Hi,
I'm pretty new to PHP and to this discussion list.
I have a web form to update some fields in a data table. I'm getting
"undefined variable" notices in my error logs when I submit the form and the
table row doesn't get updated.
Here's the code for the form page:
<?php
include '../db.inc.php';
$ID = mysqli_real_escape_string($link, $_GET['ID']);
$result = mysqli_query($link, "select *
from intr_stats_eschol
where authorid='$ID'");
if (!$result)
{
$error = 'Error fetching eScholarship author details: ' .
mysqli_error($link);
include 'error.html.php';
exit();
}
$num=mysqli_num_rows($result);
echo "<h1>Editing Record</h1> <form method=\"post\"
action=\"eschol-edit-process.php\"> <table>";
for ($i=0; $i<$num; $i++) {
$row = mysqli_fetch_assoc ($result);
echo
"<tr><td>Last Name:</td><td><input type=\"text\" name=\"$row[lname]\"
value=\"$row[lname]\"></td></tr>
<tr><td>First Name:</td><td><input type=\"text\" name=\"$row[fname]\"
value=\"$row[fname]\"></td></tr>
<tr><td>Middle Name:</td><td><input type=\"text\" name=\"$row[mname]\"
value=\"$row[mname]\"></td></tr>
<tr><td>Suffix:</td><td><input type=\"text\" name=\"$row[suffix]\"
value=\"$row[suffix]\"></td></tr>
<tr><td>Email:</td><td><input type=\"text\" name=\"$row[email]\"
value=\"$row[email]\"></td></tr>
<tr><td>Institution:</td><td><input type=\"text\" name=\"$row[institution]\"
value=\"$row[institution]\"></td></tr>
<tr><td>Department:</td><td><input type=\"text\" name=\"$row[department]\"
value=\"$row[department]\"></td></tr>
<tr><td>Comments:</td><td><input type=\"text\" name=\"$row[comments]\"
value=\"$row[comments]\"></td></tr>
<tr><td>Send Email?</td><td>$row[sent_email]</td></tr>
<tr><td><input type=\"hidden\" name=\"authorid\"
value=\"$row[authorid]\"><input type=\"submit\" value=\"Update
Author\"></td><td> </td></tr>";
}
echo "</table> </form>";
?>
The data are inserted correctly into the form input fields, but when I click
the "Update Author" button, an "undefined variable" notice gets logged for each
of the variables and the table row doesn't get updated. The only variable that
seems to be OK is the authorid field; it outputs the correct ID from the
var_dump() I have inserted.
Here's the code that processes the form:
<?php
include '../db.inc.php';
if (isset($_POST['authorid']))
{
$authorid = mysqli_real_escape_string($link, $_POST['authorid']);
var_dump($authorid);
}
if (isset($_POST['lname']))
{
$lname = mysqli_real_escape_string($link, $_POST['lname']);
}
if (isset($_POST['fname']))
{
$fname = mysqli_real_escape_string($link, $_POST['fname']);
}
if (isset($_POST['mname']))
{
$mname = mysqli_real_escape_string($link, $_POST['mname']);
}
if (isset($_POST['email']))
{
$email = mysqli_real_escape_string($link, $_POST['email']);
}
if (isset($_POST['institution']))
{
$institution = mysqli_real_escape_string($link, $_POST['institution']);
}
if (isset($_POST['department']))
{
$department = mysqli_real_escape_string($link, $_POST['department']);
}
if (isset($_POST['comments']))
{
$comments = mysqli_real_escape_string($link, $_POST['comments']);
}
if (isset($_POST['sent_email']))
{
$sent_email = mysqli_real_escape_string($link, $_POST['sent_email']);
}
if (isset($_POST['suffix']))
{
$suffix = mysqli_real_escape_string($link, $_POST['suffix']);
}
$sql = "update intr_stats_eschol
set
lname='$lname',fname='$fname',mname='$mname',email='$email',institution='$institution',department='$department',comments='$comments',sent_email='$sent_email',suffix='$suffix'
where authorid='$authorid'";
if (!$sql)
{
$error = 'Error fetching eScholarship author details: ' .
mysqli_error($link);
include 'error.html.php';
exit();
}
?>
Can anyone tell where I'm going wrong? I thought it might be some obvious
thing like the use of single quotes instead of double quotes in the update
query, or vice-versa, but I've tried several different ways. I've looked at
numerous stackoverflow.com postings but nothing seems to remedy the issue I'm
having. I'm also wondering if the problem is related to my using echo() to
output the form fields in the first template.
FWIW, here's the design of my table:
+-------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra
|
+-------------+------------------+------+-----+---------+----------------+
| email | varchar(255) | YES | | NULL |
|
| institution | varchar(200) | YES | | NULL |
|
| lname | varchar(100) | YES | | NULL |
|
| fname | varchar(80) | YES | | NULL |
|
| mname | varchar(20) | YES | | NULL |
|
| department | varchar(200) | YES | | NULL | |
| comments | varchar(255) | YES | | NULL | |
| authorid | int(5) | NO | PRI | NULL | auto_increment
|
| sent_email | varchar(20) | YES | | NULL |
|
| suffix | varchar(50) | YES | | NULL |
|
+-------------+--------------+------+-----+---------+----------------+
Thanks for any help you can give me!
--
Robert J. Vander Hart
University of Massachusetts Medical School
508-856-3290 | robert.vanderh...@umassmed.edu
