clear_destination'];
 
-		// Give the upgrade an additional 300 seconds(5 minutes) to ensure the install doesn't prematurely timeout having used up the maximum script execution time upacking and downloading in WP_Upgrader->run.
+		/*
+		 * Give the upgrade an additional 300 seconds (5 minutes) to ensure the install
+		 * doesn't prematurely timeout having used up the maximum script execution time
+		 * upacking and downloading in WP_Upgrader->run().
+		 */
 		if ( function_exists( 'set_time_limit' ) ) {
 			set_time_limit( 300 );
 		}
diff --git a/src/wp-admin/includes/update-core.php b/src/wp-admin/includes/update-core.php
index 297c931bc086b..d5c4385c7e4da 100644
--- a/src/wp-admin/includes/update-core.php
+++ b/src/wp-admin/includes/update-core.php
@@ -970,8 +970,11 @@
 function update_core( $from, $to ) {
 	global $wp_filesystem, $_old_files, $_old_requests_files, $_new_bundled_files, $wpdb;
 
+	/*
+	 * Give core update script an additional 300 seconds (5 minutes)
+	 * to finish updating large files when running on slower servers.
+	 */
 	if ( function_exists( 'set_time_limit' ) ) {
-		// Gives core update script time an additional 300 seconds(5 minutes) to finish updating large files or run on slower servers.
 		set_time_limit( 300 );
 	}
 
diff --git a/src/wp-includes/class-pop3.php b/src/wp-includes/class-pop3.php
index b4eab75044169..aec31dc7f145c 100644
--- a/src/wp-includes/class-pop3.php
+++ b/src/wp-includes/class-pop3.php
@@ -59,8 +59,8 @@ function __construct ( $server = '', $timeout = '' ) {
         if(!empty($timeout)) {
             settype($timeout,"integer");
             $this->TIMEOUT = $timeout;
+            // Extend POP3 request timeout to the specified TIMEOUT property.
             if(function_exists("set_time_limit")){
-                // Extends POP3 request timeout to specified TIMEOUT property.
                 set_time_limit($timeout);
             }
         }
@@ -75,8 +75,8 @@ public function POP3( $server = '', $timeout = '' ) {
 	}
 
     function update_timer () {
+        // Extend POP3 request timeout to the specified TIMEOUT property.
         if(function_exists("set_time_limit")){
-            // Allows additional extension of POP3 request timeout to specified TIMEOUT property when update_timer is called.
             set_time_limit($this->TIMEOUT);
         }
         return true;
diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index d1dacf243e05f..ce37558d047e3 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -3120,8 +3120,8 @@ function pingback( $content, $post ) {
 		$pingback_server_url = discover_pingback_server_uri( $pagelinkedto );
 
 		if ( $pingback_server_url ) {
+			// Allow an additional 60 seconds for each pingback to complete.
 			if ( function_exists( 'set_time_limit' ) ) {
-				// Allows an additional 60 seconds for each pingback to complete.
 				set_time_limit( 60 );
 			}
 
diff --git a/src/wp-includes/deprecated.php b/src/wp-includes/deprecated.php
index 0b16147d5f224..1aaedd0474f7b 100644
--- a/src/wp-includes/deprecated.php
+++ b/src/wp-includes/deprecated.php
@@ -3673,7 +3673,7 @@ function post_permalink( $post = 0 ) {
 function wp_get_http( $url, $file_path = false, $red = 1 ) {
 	_deprecated_function( __FUNCTION__, '4.4.0', 'WP_Http' );
 
-	// Adds an additional 60 seconds to the script timeout to ensure the remote request has enough time.
+	// Add 60 seconds to the script timeout to ensure the remote request has enough time.
 	if ( function_exists( 'set_time_limit' ) ) {
 		@set_time_limit( 60 );
 	}