PHP form validation and form to mail

PHP FORM VALIDATION AND FORM TO EMAIL CODING: We have a webform designed - [login to view URL] - due to the site being hosted on Linux we will need PHP scripting to validate the form fields and then send the form data, once validated, to a specific email address. On page PHP validation messages for required/incomplete form field entries. Every box is required to be completed on this form. Email fields need to ensure they are identical entries as well as containing a valid email. Telephone number field needs to just contain digits and be 11 numbers long. On successful completion of all form elements form script needs to send an email to a specified address and refer user to [login to view URL] which will reside in root folder.