note 129708 added to datetime.formats

The year-only format is a potential issue that could cause problems for you. <?php echo (new DateTime('1994'))->format('Y-m-d'); // Outputs today's date in the year 1984, e.g. "1994-08-15" echo (new DateTime('2004'))->format('Y-m-d'); // Outputs today's date in the *current* year, e.g. "2024-08-15" ?> This is because, as noted above in the documentation, 2004 gets interpreted as a time, e.g. 20:04, rather than as a year. Even though 1994 is interpreted as a year. One solution is to add ' T' to the end of the string: <?php echo (new DateTime('1994 T'))->format('Y-m-d'); // "1994-08-15" echo (new DateTime('2004 T'))->format('Y-m-d'); // "2004-08-15" ?> Another would be to add an arbitrary time to the beginning of the string: <?php echo (new DateTime('11:00 1994'))->format('Y-m-d'); // "1994-08-15" echo (new DateTime('11:00 2004'))->format('Y-m-d'); // "2004-08-15" ?> ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.84.18 (proxied: 163.116.147.31) ---- Manual Page -- https://php.net/manual/en/datetime.formats.php Edit -- https://main.php.net/note/edit/129708 Del: integrated -- https://main.php.net/note/delete/129708/integrated Del: useless -- https://main.php.net/note/delete/129708/useless Del: bad code -- https://main.php.net/note/delete/129708/bad+code Del: spam -- https://main.php.net/note/delete/129708/spam Del: non-english -- https://main.php.net/note/delete/129708/non-english Del: in docs -- https://main.php.net/note/delete/129708/in+docs Del: other reasons-- https://main.php.net/note/delete/129708 Reject -- https://main.php.net/note/reject/129708 Search -- https://main.php.net/manage/user-notes.php