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<?php $range1 = '2019-01-01 - 2019-05-20'; $range2 = '2019-01-06 - 2019-05-20'; list($start, $end) = explode(' - ', $range1); $start1 = new DateTime($start); $end1 = new DateTime($end); list($start, $end) = explode(' - ', $range2); $start2 = new DateTime($start); $end2 = new DateTime($end); if ($end1 > $start1) { $overlap = $end1->diff(min($start2, $end2)); } else { $overlap = $start1->diff(min($start2, $end2)); } echo "overlap is " . ($overlap->format('%a') + 1) . " days";
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
overlap is 135 days
Output for 5.2.2 - 5.2.17
Fatal error: Call to undefined method DateTime::diff() in /in/AlhZB on line 11
Process exited with code 255.
Output for 5.2.0 - 5.2.1
Fatal error: Call to undefined method DateTime::diff() in /in/AlhZB on line 14
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/AlhZB on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/AlhZB on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/AlhZB on line 5
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