Online PHP editor | output for BhrL9

@ 2017-06-28T12:30:51Z

<?php

    $date = new DateTime('2017-06-28');
    var_dump($date->format('Y-m-d'));
    
    $test = floor(1 / 3);
    var_dump($test);
    $date->setDate($date->format('Y'), floor(($date->format('m')-1) / 3) * 3 + 2, 1);
    var_dump($date->format('Y-m-d'));

    
    $date = clone($date);
    $date->modify('+3 month -1 day');  
    var_dump($date->format('Y-m-d'));
    
    
    $date->setDate($date->format('Y'), 1, 1);  
    var_dump($date->format('Y-m-d'));
    $date->setDate($date->format('Y'), 12, 31);  
    var_dump($date->format('Y-m-d'));

Output for 7.0.0 - 7.0.20, 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(10) "2017-06-28" float(0) string(10) "2017-05-01" string(10) "2017-07-31" string(10) "2017-01-01" string(10) "2017-12-31"
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(10) "2017-06-28" float(0) string(10) "2017-05-01" string(10) "2017-07-31" string(10) "2017-01-01" string(10) "2017-12-31"

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