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代码为20的2014年1月如何从数据库编辑单个记录？
<?php
session_start();
// connect to the database
include('connect.php');
$message = $_GET['message'];
// check if the form has been submitted then process it
if (isset($_POST['submit']))
{
// Get data from table
//set the id manually for test purposes
$id = "429";
$forename = mysql_real_escape_string(htmlspecialchars($_POST['forename']));
$surname = mysql_real_escape_string(htmlspecialchars($_POST['surname']));
$username = mysql_real_escape_string(htmlspecialchars($_POST['username']));
$email = mysql_real_escape_string(htmlspecialchars($_POST['email']));
$password = mysql_real_escape_string(htmlspecialchars($_POST['password']));
// check for empty fields and display error message
if ($forename == '' || $surname == '' || $username == '' || $password == '' || $email == '')
{
$message = "Please enter data in all fields" ;
header("Location: edit.php?message=$message");
}
else
{
// save the data to the table
mysql_query("UPDATE registration SET forename='$forename', surname='$surname', username='$username', email='$email', password='$password' WHERE id='$id'")
or die(mysql_error());
}
// redirecr and display message
$message = "Your changes have been saved";
header("Location: edit.php?message=$message");
exit;
}
$id=429;// this line could have been $id=$_SESSION['id'];
$result = mysql_query("SELECT * FROM registration WHERE id=$id LIMIT 1")
or die(mysql_error());
$row = mysql_fetch_array($result);
// check that the 'id' matches up with a row in the databse
if($row)
{
// get data from the table
$forename = $row['forename'];
$surname = $row['surname'];
$username = $row['username'];
$email = $row['email'];
$password = $row['password'];
//dummy echo
print $message;
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="styles/all.css" />
<link rel="stylesheet" href="styles/forms.css" />
<script type="text/javascript" src="javascript/jquery-1.7.1.min.js"></script>
<link href='//fonts.googleapis.com/css?family=Cantora+One' rel='stylesheet' type='text/css'>
<link href='//fonts.googleapis.com/css?family=Voltaire' rel='stylesheet' type='text/css'>
<link href='//fonts.googleapis.com/css?family=Ubuntu:400,500' rel='stylesheet' type='text/css'>
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
</head>
<div class="container">
<form action="" method="post" enctype="multipart/form-data" name="edit" id="editrecord">
<fieldset>
<legend><span class="headingreg">Edit Details</span></legend>
<div class="formreg">
<input type="hidden" name="id" value="<?php echo $id; ?>"/>
<br style="clear:left;"/>
<label for="forename">Forename</label><div><input type="text" id="forename" name="forename" class="insetedit" value="<?php echo $forename; ?>"/><br/></div>
<label for="forename">Surname</label><div><input type="text" name="surname" class="insetedit" value="<?php echo $surname; ?>"/><br/></div>
<label for="forename">Username</label><div><input type="text" name="username" class="insetedit" value="<?php echo $username; ?>"/><br/></div>
<label for="forename">Password</label><div><input type="text" name="password" class="insetedit" value="<?php echo $password; ?>"/><br/></div>
<label for="forename">email</label><div><input type="text" name="email" class="insetedit" value="<?php echo $email; ?>"/><br/></div>
<input type="submit" name="submit" class="submit2" value="submit">
</div>
</fieldset>
</form>
<br style="clear:left;"/>
<br style="clear:left;"/>
</body>
</html>
缩进REMOVED
我下面要编辑的教程，并在数据库中删除存储的记录。
http://www.falkencreative.com/forum/records/view.php
在本教程中一个页面显示记录在数据库中，另一个用来编辑记录：
http://www.falkencreative.com/forum/records/edit.php?id=33004
的问题是数据库中的所有记录都显示出来。我需要做什么更改才能显示和编辑基于单个页面上指定ID的记录？例如
$ id =“429”;
最终我会使用会话，但为了测试目的，我想手动设置ID。
我试着把代码放在一个页面中，但有很多错误，例如标题已发送。
这是edit.php页面，我尝试手动设置ID。
<?php
/*
EDIT.PHP
Allows user to edit specific entry in database
*/
// creates the edit record form
// since this form is used multiple times in this file, I have made it a function that is easily reusable
function renderForm($id, $forename, $surname, $username, $password, $email, $error)
{
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Edit Record</title>
</head>
<body>
<?php
// if there are any errors, display them
if ($error != '')
{
echo '<div style="padding:4px; border:1px solid red; color:red;">'.$error.'</div>';
}
?>
<form action="" method="post">
<input type="hidden" name="id" value="<?php echo $id; ?>"/>
<div>
<p><strong>ID:</strong> <?php echo $id; ?></p>
<strong>Forename: *</strong> <input type="text" name="forename" value="<?php echo $forename; ?>"/><br/>
<strong>Surname: *</strong> <input type="text" name="surname" value="<?php echo $surname; ?>"/><br/>
<strong>Username: *</strong> <input type="text" name="username" value="<?php echo $username; ?>"/><br/>
<strong>email: *</strong> <input type="text" name="password" value="<?php echo $password; ?>"/><br/>
<strong>password: *</strong> <input type="text" name="email" value="<?php echo $email; ?>"/><br/>
<p>* Required</p>
<input type="submit" name="submit" value="Submit">
</div>
</form>
</body>
</html>
<?php
}
// connect to the database
include('connect-db.php');
