counting characters in an array

el_kab0ng

$field should always be 2 numeric characters.

How do I accomplish this check with php?

Rayn

say that again 😕

mrmufin

if(ereg("^[0-9]{2}$",$field)) {
	// $field is 2 numeric characters
}

el_kab0ng

I have a user submitting a date in a 3 part form:

$field1 = $mm
$field2 = $dd
$field3 = $yy

Is there anyway to ensure that mm dd and yy are 2 numeric characters using php? I can use javascript to ensure they are numbers, but I also need to make sure the user enters no less than 2 digits (maxlength is controlled by the input tag, so they can't go beyond 2 characters, but they can screw it up and only put in 1 character). Can php accomplish this?

mrmufin

Why don't you just use the checkdate() function in PHP? This way you don't have to worry about people trying to enter dates like 02/30/02...

RTFM @ www.php.net/manual/en/function.checkdate.php

Mega

RTFM

couldn't agree more

el_kab0ng

maybe because I'm looking for numbers, not actual dates to be inserted?

how does checkdate handle 02/02/02 ? looks to me it just makes sure mm is between 1 and 12. That doesn't prevent users from entering 1, when it should be 01.

Make sense? Or am I reading the manual wrong?

mrmufin

// Will verify that 02/02/02 is a valid date. Try it...
if(checkdate(02,02,02)) {
	echo 'date is valid<br />';
}

However, it will assume that the 'year' is the year 2, not 2002 or 1902... But it will prevent people from entering 02/31/02, which will never be valid.

el_kab0ng

rock! thanks for clearing that up for me.