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<?php $a = new DateTime("2017-11-17 22:05:26.000000"); $b = new DateTime("2017-04-03 22:29:15.079459"); $diff = $a->diff($b); var_dump($diff->h);
based on mMdNK

Abusive script

This script was stopped while abusing our resources

Output for 5.4.24 - 5.4.45, 5.5.8 - 7.1.7
int(-1)
Output for 5.3.0 - 5.4.23, 5.5.0 - 5.5.7
int(23)
Output for 5.2.0 - 5.2.17
Fatal error: Call to undefined method DateTime::diff() in /in/6OOuG on line 6
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/6OOuG on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/6OOuG on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/6OOuG on line 3