3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($i = 1; $i <= 30; $i++) { $input = new \DateTime('2017-07-'.$i); $firstDayOfMonth = new \DateTime($input->format('Y-m-01')); $order = (int)($input->format('n') / 7) + 1; if (($input->format('N') % 7) <= ($firstDayOfMonth->format('N') % 7)) $order++; var_dump($order.' '.$input->format('l')); }
Output for 5.6.0 - 5.6.40, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday"
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday" string(9) "3 Monday" string(10) "3 Tuesday" string(12) "3 Wednesday" string(11) "3 Thursday" string(9) "3 Friday" string(11) "3 Saturday" string(9) "3 Sunday"

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