Time(only & not date) comparison - php

Question

I need to compare two different times. Both of the format:
Hour:Min:Sec
None of them is picked up from current time. So, no strtotime or DateTime. I don't want the date to be involved in any way in the comparison.
Every question here ends with strtotime as the answer.
What I want is to compare these two times out of which one is getting picked from DataBase(is of the type time) & one I'm manually giving as string.
For eg: $A="00:00:00"(if can be stored otherwise kindly do tell).
If there is any way to do this,kindly do tell me?Thnxx in advance...

Answer 1

You could use a function that convert your times into seconds and then do a comparison based on the results
function getTimeInSeconds($hours, $minutes, $seconds) {
$totalSeconds = 0;
//Add the numner of hours in seconds
$totalSeconds += ($hours * 60) * 60;
//Add the number of minutes in seconds
$totalSeconds += $minutes * 60;
//Add seconds
$totalSeconds += $seconds;
return $totalSeconds;
}
$firsttime = getTimeInSeconds(8, 30, 14);
$secondtime = getTimeInSeconds(10, 15, 06);
//If second time is later than first time
if($secondtime > $firsttime)
{
}
//If first time is later than second time
if($firsttime > $secondtime)
{
}

Answer 2

If time is in 24 hour format you can simply compare it by string comparison
$A="00:00:00"
$B="13:00:00"
if ($A > $B) {
// do stuff
}

Answer 3

if you don't want to use strtotime or DateTime i'm not sure it will gives you correct output cause it will be compare as a string or int values so not possible to calculate exact time so better to use php date and time functions
For eg: $A="00:00:00" (it will be a string value)
so better output will be convert both values using strtotime() and do your stuff

Answer 4

You could just multiply out the seconds and compare them.
$timebits = explode(':',$A);
$secondsDB = $timebits[2] + timebits[1]*60 + $timebits[0]*60*60
and then compare to your manual time in seconds.

Answer 5

You can use CAST( ) function in mysql query
SELECT * FROM table_name WHERE yourcolumn < CAST('05:00:00' AS time)

Answer 6

If you require to compare if times on format HH:MM:SS are equal or if one is before another and don't want to use strtotime function you should convert all to seconds and compare as numbers.
Simple example:
$a="01:30:08";
$b="02:20:50";
function toseconds($str){
$array = explode(":",$str);
$val = $array[0] * 24 * 60;
$val += $array[1] * 60;
$val += $array[2];
return $val;
}
print toseconds($a); // print a
print " compare to ";
print toseconds($b); // print b
print " ";
if($a > $b){
print "b is before a";
}else if ($b > $a){
print "a is before b";
}else if($b == $a){
print "a and b are the same time";
}