Changeset 51818 for trunk/src/wp-includes/option.php

Timestamp:

09/15/2021 10:18:36 PM (5 years ago)

Author:

hellofromTonya

Message:

Options, Meta APIs: Fix "passing null to non-nullable" deprecations to (get|add|update|delete)_option().

In all four of the get_option(), add_option(), update_option() and delete_option() functions, the $option parameter (i.e. the option name) is passed to the PHP native trim() function without prior input validation.

In PHP 8.1, this could lead to a trim(): Passing null to parameter #1 ($string) of type string is deprecated for each of these functions.

trim():

• expects a text string and is only useful when passed a text string as no other variable type can contain whitespace.
• will always return a string, which means that in practice for any non-string values passed, it would effectively function as a type cast to string.

This commit:

• Adds a check to verify the $option name is a scalar before processing it with trim().
• The "type cast" behavior is maintained.
• If the given $option name is not a scalar, such as null, the fix prevents the PHP 8.1 deprecation notice.
• Tests are added for valid but undesired option names to safeguard against regressions.

This issue is already covered by:

• the existing Tests_Option_Option::test_bad_option_names() test group.
• the new test_valid_but_undesired_option_names() tests.

Follow-up to [13858], [22633], [23510], [25002], [51817].

Props jrf, hellofromTonya, pbearne.
See #53635.

File:

• trunk/src/wp-includes/option.php (modified) (4 diffs)

trunk/src/wp-includes/option.php

@@ -78 +78 @@
         global $wpdb;
 
-        $option = trim( $option );
+        if ( is_scalar( $option ) ) {
+                $option = trim( $option );
+        }
+
         if ( empty( $option ) ) {
                 return false;
@@ -379 +382 @@
         global $wpdb;
 
-        $option = trim( $option );
+        if ( is_scalar( $option ) ) {
+                $option = trim( $option );
+        }
+
         if ( empty( $option ) ) {
                 return false;
@@ -566 +572 @@
         }
 
-        $option = trim( $option );
+        if ( is_scalar( $option ) ) {
+                $option = trim( $option );
+        }
+
         if ( empty( $option ) ) {
                 return false;
@@ -688 +697 @@
         global $wpdb;
 
-        $option = trim( $option );
+        if ( is_scalar( $option ) ) {
+                $option = trim( $option );
+        }
+
         if ( empty( $option ) ) {
                 return false;