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社区首页 >问答首页 >PHP表单-错误消息放置

问PHP表单-错误消息放置
EN

Stack Overflow用户
提问于 2011-06-27 18:11:09
回答 2查看 433关注 0票数 0

我已经创建了一个具有多个字段的表单，我将这些字段发布到数据库中。

在表单的底部，我设置了一些简单的错误检查，以确保所有必填字段都是完整的。

当用户单击submit按钮时，我的错误检查就会发生，如果有错误，它将输出一个字符串，其中包含它遇到的错误。

这些错误当前显示在表单的下方，但我希望它们显示在表单域的上方。有没有什么办法可以让我这样做？

你知道我该怎么做吗？

以下是代码

代码语言：javascript
复制
enter code here
<! Code to check that the user has logged into to view this page !>
<?php
session_start();
if (!(isset($_SESSION['login']) && $_SESSION['login'] != '')) {
header ("Location: login.php");
}
?>
<!Connection details for connecting to mysql database!>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Op Tech Database - Add Record</title>
</head>
<!Code to Create drop down menu's!>
<?php
//Code for collectiing values for Student Names drop down drop
$result1=mysql_query("SELECT studentID, studentName FROM students");
$options1="";
while ($row=mysql_fetch_array($result1)) {

    $id=$row["studentID"];
    $first=$row["studentName"];

    $options1.="<OPTION VALUE=\"$first\">".$first.'</option>';
    }

//Code for getting tutors names in drop down list
$result2=mysql_query("SELECT staffID, tutorName FROM staff");

$options2="";
while ($row=mysql_fetch_array($result2)) {

    $id=$row["staffID"];
    $first=$row["tutorName"];

    $options2.="<OPTION VALUE=\"$first\">".$first.'</option>';
}


  if(isset($_REQUEST['submited'])) {

$errorMessage = "This is the standard error message";

$options1 = $_POST['studentName'];
$options2 = $_POST['tutorName'];
$procedure = htmlspecialchars($_POST['procedure']);
$grade = $_POST['grade'];
$studentReflection = htmlspecialchars($_POST['studentReflection']);
$professionalism = $_POST['professionalism'];
$communication = $_POST['communication'];
$tutorComments = htmlspecialchars($_POST ['tutorComments']);


/*if(empty($_POST['alert']))
{
$_POST['alert'] = "NO";
}
*/
$alert = $_POST['alert'] ;

$studentNameError = "You did not enter the student name";

$error = false;
if(empty($_POST['studentName'])) 
{
$studentNameError = "You did not enter the student name";
echo "<h3> $studentNameError </h3>";
$error = true;
}
//Code to check that the Tutor Name field is completed
if(empty($_POST['tutorName'] ))
{
echo "<h3>You did not select a tutor name.</h3>";
$error = true;
}
//Code to check that the Procedure field is completed
if(empty($_POST['procedure'] ))
{
echo  "<h3>You did not select a procedure.k</h3>";
$error = true;
}
//Code to check that the Grade field is completed
if(empty($_POST['grade'] ))
{
echo "<h3>You did not select a grade.</h3>";
$error = true;
}
//Code to check that the Student Reflection field is completed
if(empty($_POST['studentReflection'] ))
{
echo "<h3>The student did not enter any comments for this procedure. Student reflection is required for each procedure. </h3>";
$error = true;
}
//Code to check if the tick box is checked that the tutor comment is entered

if( !strlen($_POST['tutorComments']) && isset($_POST['alert'] ))
{
    echo "<h3>You must enter a reason why you have clicked the alert box</h3>";
    $error = true;
}
if($error)
{
    exit();
}

  ?>
<body>
<link rel="stylesheet" type="text/css" href="ex1.css" >
<link rel="stylesheet" media="only screen and (max-device-width: 1024px)" href="ipad.css" type="text/css" />
<!Create HTML elements!>
<form name="myform" form method="post">
  <h1 align="center"><a href="form.php"><img src="colour_logo_400.jpg" alt="University Logo" width="400" height="185" /></a></h1>
  <h1 align="center">Dental Hygiene Operative Technique Database</h1>
  <h2 align="center">Welcome to the Dental Hygiene Operative Technique Database v1</h2>
  <p align="left">&nbsp;</p>
  <p align="left">Student Name(*)</p>
  <p align="left">
   <! Drop Down Menu to get student names from database !>
    <SELECT NAME=studentName >
        <OPTION VALUE=0 selected="selected" >
            <?php if(isset($_POST['studentName'])) echo $_POST['studentName'];?>
        <?php echo $options1?>
    </SELECT>  

  <p align="left">Tutor Name  
  (*)<p align="left"> 
    <! Drop Down Menu to get tutor names from database !>
    <select name=tutorName>
        <option value=0>
            <?php if(isset($_POST['tutorName'])) echo $_POST['tutorName'];?>
      <?php echo $options2 ?> </option> 

