date input validation

[asherinho]

wats up friends?,I am having a problem with validation.I created a form which requires the user to enter date and the date field in the database accepts only these formats year-month-day, year.month.day or year/month/day.Below are the codes i used,the problem is if the user enters the date in either of these format day-month-year, day.month.year or day/month/year the error message is not displayed and the values are sent as null values to the database.Any one to assist me please

 

if(!eregi("^[0-9]+[.\-\/]+[0-9]+[.\-\/]+[0-9]+$",$datesent)){the date format is not one of the recomended which are:- year.month.day/year.month.day/year-month-day</p>"; exit;}