PHP Datetime check date with different format - php

Question

I've got a problem with datetime condition checked.
First, I've a DateTime value that stored in database as 2018-05-08 15:54:40
But, I want to check only date is equal or not.
For example:
$DateInDatabase = 2018-05-08 15:54:40
$DateSpecific = 2018-05-08
if ($DateInDatabase == $DateSpecific) {
......
}
The question is how to check only date in $DateInDatabase

Answer 1

If you are only interested in the year-month-day, my suggestion would be something such as;
// As per comments, the second param in the date function MUST be a UNIX timestamp, so strtotime will resolve this
$dateInDB = date("Y-m-d", strtotime($DateInDatabase)); // format to XXXX-XX-XX
$dateToCheck = date("Y-m-d", strtotime($DateSpecific)); // format to XXXX-XX-XX
if ($dateInDb == $dateToCheck)
{
// They are the same
}
else
{
// The are different
}
As others have said, you can use direct string comparison also;
$DateInDatabase = "2018-05-08 15:54:40";
$DateSpecific = "2018-05-08";
// This function uses the params haystack, needle in that order
if (stristr($DateInDatabase, $DateSpecific))
{
// Match found
}
else
{
// No match found
}

Answer 2

You can use php date method to format date:
$DateInDatabase ='2018-05-08 15:54:40';
$DateSpecific = '2018-05-08';
if (date('Y-m-d', strtotime($DateInDatabase)) == $DateSpecific) {
echo 'ok';
} else {
echo 'not ok';
}
Read more about php date method from here

Answer 3

You can either directly match as string or parse as date and later format as string.
Given that $DateInDatabase = '2018-05-08 15:54:40' and $DateSpecific = '2018-05-08'
if (false !== strpos($DateInDatabase,$DateSpecific)) {
/* matched */
}
OR
$format = 'Ymd';
$DateInDatabase = (new DateTime($DateInDatabase))->format($format);
$DateSpecific = (new DateTime($DateSpecific))->format($format);
if ($DateInDatabase === $DateSpecific) {
/* matched */
}

Answer 4

This will check if your dates are equal. Be aware that PHP's date function has a limit in how far you can go for the year. The minimum is 01-01-1970 and the maximum is 19-01-2038 (d-m-Y format used here). The date is converted to an integer (strtotime). If those numbers are equal, the dates are equal.
$DateInDatabase = '2018-05-08 15:54:40'
$DateSpecific = '2018-05-08'
$newDate1 = date("Y-m-d", strtotime($DateInDatabase));
$newDate2 = date("Y-m-d", strtotime($DateSpecific));
if ($newDate1 == $newDate2) {
//equal
} else {
//not equal
}