PHP - How To Convert Datetime To Another Datetimezone In Php???

It is my belief that when storing time in the DB, it should always be at UTC.  Agree?  My question is whether one should work with DateTimes with a specific time zone or only do so when displaying the time to the user?

For example, if I have multiple users which have a timezone string property based on their physical location as well as a datatime property when some event occurred for the given user, and need to implement some logic if the event occurred more than a given duration from the current time, which of the following approaches should be used?

$currentTime = new DateTimeImmutable();
$userEventTime = new DateTime($queryResults['theEventField']);
if($currentTime->sub(new DateInterval('P10D')) < $userEventTime) {
    //Display time to the user
    $displayEventTime = new DateTime('@'.$userEventTime->getTimestamp(), new DateTimeZone($queryResults['userTimeZone']))->format('Y-m-d H:i:sP');
}

 

$currentTime = new DateTimeImmutable('now', new DateTimeZone($queryResults['userTimeZone']));
$userEventTime = new DateTime($queryResults['theEventField'], new DateTimeZone($queryResults['userTimeZone']));
if($currentTime->sub(new DateInterval('P10D')) < $userEventTime) {
    //Display time to the user
    $displayEventTime = $userEventTime->format('Y-m-d H:i:sP');
}

 

 

Dear all,

how can I convert a string "yyyy-mm-dd hh:mm" into a really datetime value with php?

thanks!

I have multiple datetimes. The format is dd-mm-yy, hh:mm. I want to insert it into a table using mysql. However mysql format is yy-mm-dd, hh:mm:ss. How can i do it and what type should i use (datetime?timestamp?).
Thanks for your help!!

Code: [Select]
<?php
$myServer = "202.138.125.155";
$myUser = "micro_fms";
$myPass = "micro_fms*#$";
$myDB = "micro_fms"; 

//create an instance of the  ADO connection object
$conn = new COM("ADODB.Connection")or die("Cannot start ADO");

//define connection string, specify database driver
$connStr = "PROVIDER='SQLOLEDB'; SERVER=".$myServer.";UID=".$myUser.";PWD=".$myPass.";DATABASE=".$myDB; 

//Open the connection to the database
$conn->open($connStr);

//$table_name=$_GET['Device'];
$table_data=$_GET['Data'];
$data=(explode(",",$table_data));

$table_name=$data[0];
$speed=$data[1];
$time=$data[2];
$date=$data[3];
$lat=$data[4];
$long=$data[5];
//$newdate = substr($date,6,2) . "-" . substr($date,0,2) . "-" substr($date,3,2);
$datetime=$date.$time;


$new_lat = substr($lat,0,2).'.'.substr($lat,2);
$new_long = substr($long,0,2).'.'.substr($long,2);

echo $table_name."<br>";
echo $speed."<br>";
echo $new_lat."<br>";
echo $new_long."<br>";
echo $datetime."<br>";

$query="insert into $table_name (DeviceNumber,Speed,dtDateTime,Latitude,Longitude)values('$table_name','$speed','$datetime','$new_lat','$new_long')";


//execute the SQL statement and return records
$rs = $conn->execute($query);
if($rs)
{
echo 'Values Inserted';
}
else
{
echo "faile";
}
?>


Hi friends...
I have two variables ($date and $time). I concat these two strings and make a new variable called "$datetime". Now in above code I want to insert it into table but I got the following error. Code: [Select]
Fatal error: Uncaught exception 'com_exception' with message '<b>Source:</b> Microsoft OLE DB Provider for SQL Server<br/><b>Description:</b> Conversion failed when converting datetime from character string.' in C:\wamp\www\FMS\fms.php:44 Stack trace: #0 C:\wamp\www\FMS\fms.php(44): com->execute('insert into A00...') #1 {main} thrown in C:\wamp\www\FMS\fms.php on line 44
In my database, data type of column in which I want to insert is Date time stamp though I have string type ($datetime) variable.
I think I have to convert this $datetime variable string to "DateTime type first but don't have any idea about it.
Please help??/
Thanks in advance....

This code gives me 1969-12-31 18:33:30
Code: [Select]
<?=date('d M Y', $val['Created']);?> 
and this one gives me 2010-11-04 03:52:54  WHICH IS THE RIGHT ONE - BUT i need to format as above.
Code: [Select]
<?=$val['Created']?>
this happens on the same line of code.

What is wrong?