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sashaca2/edit form

Created September 23, 2012 23:56
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Edit Record
Raw
edit form
<?php
/*
Allows the user to both create new records and edit existing records
*/
// connect to the database
include("connect-db.php");
// creates the new/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($artist_id = '', $pub_date ='', $caption = '', $error = '', $id = '')
{ ?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>
<?php if ($id != '') { echo "Edit Record"; } else { echo "New Record"; } ?>
</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<h1><?php if ($id != '') { echo "Edit Record"; } else { echo "New Record"; } ?></h1>
<?php if ($error != '') {
echo "<div style='padding:4px; border:1px solid red; color:red'>" . $error
. "</div>";
} ?>
<form action="" method="post">
<div>
<?php if ($id != '') { ?>
<input type="hidden" name="toon_no" value="<?php echo $id; ?>" />
<p>Cartoon ID: <?php echo $id; ?></p>
<?php } ?>
<strong>Artist ID: *</strong> <input type="text" name="fk_artist_no"
value="<?php echo $artist_id; ?>"/><br/>
<strong>Pub Date: <em>YYYY-MM-DD</em> *</strong> <input type="text" name="p_date"
value="<?php echo $pub_date; ?>"/>
<strong>Caption: *</strong> <input type="text" name="title"
value="<?php echo $caption; ?>"/>
<p>* required</p>
<input type="submit" name="submit" value="Submit" />
</div>
</form>
</body>
</html>
<?php }
/*
EDIT RECORD
*/
// if the 'id' variable is set in the URL, we know that we need to edit a record
if (isset($_GET['toon_no']))
{
// if the form's submit button is clicked, we need to process the form
if (isset($_POST['submit']))
{
// make sure the 'id' in the URL is valid
if (is_numeric($_POST['toon_no']))
{
// get variables from the URL/form
$id = $_POST['toon_no'];
$artist_id = htmlentities($_POST['fk_artist_no'], ENT_QUOTES);
$pub_date = htmlentities($_POST['p_date'], ENT_QUOTES);
$caption = htmlentities($_POST['title'], ENT_QUOTES);
// check that firstname and lastname are both not empty
if ($artist_id == '' || $pub_date == '' || $caption == '')
{
// if they are empty, show an error message and display the form
$error = 'ERROR: Please fill in all required fields!';
renderForm($artist_id, $pub_date, $caption, $error, $id);
}
else
{
// if everything is fine, update the record in the database
if ($stmt = $mysqli->prepare("UPDATE cartoons SET fk_artist_no = ?, p_date = ?, title = ?
WHERE toon_no=?"))
{
$stmt->bind_param("ssi", $artist_id, $pub_date, $caption, $id);
$stmt->execute();
$stmt->close();
}
// show an error message if the query has an error
else
{
echo "ERROR: could not prepare SQL statement.";
}
// redirect the user once the form is updated
header("Location: viewtest.php");
}
}
// if the 'id' variable is not valid, show an error message
else
{
echo "Error!";
}
}
// if the form hasn't been submitted yet, get the info from the database and show the form
else
{
// make sure the 'id' value is valid
if (is_numeric($_GET['toon_no']) && $_GET['toon_no'] > 0)
{
// get 'id' from URL
$id = $_GET['toon_no'];
// get the recod from the database
if($stmt = $mysqli->prepare("SELECT * FROM cartoons WHERE toon_no=?"))
{
$stmt->bind_param("i", $id);
$stmt->execute();
$stmt->bind_result($id, $artist_id, $pub_date, $caption);
$stmt->fetch();
// show the form
renderForm($artist_id, $pub_date, $caption, NULL, $id);
$stmt->close();
}
// show an error if the query has an error
else
{
echo "Error: could not prepare SQL statement";
}
}
// if the 'id' value is not valid, redirect the user back to the view.php page
else
{
header("Location: viewtest.php");
}
}
}
?>
Raw
view entry
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>View Records</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<h1>View Records</h1>
<p><b>View All</b> | <a href="view-paginated.php">View Paginated</a></p>
<?php
// connect to the database
include('connect-db.php');
// get the records from the database
if ($result = $mysqli->query("SELECT * FROM cartoons ORDER BY toon_no"))
{
// display records if there are records to display
if ($result->num_rows > 0)
{
// display records in a table
echo "<table border='1' cellpadding='10'>";
// set table headers
echo "<tr><th>ID</th><th>Artist ID</th><th>Pub Date</th><th>Caption</th><th></th><th></th></tr>";
while ($row = $result->fetch_object())
{
// set up a row for each record
echo "<tr>";
echo "<td>" . $row->toon_no . "</td>";
echo "<td>" . $row->fk_artist_no . "</td>";
echo "<td>" . $row->p_date . "</td>";
echo "<td>" . $row->title . "</td>";
echo "<td><a href='recordstest.php?toon_no=" . $row->toon_no . "'>Edit</a></td>";
echo "<td><a href='delete.php?toon_no=" . $row->toon_no . "'>Delete</a></td>";
echo "</tr>";
}
echo "</table>";
}
// if there are no records in the database, display an alert message
else
{
echo "No results to display!";
}
}
// show an error if there is an issue with the database query
else
{
echo "Error: " . $mysqli->error;
}
// close database connection
$mysqli->close();
?>
<a href="records.php">Add New Record</a>
</body>
</html>
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