// Verify the integrity of the cached PHP code
$keyedHash = substr( $code, 0, 64 );
$code = substr( $code, 64 );
if ( $keyedHash !== hash_hmac( 'sha256', $code, $secretKey ) ) {
// Verify the integrity of the cached PHP code
$keyedHash = substr( $code, 0, 64 );
$code = substr( $code, 64 );
if ( $keyedHash !== hash_hmac( 'sha256', $code, $secretKey ) ) {