php


 function is_HTTPS(){  
    if(!isset($_SERVER['HTTPS']))  return FALSE;  
    if($_SERVER['HTTPS'] === 1){  //Apache  
        return TRUE;  
    }elseif($_SERVER['HTTPS'] === 'on'){ //IIS  
        return TRUE;  
    }elseif($_SERVER['SERVER_PORT'] == 443){ //其他  
        return TRUE;  
    }  
    return FALSE;  
}