wp-includes/sodium_compat/src/Core/Util.php:929Calculate $a ^ $b for two strings.
$astring$bstringstring public static function xorStrings($a, $b) { /* Type checks: */ if (!is_string($a)) { throw new TypeError('Argument 1 must be a string'); } if (!is_string($b)) { throw new TypeError('Argument 2 must be a string'); } return (string) ($a ^ $b); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/sodium_compat/src/Core/Util.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.