Online PHP editor | output for aMlICM

@ 2023-05-28T09:39:01Z

<?php
$year=2021;
$month=7;
$day=5;
$index=-1;
$period='day';

// strtotime test
$dateString = $year . "-" . $month . "-" . $day . " -" . $index . " " . $period;
$timestamp1 = strtotime("{$year}-{$month}-{$day} -{$index} {$period}");
$dateString1 = date('Y-m-d', $timestamp1);

// DateTime test
$dateStamp = new \DateTime("{$year}-{$month}-{$day}");
$dateStamp->modify("-{$index} {$period}");
$timestamp2 = $dateStamp->getTimeStamp();
$dateString2 = date('Y-m-d', $timestamp2);

echo $dateString . PHP_EOL;
echo "strtotime: " . $timestamp1 . "(" . $dateString1 . ")" . PHP_EOL;
echo "DateTime: " . $timestamp2 . "(" . $dateString1 . ")";

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.25 - 8.2.29, 8.3.13 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: 2021-7-5 --1 day strtotime: 1625522400(2021-07-06) DateTime: 1625522400(2021-07-06)
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.2.0 - 8.2.24, 8.3.0 - 8.3.12: 2021-7-5 --1 day strtotime: 1625349600(2021-07-04) DateTime: 1625349600(2021-07-04)

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