Need help with this form validation

[kevinkhan]

Hi Guys..

 

I have set up a form on my site www.eventpromotion.ie..

 

The thing is i have no form validation

 

i want to get people to enter correct information into each of the fields. Like the name input box i only want to allow them enter max 10 letters for each of the first and second name..

 

for the mobile.. i only want a ten digit number the begins with either 087, 086, 083 or 085...

 

and the email input box i want to format as well..

 

any ideas... for the names i set this up...

 

$fields_with_lengths = array('firstName' => 10);
        foreach($fields_with_lengths as $fieldname => $maxlength)
          {
          if(strlen(trim(mysql_prep($_POST[$fieldname]))) > $maxlength) 
            {
            $errors[] = $fieldname;
            }
          }

 

I set up an error array to extract which fields have errors in them..

 

I need help with the mobile and email field..

 

Thanks