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<?php if (class_exists('DateTimeImmutable')) { function compareDate(DateTimeImmutable $d1, DateTimeImmutable $d2) { if ($d1 > $d2) { return 1; } if ($d2 > $d1) { return -1; } $utc = new DateTimeZone("UTC"); $d1micro = $d1->setTimeZone($utc)->format('u'); $d2micro = $d2->setTimeZone($utc)->format('u'); echo '$d1 micro = ', $d1micro, PHP_EOL; echo '$d2 micro = ', $d2micro, PHP_EOL; if ($d1micro > $d2micro) { return 1; } if ($d1micro < $d2micro) { return -1; } return 0; } $d1 = new DateTimeImmutable('2012-02-01 00:00:00.123456'); $d2 = new DateTimeImmutable('2012-02-01 00:00:00.023456'); var_dump(compareDate($d1, $d2)); }
Output for 5.6.19 - 5.6.40, 7.0.4 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(1)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.18, 7.0.0 - 7.0.3
$d1 micro = 123456 $d2 micro = 023456 int(1)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/vt5cQ on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/vt5cQ on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/vt5cQ on line 5
Process exited with code 255.

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