我如何将datetime转换为unix时间戳并将其与php中的其他时间戳进行比较？

Question

I have one page in that I have two textboxes where user will enter unix timestamp and datetime, I have to compare that both timestamp and datetime but in php the timezone giving different timestamp as per time zone so the code doesn't working in all places where time zones are different.

Please help on this I had used..

strtotime(),mktime(),getTimestamp() 

in php,

also used my sql for this..

SELECT UNIX_TIMESTAMP()

but all are giving different time stamps.

$sql = "SELECT UNIX_TIMESTAMP('date time from text box') as timeStampfromdb";
            $result = mysql_query($sql);
            while($row = mysql_fetch_array($result))
            {
                $timeStampFromDateTime = $row["timeStampfromdb"];
            }           
            if($timeStampFromDateTime == timestamp textbox value)
            {
                matched
            }
            else
            {
                not matched
            }

Answer 1

You can set php timezone in php.ini file, for GMT you need "GMT".

You can also try in your code:

echo date('Y-m-d H:i:s T', time()) . "<br>
";
date_default_timezone_set('GMT');
echo date('Y-m-d H:i:s T', time()) . "<br>
";

time() should return the current unix timestamp.