Fatal error: Uncaught Error: Call to undefined function logSQL() in /home/icotfeels/readnest.jp/public_html/library/database_pdo.php:37 Stack trace: #0 /home/icotfeels/readnest.jp/public_html/search_book_by_tag.php(61): DB_PDO->getOne('\n SELECT COU...') #1 {main} thrown in /home/icotfeels/readnest.jp/public_html/library/database_pdo.php on line 37