Online PHP editor | output for 7JDgp

@ 2020-09-05T00:30:44Z

<?php

$fillStart = new DateTime("2019-07-23 00:15:00");
$fillEnd = new DateTime("2019-09-23 13:00:00");
$gapStart = new DateTime("2019-05-23 00:15:00");
$gapEnd = new DateTime("2019-06-23 13:00:00");

//

// being with the original start
$fillStartModified = clone $fillStart;

// move to the next weekday and time
$wdtStart = $gapStart->format("l H:i:s");
if ($fillStartModified->format("l H:i:s") != $wdtStart) {
    $fillStartModified->modify("next {$wdtStart}");
}

// get the duration, minus a bit so we can do a "next <day>" after
$days = $gapStart->diff($gapEnd)->days - 1;

// get the weekday and time
$wdtEnd = $gapEnd->format("l H:i:s");

// update
$fillEndModified = clone $fillStartModified;
$fillEndModified->modify("+${days} days");
$fillEndModified->modify("next {$wdtEnd}");

$f = "l Y-m-d H:i:s";
printf("Fill %28s -> %28s\n", $fillStart->format($f), $fillEnd->format($f));
printf("Gap  %28s -> %28s\n", $gapStart->format($f), $gapEnd->format($f));
printf("New  %28s -> %28s\n", $fillStartModified->format($f), $fillEndModified->format($f));

Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/7JDgp on line 27 Fill Tuesday 2019-07-23 00:15:00 -> Monday 2019-09-23 13:00:00 Gap Thursday 2019-05-23 00:15:00 -> Sunday 2019-06-23 13:00:00 New Thursday 2019-07-25 00:15:00 -> Sunday 2019-08-25 13:00:00
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 Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/7JDgp on line 27 Fill Tuesday 2019-07-23 00:15:00 -> Monday 2019-09-23 13:00:00 Gap Thursday 2019-05-23 00:15:00 -> Sunday 2019-06-23 13:00:00 New Thursday 2019-07-25 00:15:00 -> Sunday 2019-08-25 13:00:00
Output for 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: Fill Tuesday 2019-07-23 00:15:00 -> Monday 2019-09-23 13:00:00 Gap Thursday 2019-05-23 00:15:00 -> Sunday 2019-06-23 13:00:00 New Thursday 2019-07-25 00:15:00 -> Sunday 2019-08-25 13:00:00

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