php非空验证

我想说这种方法是不是很常用的非空验证，现在的普遍使用的是javascript来验证非空，但是作为学习php的一些知识点，还是可以看看的。 先来看看commit.php中的方法 ? php $db = mysql_connect ('localhost','root','Ctrip07185419' ); mysql_select_db ('movie

　　我想说这种方法是不是很常用的非空验证，现在的普遍使用的是javascript来验证非空，但是作为学习php的一些知识点，还是可以看看的。

先来看看commit.php中的方法

php 
$db = mysql_connect('localhost','root','Ctrip07185419');
mysql_select_db('moviesite',$db) or die(mysql_error($db));
mysql_query('set names "gb2312"',$db);
?>

php
switch($_GET['action'])
{
    case "add":
    {
        switch($_GET['type'])
        {
            case 'movie':
                $error = array();
                $movie_name = isset($_POST['movie_name']) ? trim($_POST['movie_name']) : '';
                if(empty($movie_name))
                {
                    $error[] = urlencode('Please enter an movie name');
                }
                
                $movie_type = isset($_POST['movie_type']) ? trim($_POST['movie_type']) : '';
                if(empty($movie_type))
                {
                    $error[] = urldecode('Please enter an movie type');
                }
                
                $movie_year = isset($_POST['movie_year']) ? trim($_POST['movie_year']) : '';
                if(empty($movie_year))
                {
                    $error[] = urldecode('Please enter an movie year');
                }
                
                $movie_leadactor = isset($_POST['movie_leadactor']) ? trim($_POST['movie_leadactor']) : '';
                if(empty($movie_leadactor))
                {
                    $error[] = urldecode('Please enter an movie leadactor');
                }
                
                $movie_director = isset($_POST['movie_director']) ? trim($_POST['movie_director']) : '';
                if(empty($movie_director))
                {
                    $error[] = urldecode('Please enter an movie director');
                }
                
                $movie_release = isset($_POST['movie_release']) ? trim($_POST['movie_release']) : '';
                if(empty($movie_release))
                {
                    $error[] = urldecode('Please enter an movie release');
                }
                else if(!preg_match('|^\d{2}-\d{2}-\d{4}$|' , $movie_release))
                {
                    $error[] = urlencode('Please enter a date in dd-mm-yyyy format');
                }
                else
                {
                    list($day, $month, $year) = explode('-', $movie_release);
                    if(!checkdate($month , $day , $year))
                    {
                        $error[] =  urldecode('please enter a validate date');
                    }
                    else
                    {
                        $movie_release = mktime(0, 0, 0, $month, $day, $year);
                    }
                }

                $movie_rating = isset($_POST['movie_rating']) ? trim($_POST['movie_rating']) : '';
                if(empty($movie_rating))
                {
                    $error[] = urldecode('Please enter an movie leadactor');
                }
                else if(!is_numeric($movie_rating))
                {
                    $error[] = urlencode('Please enter a numeric rating');
                }
                else if($movie_rating $movie_rating