diff --git a/src/wp-includes/compat.php b/src/wp-includes/compat.php
index 696e2b8ea9..0ccee2d498 100644
--- a/src/wp-includes/compat.php
+++ b/src/wp-includes/compat.php
@@ -450,7 +450,7 @@ if ( ! function_exists( 'array_replace_recursive' ) ) :
 	 *
 	 * @since 4.5.3
 	 *
-	 * @see http://php.net/manual/en/function.array-replace-recursive.php#109390
+	 * @see https://secure.php.net/manual/en/function.array-replace-recursive.php#109390
 	 *
 	 * @param  array $base         Array with keys needing to be replaced.
 	 * @param  array $replacements Array with the replaced keys.
diff --git a/src/wp-includes/load.php b/src/wp-includes/load.php
index 11c36fda97..c81cd9b055 100644
--- a/src/wp-includes/load.php
+++ b/src/wp-includes/load.php
@@ -981,8 +981,8 @@ function is_ssl() {
  * @since 2.3.0
  * @since 4.6.0 Moved from media.php to load.php.
  *
- * @link http://php.net/manual/en/function.ini-get.php
- * @link http://php.net/manual/en/faq.using.php#faq.using.shorthandbytes
+ * @link https://secure.php.net/manual/en/function.ini-get.php
+ * @link https://secure.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
  *
  * @param string $value A (PHP ini) byte value, either shorthand or ordinary.
  * @return int An integer byte value.
@@ -1008,7 +1008,7 @@ function wp_convert_hr_to_bytes( $value ) {
  *
  * @since 4.6.0
  *
- * @link http://php.net/manual/en/function.ini-get-all.php
+ * @link https://secure.php.net/manual/en/function.ini-get-all.php
  *
  * @param string $setting The name of the ini setting to check.
  * @return bool True if the value is changeable at runtime. False otherwise.
diff --git a/tests/phpunit/tests/mail.php b/tests/phpunit/tests/mail.php
index 1df6ea6b8a..9f9dd01a93 100644
--- a/tests/phpunit/tests/mail.php
+++ b/tests/phpunit/tests/mail.php
@@ -286,11 +286,11 @@ class Tests_Mail extends WP_UnitTestCase {
 	 * > If an entity is of type "multipart" the Content-Transfer-Encoding is
 	 * > not permitted to have any value other than "7bit", "8bit" or
 	 * > "binary".
-	 * http://tools.ietf.org/html/rfc2045#section-6.4
+	 * https://tools.ietf.org/html/rfc2045#section-6.4
 	 *
 	 * > "Content-Transfer-Encoding: 7BIT" is assumed if the
 	 * > Content-Transfer-Encoding header field is not present.
-	 * http://tools.ietf.org/html/rfc2045#section-6.1
+	 * https://tools.ietf.org/html/rfc2045#section-6.1
 	 *
 	 * @ticket 28039
 	 */