使用的preg_match檢查電子郵件域

Question

如何修改下面的preg_match功能，讓所有的電子郵件地址與harvard.edu電子郵件地址結尾，而不是隻有那些擁有@ college.harvard.edu？

if(!preg_match("/@college\.harvard\.edu$/", $_POST["username"])) 
    { 
     apologize("You must provide a Harvard email to register."); 
    } 

Answer 1

if(!preg_match("/@.*harvard\.edu$/", $_POST["username"])) 
{ 
    apologize("You must provide a Harvard email address to register."); 
}