我发现这个站点提供了用于创建、读取、更新和删除的代码。我对如何添加复选框、单选按钮和下拉菜单感到困惑
我根本不关心分页——我主要关心的是能够放入两个下拉菜单，是/否单选按钮，以及使用 PHP 的 3 个复选框的集合。
我的尝试毫无用处，因为当我尝试编辑选项时，值没有保留。包括我的三个文件：pets、editpets 和 view。（我更改了数据库的文件名等）
<?php
function renderForm($first, $last, $pets, $size, $type, $years, $error)
{
?>
<!DOCTYPE html>
<html>
<head>
<title>New Customer</title>
</head>
<body>
<?php
// display possible errors
if ($error != '')
{
echo '<div style="padding:4px; border:1px solid red; color:red;">'.$error.'</div>';
}
?>
<form action="" method="post">
<div>
<strong>First Name:</strong> <input type="text" name="firstname" value="<?php echo
$first; ?>" />
<strong>Last Name:</strong> <input align="center" type="text" name="lastname" value="<
?php echo $last; ?>" /><br/>
<p><strong>No. Pets </strong>
<select name="pets">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
</p>
<br/>
<strong>Size? </strong>
<br/>
Big<input type="radio" value="Yes" name="size" checked><?php echo $size; ?><br />
Small<input type="radio" value="No" name="size"<?php echo $size; ?><br />
<br />
<p><strong>Type</strong><br/>
<input name="type[]" type="checkbox" id="type[]"/>
Cats
<input name="type[]" type="checkbox" id="type[]"/>
Dogs
<input name="type[]" type="checkbox" id="type[]"/>
Others
</p>
<br/>
<strong>Years? </strong>
<select name="year">
<option value="Five or Less">Five or More</option>
<option value="Six or More">Six or More</option>
</select><br/>
<input style="color:purple;" type="submit" name="submit" value="Create My Order :-)">
</div>
</form>
<center><a href="view.php">Click Here for Orders</a></center>
</body>
</html>
<?php
}
// connect to the database
include('connect-db.php');
// check if my form submits and, upon triumph, process the form and save it to the database
if (isset($_POST['submit']))
{
// get form data, check its validity
$firstname = mysql_real_escape_string(htmlspecialchars($_POST['firstname']));
$lastname = mysql_real_escape_string(htmlspecialchars($_POST['lastname']));
$pets = $_POST['pets'];
$size = mysql_real_escape_string(htmlspecialchars($_POST['size']));
$type = serialize(mysql_real_escape_string(implode(',', $_POST['type'])));
$years = mysql_real_escape_string(htmlspecialchars($_POST['years']));
// check to make sure everything is filled!
if ($firstname == '' || $lastname == '' || $pets == '' || $size == '' || $type == '' || $years == '')
{
// generate error message
$error = 'ERROR: Please fill in all required fields!';
// if either field is blank, show the form again
renderForm($firstname, $lastname, $pets, $size, $type, $years, $error);
}
else
{
// save the data to the database
mysql_query("INSERT customers SET firstname='$firstname', lastname='$lastname', pets='$pets', size='$size', type='$type', years='$years'")
or die(mysql_error());
// once saved, redirect to cheview page
header("Location: view.php");
}
}
else
// if the form is not submitted, show my form again.
{
renderForm('','','','','','','');
}
?>
<?php
$types = array("Cats", "Dogs", "Others");
function renderForm($id, $firstname, $lastname, $pets, $size, $type, $years, $error)
{
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Edit Record</title>
</head>
<body>
<?php
// if there are any errors, display them
if ($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>First Name: </strong> <input type="text" name="firstname" value="<?php echo $firstname; ?>" /><br/>
<strong>Last Name: </strong> <input type="text" name="lastname" value="<?php echo $lastname; ?>" /><br/>
<p><strong>No. Pets </strong>
<select name="pets">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
</p>
<strong>Size? </strong>
<br/>
Big<input type="radio" value="Yes" name="size" checked><?php echo $size; ?><br />
Small<input type="radio" value="No" name="size"<?php echo $size; ?><br />
<br />
<br />
<br />
<p><strong>Type</strong><br/>
<input name="type[]" type="checkbox" id="type[]"/>
Cats
<input name="type[]" type="checkbox" id="type[]"/>
Dogs
<input name="type[]" type="checkbox" id="type[]"/>
Others
</p>
<br/>
<strong>Years? </strong>
<select name="year">
<option value="Five or Less">Five or More</option>
<option value="Six or More">Six or More</option>
</select><br/>
<br /><br />
<input type="submit" name="submit" value="Resubmit My Order :-)">
</div>
</form>
</body>
</html>
<?php
}
// connect to the database
include('connect-db.php');
// check if the form has been submitted. If it has, process the form and save it to the database
if (isset($_POST['submit']))
{
// check for id being an integer
if (is_numeric($_POST['id']))
{
// get form data, making sure it is valid
$id = $_POST['id'];
$firstname = mysql_real_escape_string(htmlspecialchars($_POST['firstname']));
$lastname = mysql_real_escape_string(htmlspecialchars($_POST['lastname']));
$pets = $_POST['pets'];
$size = mysql_real_escape_string(htmlspecialchars($_POST['size']));
$type = serialize(mysql_real_escape_string(implode(',', $_POST['type'])));
$years = mysql_real_escape_string(htmlspecialchars($_POST['years']));
// check that firstname/lastname fields are both filled in
if ($firstname == '' || $lastname == '' || $pets == '' || $size == '' || $type == '' || $years == '')
{
// generate error message
$error = 'ERROR: Please fill in all required fields!';
//error, display form
renderForm($id, $firstname, $lastname, $pets, $size, $type, $years, $error);
}
else
{
// save the data to the database
mysql_query("UPDATE customers SET firstname='$firstname', lastname='$lastname', pets='$pets', size='$size', type='$type', years='$years' WHERE id='$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'];
$result = mysql_query("SELECT * FROM customers WHERE id='$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
$firstname = $row['firstname'];
$lastname = $row['lastname'];
$pets = $row['pets'];
$size = $row['size'];
$type = serialize($row['type']);
$years = $row['years'];
// show form
renderForm($id, $firstname, $lastname, $pets, $size, $type, $years, '');
}
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!';
}
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>View customer orders</title>
</head>
<body>
<?php
include('connect-db.php');
$result = mysql_query("SELECT * FROM customers")
or die(mysql_error());
echo "<table border='1' cellpadding='10'>";
echo "<tr> <th>ID</th>
<th>First Name</th>
<th>Last Name</th>
<th>Pets</th>
<th>Size</th>
<th>Type</th>
<th>Years</th>
<th></th>
<th></th>
</tr>";
while($row = mysql_fetch_array( $result )) {
echo "<tr>";
echo '<td>' . $row['id'] . '</td>';
echo '<td>' . $row['firstname'] . '</td>';
echo '<td>' . $row['lastname'] . '</td>';
echo '<td>' . $row['pets'] . '</td>';
echo '<td>' . $row['size'] . '</td>';
echo '<td>' . $row['type']. '</td>';
echo '<td>' . $row['years'] . '</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>";
}
echo "</table>";
?>
<p><a href="pets.php">Add a new record</a></p>
</body>
</html>
我真的在这一点上迷路了。我已经为此工作了整整一个月，我不知道我在做什么了。如果有人可以帮助我编辑它以使其工作，我将非常感激。
感谢大家。