Hi,
I have a problem with the second file. I am not able to update the
data from the php program. Any help on that would be appreciated.
Any modification which would be reduce the code like directly using the
Update command would be appreciated.
thanks in advance.
My exact problem with second file is as follows:
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource on line 15
Here are the 3 files.
////////////////////
File1
---------------
<html><head><title>Book Update Form</title></head>
<body>
<?
$db="project";
$link = mysql_connect("localhost","name","passwd");
if (! $link)
die("Couldn't connect to MySQL");
mysql_select_db($db , $link)
or die("Couldn't open $db: ".mysql_error());
$result = mysql_query( "SELECT * FROM books" )
or die("SELECT Error: ".mysql_error());
$num_rows = mysql_num_rows($result);
print "There are $num_rows records.<P>";
print "<table width=800 border=1>\n";
while ($get_info = mysql_fetch_row($result)){
print "<tr>\n";
foreach ($get_info as $field)
print "\t<td><font face=arial size=2/>$field</font></td>\n";
print "</tr>\n";
}
print "</table>\n";
mysql_close($link);
//<form method="POST" action="book_change_form.php">
?>
<br>
<form method="POST" action="book_change_form.php">
<pre>
Enter ISBN Number to Edit: <input type="text" name="id" size="10">
<input type="submit" value="Submit"><input type="reset">
</pre>
</form>
</body>
</html>
////////////////////
File 2
---------------------
<html><head><title>Book change form</title></head>
<body>
<?
$id=$_POST['id'];
$db="project";
//mysql_connect(localhost,$_POST['username'],$_POST['pass']);
$link = mysql_connect("localhost","name","passwd");
if (! $link)
die("Couldn't connect to MySQL");
mysql_select_db($db , $link)
or die("Couldn't open $db: ".mysql_error());
$query=" SELECT * FROM books WHERE id='$id'";
$result=mysql_query($query);
$num=mysql_num_rows($result);
//echo $num;
$i=0;
while ($i < $num)
{
$isbn=mysql_result($result,$i,"isbn");
$title=mysql_result($result,$i,"title");
$author=mysql_result($result,$i,"author");
$edition=mysql_result($result,$i,"edition");
$course_id=mysql_result($result,$i,"course");
$quantity=mysql_result($result,$i,"quantity");
$stack_no=mysql_result($result,$i,"stack_no");
?>
<table width="300" cellpadding="10" cellspacing="0" border="2">
<tr align="center" valign="top">
<td align="center" colspan="1" rowspan="1" bgcolor="#64b1ff">
<h3>Edit and Submit</h3>
<form action="book_change_record.php" method="post">
<input type="hidden" name="username" value="<?php print
$_POST['username']?>">
<input type="hidden" name="pass" value="<?php print $_POST['pass']?>">
<input type="hidden" name="ud_id" value="<? echo "$id" ?>">
ISBN: <input type="text" name="ud_isbn" value="<? print
"$isbn"?>"><br>
Title: <input type="text" name="ud_title" value="<? print
"$title"?>"><br>
Author: <input type="text" name="ud_author" value="<? print
"$author"?>"><br>
Edition: <input type="text" name="ud_edition" value="<? print
"$edition"?>"><br>
Course Id: <input type="text" name="ud_course_id" value="<? print
"$course_id"?>"><br>
Quantity: <input type="text" name="ud_quantity" value="<? print
"$quantity"?>"><br>
Stack Number:<input type="text" name="ud_stack_no" value="<? echo
"$stack_no"?>"><br>
<input type="Submit" value="Update">
</form>
</td></tr></table>
<?
++$i;
}//end while
?>
</body>
</html>
//////////////
File 3
------------------------------------
<html><head><title>Book Change Record</title></head>
<body>
<?
$user=$_POST['username'];
$password=$_POST['password'];
$ud_id=$_POST['ud_id'];
$ud_isbn=$_POST['ud_isbn'];
$ud_title=$_POST['ud_title'];
$ud_author=$_POST['ud_author'];
$ud_edition=$_POST['ud_edition'];
$ud_course_id=$_POST['ud_course_id'];
$ud_quantity=$_POST['ud_quantity'];
$ud_stack_no=$_POST['ud_stack_no'];
$db="project";
$link = mysql_connect("localhost","name","passwd");
if (! $link)
die("Couldn't connect to MySQL");
mysql_select_db($db , $link)
or die("Couldn't open $db: ".mysql_error());
mysql_query(" UPDATE books SET isbn='$ud_isbn' ,title='$ud_title',
author='$ud_author',edition='$ud_edition',course_id='$ud_course_id', quantity = '$ud_quantity', stack_no =
'$ud_stack_no'
WHERE isbn='$ud_id'");
echo "Record Updated";
mysql_close($link);
?>
<form method="POST" action="book_update_form.php">
<input type="hidden" name="username" value="<?php print
$_POST['username']?>">
<input type="hidden" name="pass" value="<?php print
$_POST['password']?>">
<input type="submit" value="Change Another">
</form><br>
<form method="POST" action="book.php">
<input type="hidden" name="username" value="<?php print
$_POST['username']?>">
<input type="hidden" name="pass" value="<?php print
$_POST['password']?>">
<input type="submit" value="Book Interface">
</form>
</body>
</html>
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