Help with regex

[robsim]

Hello,

 

Could someone help me with a regular expression? I ask users to input time in the form HH:MM:SS (e.g 14:32:53 or 0:22:10). So the regex should check that the time has been entered correctly, with ":" and minutes and seconds cannot be bigger than 60. Thanks a lot in advance!

[TeddyKiller]

$date("H:i:s", time());

 

This will display the current time in hours, minutes and seconds.

[Ken2k7]

Perhaps this ...

<?php
$input = "14:32:53";
preg_match("#^((0?[0-9])|(1[0-9])|(2[0-3]))((0?[0-9])|([1-5][0-9]))){2}$#", $input, $match);

 

* not tested, but you get the general idea, right?

[TeddyKiller]

Ah, yeah that could be what ken2K7 put.

I read the initial question wrong.

[Psycho]

I took what Ken2k7 posted and fixed it. This is tested:

 

function validTime($time)
{
    return preg_match("/^((0?[0-9])|(1[0-9])|(2[0-3]))(:[0-5][0-9]){2}$/", $time);
}

 

To be valid the time must follow the following parameters:

 

The beginning must be one of the following

(0-9) (any single digit number)

0(0-9) (0 followed by any single digit number)

1(0-9) (1 followed by any single digit number)

2(0-3) (2 followed by 0, 1, 2 or 3)

 

There must then be a colon followed by

(0-5)(0-9) (first digit a 0, 1, 2, 3, 4, or 5, second digit any number)

 

Then another colon followed by

(0-5)(0-9) (first digit a 0, 1, 2, 3, 4, or 5, second digit any number)

 

One problem with the above is that it accepts 00:00:00 but not 24:00:00. Some people prefer one over the other. If you need to support 24:00:00, then change the regex to this:

 

/^(((0?[0-9])|(1[0-9])|(2[0-3]))(:[0-5][0-9]){2})|(24:00:00)$/