// check if the form has been submitted. If it has, process the form and save it to the database
if (isset($_POST['submit']))
{
// confirm that the 'id' value is a valid integer before getting the form data
if (is_numeric($_POST['id']))
{
// get form data, making sure it is valid
$id = "429";
$forename = mysql_real_escape_string(htmlspecialchars($_POST['forename']));
$surname = mysql_real_escape_string(htmlspecialchars($_POST['surname']));
$username = mysql_real_escape_string(htmlspecialchars($_POST['username']));
$email = mysql_real_escape_string(htmlspecialchars($_POST['email']));
$password = mysql_real_escape_string(htmlspecialchars($_POST['password']));
// check that forename/surname fields are both filled in
if ($forename == '' || $surname == '' || $username == '' || $password == '' || $email == '')
{
// generate error message
$error = 'ERROR: Please fill in all required fields!';
//error, display form
renderForm($id, $forename, $surname, $username, $password, $email, $error);
}
else
{
// save the data to the database
mysql_query("UPDATE login SET forename='$forename', surname='$surname', username='$username', email='$email', password='$password' WHERE id='$id'")
or die(mysql_error());
// once saved, redirect back to the view page
header("Location: view.php");
}
}
else
{
// if the 'id' isn't valid, display an error
echo 'Error!';
}
}
else
// if the form hasn't been submitted, get the data from the db and display the form
{
// get the 'id' value from the URL (if it exists), making sure that it is valid (checing that it is numeric/larger than 0)
if (isset($_GET['id']) && is_numeric($_GET['id']) && $_GET['id'] > 0)
{
// query db
$id = $_GET['id'];
$result = mysql_query("SELECT * FROM login WHERE id=$id")
or die(mysql_error());
$row = mysql_fetch_array($result);
// check that the 'id' matches up with a row in the databse
if($row)
{
// get data from db
$forename = $row['forename'];
$surname = $row['surname'];
$username = $row['username'];
$email = $row['email'];
$password = $row['password'];
// show form
renderForm($id, $forename, $surname, $username, $password, $email, '');
}
else
// if no match, display result
{
echo "No results!";
}
}
else
// if the 'id' in the URL isn't valid, or if there is no 'id' value, display an error
{
echo 'Error!';
}
}
?>
而且view.php页面：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>View Records</title>
</head>
<body>
<?php
/*
VIEW.PHP
Displays all data from 'players' table
*/
// connect to the database
include('connect-db.php');
// get results from database
$result = mysql_query("SELECT * FROM login")
or die(mysql_error());
// display data in table
echo "<p><b>View All</b> | <a href='view-paginated.php?page=1'>View Paginated</a></p>";
echo "<table border='1' cellpadding='10'>";
echo "<tr> <th>ID</th> <th>Forename</th> <th>Surname</th> <th>Username</th> <th>eMail</th> <th>Password</th></tr>";
// loop through results of database query, displaying them in the table
while($row = mysql_fetch_array($result)) {
// echo out the contents of each row into a table
echo "<tr>";
echo '<td>' . $row['id'] . '</td>';
echo '<td>' . $row['forename'] . '</td>';
echo '<td>' . $row['surname'] . '</td>';
echo '<td>' . $row['username'] . '</td>';
echo '<td>' . $row['password'] . '</td>';
echo '<td>' . $row['email'] . '</td>';
echo '<td><a href="edit.php?id=' . $row['id'] . '">Edit</a></td>';
echo '<td><a href="delete.php?id=' . $row['id'] . '">Delete</a></td>';
echo "</tr>";
}
// close table>
echo "</table>";
?>
<p><a href="new.php">Add a new record</a></p>
</body>
</html>
REMOVED功能和错误变量
<?php
include('connect.php');
// check if the form has been submitted. If it has, process the form and save it to the database
if (isset($_POST['submit']))
{
// get form data
$id = "429";
$forename = mysql_real_escape_string(htmlspecialchars($_POST['forename']));
$surname = mysql_real_escape_string(htmlspecialchars($_POST['surname']));
$username = mysql_real_escape_string(htmlspecialchars($_POST['username']));
$email = mysql_real_escape_string(htmlspecialchars($_POST['email']));
$password = mysql_real_escape_string(htmlspecialchars($_POST['password']));
// check empty fields
if ($forename == '' || $surname == '' || $username == '' || $password == '' || $email == '')
{
// generate error message
echo 'ERROR: Please fill in all required fields!';
}
else
{
// save the data to the database
mysql_query("UPDATE registration SET forename='$forename', surname='$surname', username='$username', email='$email', password='$password' WHERE id='$id'")
or die(mysql_error());
// Redirect
echo "Your changes have been saved";
header("Location: edit.php");
}
}
$id=429;// this line could have been $id=$_SESSION['id'];
$result = mysql_query("SELECT * FROM registration WHERE id=$id LIMIT 1")
or die(mysql_error());
$row = mysql_fetch_array($result);
// check that the 'id' matches up with a row in the databse
if($row)
{
// get data from db
$forename = $row['forename'];
$surname = $row['surname'];
$username = $row['username'];
$email = $row['email'];
$password = $row['password'];
//dummy echo
echo 'formatting is messed up';
}
?>
* * *教程，使用折旧函数 – 2014-01-16 02:30:05
'“SELECT * FROM登录WHERE ID = $ ID”' – Sablefoste
这已经在上面的edit.php代码中。 – Nullbreaker