3v4l.org

run code in 300+ PHP versions simultaneously
<?php function daysUntil($start, $end) { $lookup = ['Sunday' => 0, 'Monday' => 1, 'Tuesday' => 2, 'Wednesday' => 3, 'Thursday' => 4, 'Friday' => 5, 'Saturday' => 6]; $days = $lookup[$end] - $lookup[$start] + ($lookup[$end] <= $lookup[$start] ? 7 : 0); return "{$days} days from {$start} to {$end}\n"; } echo daysUntil('Wednesday', 'Saturday'); // Thursday, Friday, Saturday echo daysUntil('Monday', 'Friday'); // Tuesday, Wednesday, Thursday, Friday echo daysUntil('Thursday', 'Thursday'); // [assumed next week] echo daysUntil('Friday', 'Monday'); // Saturday, Sunday, Monday echo daysUntil('Saturday', 'Sunday'); // Sunday echo daysUntil('Sunday', 'Saturday'); // Monday, Tuesday, Wednesday, Thursday, Friday, Saturday echo daysUntil('Sunday', 'Wednesday'); // Monday, Tuesday, Wednesday
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
3 days from Wednesday to Saturday 4 days from Monday to Friday 7 days from Thursday to Thursday 3 days from Friday to Monday 1 days from Saturday to Sunday 6 days from Sunday to Saturday 3 days from Sunday to Wednesday
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
preferences:
129.84 ms | 407 KiB | 5 Q