php - How do two different date/time formats to determine which one is later? -

i'm getting date/time formats compare:

08:18:00 07/11/2013  7/11/2013 9:11:00 

how convert each 1 of them format can write php find out 1 later date/time?

// $time1 in hh:mm:ss mm/dd/yyyy format. $time1 = "08:18:00 07/11/2013";  // $time2 in mm/dd/yyyy hh:mm:ss format. $time2 = "7/11/2013 9:11:00 am";  $time_one = $mytimeconvertdate_time_first($time1); $time_two = $mytimeconvertdate_date_first($time2);  if ($time_two > $time_one) {    echo "time_two later" . "\n"; }  else {    echo "time_one later" . "\n"; } 

i have tried this, second value doesn't contain date info:

<?php date_default_timezone_set('america/new_york');  // $time1 in hh:mm:ss mm/dd/yyyy format. $time1 = "08:18:00 07/11/2013";  // $time2 in mm/dd/yyyy hh:mm:ss format. $time2 = "7/11/2013 9:11:00 am";  $dt1 = datetime::createfromformat("h:i:s m/d/y", $time1); $dt2 = datetime::createfromformat("m/d/y h:i:s", $time2); var_dump($dt1); var_dump($dt2); if ($dt1 < $dt2) echo "the first earlier";  ?> 

the output is:

object(datetime)#1 (3) {   ["date"]=>   string(19) "2013-07-11 08:18:00"   ["timezone_type"]=>   int(3)   ["timezone"]=>   string(16) "america/new_york" } bool(false) 

corrected to:

<?php date_default_timezone_set('america/new_york'); 

// note: "one 24-hour format while other 12-hour am/pm. "

// $time1 in hh:mm:ss mm/dd/yyyy format. $time1 = "08:18:00 07/11/2013";  // $time2 in mm/dd/yyyy hh:mm:ss format.  $time2 = "7/11/2013 9:11:00 am";  $dt1 = datetime::createfromformat("h:i:s m/d/y", $time1); $dt2 = datetime::createfromformat("m/d/y g:i:s a", $time2); var_dump($dt1); var_dump($dt2); if ($dt1 < $dt2) echo "the first earlier" . "\n";  ?>   object(datetime)#1 (3) {   ["date"]=>   string(19) "2013-07-11 08:18:00"   ["timezone_type"]=>   int(3)   ["timezone"]=>   string(16) "america/new_york" } object(datetime)#2 (3) {   ["date"]=>   string(19) "2013-07-11 09:11:00"   ["timezone_type"]=>   int(3)   ["timezone"]=>   string(16) "america/new_york" } first earlier 

use datetime::createfromformat create 2 datetime instances formatted text. can compare instances directly find earlier in time.

$dt1 = datetime::createfromformat("h:i:s m/d/y", $time1); $dt2 = datetime::createfromformat("m/d/y g:i:s a", $time2);  if ($dt1 < $dt2) echo "the first earlier"; // etc