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<?php if (!class_exists('DateTime') ) { die('Feature not available yet'); } echo "Same date:\n"; $a = new DateTime('2015-01-31 01:23:45 UTC'); $b = new DateTime('2015-01-31 02:23:45 Europe/Paris'); var_dump($a, $b, $a<$b, $a==$b, $a>$b); echo "\n"; echo "First greater than second:\n"; $a = new DateTime('2015-01-31 01:23:46 UTC'); $b = new DateTime('2015-01-31 02:23:45 Europe/Paris'); var_dump($a, $b, $a<$b, $a==$b, $a>$b); echo "\n"; echo "First less than second:\n"; $a = new DateTime('2015-01-31 01:23:45 UTC'); $b = new DateTime('2015-01-31 02:23:46 Europe/Paris'); var_dump($a, $b, $a<$b, $a==$b, $a>$b);
Output for 5.4.30 - 5.4.45, 5.5.14 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Same date: object(DateTime)#1 (3) { ["date"]=> string(26) "2015-01-31 01:23:45.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(26) "2015-01-31 02:23:45.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(12) "Europe/Paris" } bool(false) bool(true) bool(false) First greater than second: object(DateTime)#3 (3) { ["date"]=> string(26) "2015-01-31 01:23:46.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#1 (3) { ["date"]=> string(26) "2015-01-31 02:23:45.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(12) "Europe/Paris" } bool(false) bool(false) bool(true) First less than second: object(DateTime)#2 (3) { ["date"]=> string(26) "2015-01-31 01:23:45.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#3 (3) { ["date"]=> string(26) "2015-01-31 02:23:46.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(12) "Europe/Paris" } bool(true) bool(false) bool(false)
Output for 5.4.0 - 5.4.29, 5.5.0 - 5.5.13
Same date: object(DateTime)#1 (3) { ["date"]=> string(19) "2015-01-31 01:23:45" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(19) "2015-01-31 02:23:45" ["timezone_type"]=> int(3) ["timezone"]=> string(12) "Europe/Paris" } bool(false) bool(true) bool(false) First greater than second: object(DateTime)#3 (3) { ["date"]=> string(19) "2015-01-31 01:23:46" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#1 (3) { ["date"]=> string(19) "2015-01-31 02:23:45" ["timezone_type"]=> int(3) ["timezone"]=> string(12) "Europe/Paris" } bool(false) bool(false) bool(true) First less than second: object(DateTime)#2 (3) { ["date"]=> string(19) "2015-01-31 01:23:45" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#3 (3) { ["date"]=> string(19) "2015-01-31 02:23:46" ["timezone_type"]=> int(3) ["timezone"]=> string(12) "Europe/Paris" } bool(true) bool(false) bool(false)

preferences:
107.36 ms | 411 KiB | 5 Q