Specific Input Validation

In default, PHP is not provide pre-devined function to handle specific input, like Email Address, IP, and Host name. Beside that, you can creat patern with using regular expression.

To do specific input validation, You need to use ereg() or eregi() . Both function have same functionality, but ereg() using by case-sensitive patern, while eregi() is case-insensitive.

Example:
/** Function for date verification, with format dd-mm-yyyy, @return true if correct, false if wrong **/

function isTgl($tgl) {
if (ereg("^([0-9]{1,2})-([0-9]{1,2})-([0-9]{4}$",$tgl, $part) && checkdate($part[2], $part[1], $part[3])) { return true; } else { return false; }}

/*function to email verification */
function isEmail($str) {
return(ereg('^[^@]+@([a-z\-]+\.)+[a-z]{2,4}$', $str)); }

if (isset($_POST['oke'])) {
if (isTgl($_POST['tgl']) && isEmail($_POST['email'])) {
echo 'input valid
';
echo $_POST['tgl']. '
' .$_POST['email'];
}else {
echo 'input tidak valid';
}
}

checkdate() function will be return true value if month value is 1-12, year 1-32767 and day value depend on year and month (from Gregorian calender).