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run code in 150+ php & hhvm versions
Bugs & Features
<?php function getDiffInHours(\DateTime $earlierDate, \DateTime $laterDate) { $utc = new \DateTimeZone('UTC'); //First convert to UTC to avoid missing hours due to DST etc $earlierDate->setTimezone($utc); $laterDate->setTimezone($utc); $diff = $earlierDate->diff($laterDate); return 24 * $diff->days + $diff->h; } $hours = getDiffInHours(new \DateTime(), new \DateTime('+ 31 hours')); var_dump($hours);
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.1 - 7.1.0
int(31)
Output for 7.0.0
int(30)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 4 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 11 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 11 Fatal error: Call to undefined method DateTime::diff() in /in/M8lGt on line 8
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 4 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 11 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 11 Fatal error: Class 'DateTime' not found in /in/M8lGt on line 11
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/M8lGt on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Parse error: parse error, unexpected T_STRING, expecting ')' in /in/M8lGt on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/M8lGt on line 2 Parse error: parse error, expecting `')'' in /in/M8lGt on line 2
Process exited with code 255.