PHP表单-错误消息放置
[英]PHP Form - Error Message Placements
问题描述
我创建了一个表单，其中包含许多要发布到数据库中的字段。
在表格II的底部设置了一些简单的错误检查，以确保所有必填字段均完整。
当用户单击“提交”按钮时，将进行我的错误检查，如果有错误，它将输出包含遇到的错误的字符串。
这些错误当前显示在表单下方，但我希望它们显示在表单字段上方。 反正我能做到这一点吗？
如果我将错误检查代码过分地移到表单字段上方，则它将无法正常工作，因为它会在完成任何字段之前检查错误。
有什么想法可以做到吗？
这是代码
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"> </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> </p>
<p> </p>
</body>
</html>
2 个解决方案
解决方案1
0 2011-06-27 10:15:29
将错误检查代码“位于”表单呈现代码“上方”应该没有任何问题。 提交表单（大概是通过POST）后，您将所有表单变量保存在一个数组（ $_POST数组）中，无论您是否决定重新呈现该表单，都可以使用它们。
解决方案2
0 2011-06-27 10:18:58
您可以在表单中创建一个隐藏字段，例如
<input type="hidden" name="isSubmitted" value ="1">
然后，在检查例程中，首先检查$ _POST ['isSubmitted']（或$ _GET ['isSubmitted']）== 1如果为true，那么您知道该用户已经提交了表单，则可以您的额外支票
错误消息未以php形式显示
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