无法提交表单，请点击第一次验证错误

Question

当我提交我的表单时，我刚刚遇到了我的第一个验证错误。没有数据发布。

我是新来的所有这些stackOverflow的东西和新所有的数据库场景。为了得到我所得到的，我使用了一些图坦卡蒙和书籍。

希望有人能帮助我。

    $itemid = $_GET['page_id'];
$itemid = mysql_real_escape_string($itemid);
    //get data from database that needs editing
    $sql = mysql_query("SELECT * FROM content WHERE `page_id`='{$itemid}'")or die(mysql_error());
        //if(!$sql) die ("Database access failed" . mysql_error());
        if(isset($_POST['submit'])){
            //start validation
            //check fields are not empty
            if(empty($pagetitle)) {
                $error['page_title'] = 'enter a title.';
                }
                $pagecontent = trim($_POST['page_content']);
                    if(empty($pagecontent)){
                        $error['page_content'] = 'Please enter your content.';
                    }
                        //If validation is ok... cary on.. do this
                        if (!$error) {
                            $pageid = $_POST['page_id'];
                            $pagetitle = $_POST['page_title'];
                            $pagecontent = $_POST['page_content'];
                        //Update items
                            $sql = "UPDATE content SET page_title ='$pagetitle', page_content ='$pagecontent' WHERE page_id='$itemid'";
                                $resultupdate = mysql_query($sql)or die (mysql_error());
                                //Success Message
                                    echo "Your site is now updated";
                                        }//close if !error
                                    }//close if form submit
                            //input validation checks input not empty
                            if (isset($error['page_title'])) {
                                echo "<p><span class="warning">" . $error['page_title']."</span><p> ";
                            }
                            if (isset($error['page_content'])) {
                                echo "<p><span class="warning">" . $error['page_content']."</span><p> ";
                            }
                            ?>
<div>
    <?php while ($row = mysql_fetch_object($sql)) { ?>
        <form action="<?php $_SERVER['PHP_SELF'];?>" method="post">
            <input type="hidden" name="page_id" value="<?php echo $row->page_id; ?>" />
            <div class="edit-title">
                <h2><label>Page Title</label></h2>
                <p><textarea name="page_title"><?php echo $row->page_title; ?></textarea></p>
            </div><!-- end edit title -->
            <div class="edit-content">
                <h2><label>Page Content</label></h2>
                <p><textarea name="page_content"><?php echo $row->page_content; ?></textarea></p>
            </div><!-- end edit content -->
            <div class="submit-form">
                <input type="submit" name="submit" value="Update" />
            </div>
        </form>
    <?php } ?>
</div>

Answer 1

检查$pagetitle是否存在，但不初始化它，您应该输入:

if(empty($_POST['page_title'])) { ... }

编辑:

if(isset($_POST['submit'])){
        //start validation
        //check fields are not empty
        if(empty($_POST['page_title'])) {
            $error['page_title'] = 'enter a title.';
        }
        $pagecontent = trim($_POST['page_content']);
        if(empty($pagecontent)){
            $error['page_content'] = 'Please enter your content.';
        }
        //If validation is ok... cary on.. do this
        if (!$error) {
            $pageid = $_POST['page_id'];
            $pagetitle = $_POST['page_title'];
            $pagecontent = $_POST['page_content'];
            //Update items
            $sql = "UPDATE content SET page_title ='$pagetitle', page_content ='$pagecontent' WHERE page_id='$itemid'";
            $resultupdate = mysql_query($sql)or die (mysql_error());
            //Success Message
            echo "Your site is now updated";
        }//close if !error
    }//close if form submit