    </select>
  <p align="left">
  <p align="left"><br>


    Procedure(*)
      <input type="text" name="procedure"  value="<?php if(isset($_POST['procedure'])) echo $_POST['procedure'];?>" />
    <select name=grade id=grade>
      <option value="">Grade </option>
      <option value="N" <?php if (isset($_POST['grade']) && $_POST['grade'] == "N") { echo 'selected="selected"';} ?>>N</option>
      <option value="B" <?php if (isset($_POST['grade']) && $_POST['grade'] == "B") { echo 'selected="selected"';} ?>>B</option>
      <option value="C" <?php if (isset($_POST['grade']) && $_POST['grade'] == "C") {   echo 'selected="selected"';} ?>>C</option>
    </select>
    (*)
  <p align="left">

 Student Reflection:
        (*)<br>
        <textarea name="studentReflection" cols="75" rows="5"><?php if(isset($_POST['studentReflection'])) echo $_POST[             'studentReflection'];?></textarea>
  <p align="left">
        <SELECT NAME=professionalism>
          <OPTION VALUE="">Professionalism
          <OPTION VALUE="U" <?php if (isset($_POST['professionalism']) && $_POST['professionalism'] == "U") {
      echo 'selected="selected"';} ?>>U</option>
          <OPTION VALUE="S" <?php if (isset($_POST['professionalism']) && $_POST['professionalism'] == "S") {
      echo 'selected="selected"';} ?>>S</option>
          <OPTION VALUE="E" <?php if (isset($_POST['professionalism']) && $_POST['professionalism'] == "E") {
      echo 'selected="selected"';} ?>>U</option>
        </SELECT>
        </SELECT>

      <SELECT NAME=communication>
        <OPTION VALUE="">Communication
        <OPTION VALUE="U" <?php if (isset($_POST['communication']) && $_POST['communication'] == "U") {
      echo 'selected="selected"';} ?>>U</option>
        <OPTION VALUE="S" <?php if (isset($_POST['communication']) && $_POST['communication'] == "S") {
      echo 'selected="selected"';} ?>>S</option>
        <OPTION VALUE="E" <?php if (isset($_POST['communication']) && $_POST['communication'] == "E") {
      echo 'selected="selected"';} ?>>U</option>
    </SELECT>

        Alert:
        <input type="checkbox" value="YES" name="alert" >  
        <br>
        <br>
        Tutor Comments:
        <br>
        <br>
<textarea name="tutorComments" cols="75" rows="5">
<?php if(isset($_POST['tutorComments'])) echo $_POST['tutorComments'];?></textarea>
  <p align="left">


<!Submit buttons for the form!>

  <input type="submit" name="mattbutton" class="mattbutton" value="Update Database"  name="submit"/> 
  <input type='button' name="mattbutton" class="mattbutton" value='Logout' onClick="window.location.href='logout.php'">  
  <input type="hidden" name="submited" value="true" />
  <p align="left">
    <?php

//Code to turn off error reporting
//error_reporting(0);

//Error Message to display if all the correct fields are not completed.



//Code to connect to the database


$query= "INSERT INTO entry (entryID, studentName , tutorName , procedureName , grade , studentReflection , tutorComments,  professionalism , communication , alert  ) VALUES ('NULL', '".$options1."' , '".$options2." ' , '".$procedure."' , '".$grade."' , '".$studentReflection."', '".$tutorComments."' , '".$professionalism."' , '".$communication."' , '".$alert."'  )";


mysql_query($query) or die ('Error : You are attempting to enter information which cannot be stored or contains code. Please refesh the from and try again<br>' .mysql_error());


echo "<h3>The Database Has been updated. Thanks </h3></b>" ; 
}
?>
</FORM>
<p>  <a href="form.php">Enter another procedure </a>
<p>&nbsp;</p>
<p>&nbsp;</p>
</body>
</html>
php
webforms
EN

回答 2

Stack Overflow用户

发布于 2011-06-27 18:15:30

将错误检查代码放在窗体呈现代码的“上方”应该不会有任何问题。一旦表单提交(大概是通过POST )，您就拥有了一个数组( $_POST数组)中的所有表单变量，无论您是否决定重新呈现表单，都可以使用这些变量。

票数 0
EN

Stack Overflow用户

发布于 2011-06-27 18:18:58

您可以在表单中创建一个隐藏字段，例如

代码语言：javascript
复制
<input type="hidden" name="isSubmitted" value ="1">

然后，在您的检查例程中，您首先检查$_POST'isSubmitted' == 1是否为真，然后您就知道用户已经提交了您的表单，然后您可以进行其他检查

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/6491350

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