Online PHP editor | output for 7sCi5

@ 2021-03-22T19:18:25Z

<?php

function diff($a, $b) {
    static $FMT = "Y-m-d H:i:s P (\D\S\T=I)";
    printf("%20s: %s -> %s\n", $a->format("e"), $a->format($FMT), $b->format($FMT));
}

$havana1 = new DateTime("@1615611600");
$havana1->setTimezone(new DateTimeZone("America/Havana"));
$havana2 = (clone $havana1)->add(new DateInterval("P1D"));
diff($havana1, $havana2);

$tehran1 = new DateTime("@1616272200");
$tehran1->setTimezone(new DateTimeZone("Asia/Tehran"));
$tehran2 = (clone $tehran1)->add(new DateInterval("P1D"));
diff($tehran1, $tehran2);

Output for 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 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12: America/Havana: 2021-03-13 00:00:00 -05:00 (DST=0) -> 2021-03-14 01:00:00 -04:00 (DST=1) Asia/Tehran: 2021-03-21 00:00:00 +03:30 (DST=0) -> 2021-03-22 01:00:00 +04:30 (DST=1)
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 America/Havana: 2021-03-13 00:00:00 -05:00 (DST=0) -> 2021-03-14 01:00:00 -04:00 (DST=1) Asia/Tehran: 2021-03-21 00:00:00 +03:30 (DST=0) -> 2021-03-22 01:00:00 +04:30 (DST=1)

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