Online PHP editor | output for TSAVi

@ 2021-09-19T08:36:07Z

<?php

function isWeekend($date) 
{
    if ($date instanceof DateTime) {
        $date = DateTimeImmutable::createFromMutable($date);
    }

    return $date->setTime(0,0,0) != $date->modify('this weekday');
}

function isWeekendUnixTimestamp($dateValue)
{
    return date('Yz', strtotime($dateValue)) != date('Yz', strtotime($dateValue . ' this weekday'));
}

echo 'DateTimeInterface Comparison:' . PHP_EOL;

$sunday = new DateTimeImmutable('Sunday');
$periods = new DatePeriod($sunday, new DateInterval('P1D'), 6);
foreach ($periods as $date) {
    echo $date->format('D') . ' is' . (isWeekend($date) ? '' : ' not') . ' a weekend' . PHP_EOL;
}

echo  PHP_EOL . 'String Comparison:' . PHP_EOL;
foreach ($periods as $date) {
    echo $date->format('D')  . ' is' . (isWeekendUnixTimestamp($date->format('Y-m-d')) ? '' : ' not') . ' a weekend' . PHP_EOL;
}

Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: DateTimeInterface Comparison: Sun is a weekend Mon is not a weekend Tue is not a weekend Wed is not a weekend Thu is not a weekend Fri is not a weekend Sat is a weekend String Comparison: Sun is a weekend Mon is not a weekend Tue is not a weekend Wed is not a weekend Thu is not a weekend Fri is not a weekend Sat is a weekend
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 DateTimeInterface Comparison: Sun is a weekend Mon is not a weekend Tue is not a weekend Wed is not a weekend Thu is not a weekend Fri is not a weekend Sat is a weekend String Comparison: Sun is a weekend Mon is not a weekend Tue is not a weekend Wed is not a weekend Thu is not a weekend Fri is not a weekend Sat is a weekend
Output for 4.3.0: Parse error: parse error, unexpected T_STRING in /in/TSAVi on line 5
Process exited with code 255.

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