<?php
class valid {
   
   function email($emailaddress) {
  	 preg_match_all("|[a-zA-Z0-9](.*)@[a-zA-Z0-9](.*)\.[a-zA-Z0-9](.*)|",$emailaddress,$out,PREG_SET_ORDER);
	 
	 if(!is_array($out)) { 
		 return 0;
	 }
	 
	 if(!is_array($out[0])) { 
		return 0;
	 }

	 if(sizeof($out[0]) < 4) { 
		 return 0;
	 }
	 return 1;
   } // end of the string function
}
?>