Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /home/bibliomed/depo/functions_siteb.php:1978 Stack trace: #0 /home/bibliomed/depo/functions_siteb.php(1978): date('Y-m-d', '') #1 /home/bibliomed/public_html/index.php(118): google_scholar_meta('185693', '137') #2 {main} thrown in /home/bibliomed/depo/functions_siteb.php on line 1978