On Thu, May 17, 2012 at 3:37 PM, Jim Giner <jim.giner@xxxxxxxxxxxxxxxxxx> wrote:
> ok - finally had to come up with my own regexp - and am failing.
>
> Trying to validate an input of a time value in the format hh:mm, wherein
> I'll accept anything like the following:
> hmm
> hhmm
> h:mm
> hh:mm
>
> in a 12 hour format. My problem is my test is ok'ing an input of 1300.
>
> Here is my test:
>
> if (0 == preg_match("/([0][1-9]|[1][0-2]|[1-9]):[0-5][0-9]/",$t))
> return true;
> else
> return false;
>
> Can someone help me correct my regexp?
If the ":" separator is inserted before the regex check, the following
should suffice:
'/^(0?[1-9]|1[12]):([0-5][0-9])$/'
Test script:
<?php
$testvalues=array("1:00","2:30","12:50","11:00",
"13:00","1:69",
"01:00","12:59pm","00:40","00:00","a:00","00");
$valid_re = '/^(0?[1-9]|1[12]):([0-5][0-9])$/';
foreach ($testvalues as $time) {
if (preg_match($valid_re,$time)) {
echo "$time passes\n";
} else {
echo "$time fails\n";
}
}
Produces output:
php twelvehourtimecheck.php
1:00 passes
2:30 passes
12:50 passes
11:00 passes
13:00 fails
1:69 fails
01:00 passes
12:59pm fails
00:40 fails
00:00 fails
a:00 fails
00 fails
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