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<?php echo 'Number of days in current month: ' . date('t') . "\n"; echo 'Number of days in February this year: ' . date('t', strtotime(date('Y') . '-02-01'));
Output for 7.4.4, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Number of days in current month: 30 Number of days in February this year: 29

preferences:
30.29 ms | 989 KiB | 4 Q