Supplied Argument is not valid MySQL Resource

CrownVictoriaCop · October 21, 2009

This is my code for a PHP page.

<?php

$SID = $_POST['id'];

mysql_connect("localhost","safetyfi_secure","hidden") or die("Error: ".mysqlerror());
mysql_select_db("safetyfi_students"); 

while ($row = mysql_fetch_array("select * from Students where ID = $SID")){

$id = $row['ID'];
$studentname = $row['StudentName'];
$parentfirstname = $row['ParentFirstName'];
$lastname = $row['ParentLastName'];
$class = $row['Class'];
$address = $row['Address'];
$city = $row['City'];
$state = $row['State'];
$zip = $row['ZIP'];
$phone = $row['Phone'];
$school = $row['School'];
$birthmonth = $row['BirthMonth'];
$birthday = $row['BirthDay'];
$birthyear = $row['BirthYear'];
$paymentmethod = $row['PaymentMethod'];

}
mysql_free_result($query);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>ODISM Instructor Control Panel</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<link rel="stylesheet" href="menu.css" type="text/css" />
<script type="text/javascript">
<!--
function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
    } if (errors) alert('The following error(s) occurred:\n'+errors);
    document.MM_returnValue = (errors == '');
} }
//-->
</script>
</head>
<body>
<!-- Begin Wrapper -->
<div id="wrapper">
  <!-- Begin Header -->
  <div id="header">
    <h1><img src="banner.png" width="907" height="100" alt="Imponente Web Services" /></h1>
  </div>
  <!-- End Header -->
  <!-- Begin Left Column -->
  <div id="leftcolumn">
     <div align="center"><font size="4">Student Management</font><br />
    </div>
  <div id="menu">
  <ul>
    <li><a href="directory.php">List Students</a></li>
    <li><a href="addstudent.php">Add Student</a></li>
    <li><a href="editstudent.php">Edit Student</a></li>
    <li><a href="deletestudent.php">Delete Student</a></li>
    </ul>
</div></div>
  <!-- End Left Column -->
  <!-- Begin Content Column -->
  <div id="content">
    <p>Edit Student</p>
    <br />
    <p>The student record is displayed below for you to edit.</p>
    <br />
<form action="updateinfo.php" method="post">
  <p>Student's First Name:
  <input type="text" value="<?php echo $studentname;?>" name="studentname"/><br />
    Parent's First Name: <input type="text" value="<?php echo $parentfirstname;?>" name="parentfirstname"/><br />
    Parent's Last Name: <input type="text" value="<?php echo $lastname;?>" name="lastname"/><br />
    Phone Number: <input type="text" value="<?php echo $phone;?>" name="phone"/><br />
    Class: <input type="text" value="<?php echo $class;?>" name="class"/><br />
    Address: <input type="text" value="<?php echo $address;?>" name="address"/><br />
    City: <input type="text" value="<?php echo $city;?>" name="city"/> <br />
    State: <input type="text" value="<?php echo $state;?>" name="state"/><br />
    Zip: <input type="text" value="<?php echo $zip;?>" name="state"/><br />
    DOB: <input name="state" type="text" value="<?php echo $birthmonth;?>" size="20"/> <input name="state" type="text" value="<?php echo $birthday;?>" size="5"/> <input name="state" type="text" value="<?php echo $birthyear;?>" size="5"/><br>
    School: <input name="state" type="text" value="<?php echo $school;?>" /><br />
<input name="submit" type="submit" value="Edit Student" />
</form>

    </p>
  </div>
  <!-- End Content Column -->
  <!-- Begin Right Column -->
  <div id="rightcolumn">
    <div align="center"><font size="4">Other Tools</font><br />  <div id="menu">
  <ul>
    <li><a href="email.php">Email Developer</a></li>
    <li><a href="http://www.paypal.com">PayPal Management</a></li>
    </ul>
</div>
    </div>
  <p>
  </p>
  </p>
  </div>
<hr noshade>
  <!-- End Right Column -->
  <!-- Begin Footer -->
  <div id="footer"><b><font color="white">Online Driving School Management 2.00</font></b></div>
  <!-- End Footer -->
</div>
<!-- End Wrapper -->
</body>
</html>

Getting the following errors

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home2/safetyfi/public_html/secure/managementv2/editinfo.php on line 8

Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /home2/safetyfi/public_html/secure/managementv2/editinfo.php on line 27

Can anyone tell me what is wrong?

Mchl · October 21, 2009

Most common reason for this error message is an error with your query. Try echoing mysql_error

In your case you're not running query at all... See mysql_query

cags · October 21, 2009

Mchl is certainly correct with the easiest method to diagnose the problem. But I can go one step further... mysql_fetch_array expects the argument passed to it to be the result of a successfull cal to mysql_query, but you are just passing it a query string. You want something more like this...

$result = mysql_query("select * from Students where ID = $SID");
while ($row = mysql_fetch_array($result)){

Mchl · October 21, 2009

In fact mysql_error would not help here at all, as there was no query sent to server

cags · October 21, 2009

lol, oh yes, good point. ::)

Jaguar · October 21, 2009

Also you just FYI you should use

$SID = mysql_escape_real_string($SID);

Your script right now would be very easy to exploit. Someone could drop/delete your students table.

Mchl · October 21, 2009

Actually this reminds me of...

And the function after or in line 5 is called mysql_error() not mysqlerror()

CrownVictoriaCop · October 21, 2009

Thanks guys for your advice. Here's my new code:

<?php

$SID = $_POST['id'];

mysql_connect("localhost","safetyfi_secure","hidden") or die("Error: ".mysql_error());
mysql_select_db("safetyfi_students"); 

$result = mysql_query("select * from Students where ID = $SID");
while ($row = mysql_fetch_array($result)){

$id = $row['ID'];
$studentname = $row['StudentName'];
$parentfirstname = $row['ParentFirstName'];
$lastname = $row['ParentLastName'];
$class = $row['Class'];
$address = $row['Address'];
$city = $row['City'];
$state = $row['State'];
$zip = $row['ZIP'];
$phone = $row['Phone'];
$school = $row['School'];
$birthmonth = $row['BirthMonth'];
$birthday = $row['BirthDay'];
$birthyear = $row['BirthYear'];
$paymentmethod = $row['PaymentMethod'];

}
mysql_free_result($result);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>ODISM Instructor Control Panel</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<link rel="stylesheet" href="menu.css" type="text/css" />
<script type="text/javascript">
<!--
function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
    } if (errors) alert('The following error(s) occurred:\n'+errors);
    document.MM_returnValue = (errors == '');
} }
//-->
</script>
</head>
<body>
<!-- Begin Wrapper -->
<div id="wrapper">
  <!-- Begin Header -->
  <div id="header">
    <h1><img src="banner.png" width="907" height="100" alt="Imponente Web Services" /></h1>
  </div>
  <!-- End Header -->
  <!-- Begin Left Column -->
  <div id="leftcolumn">
     <div align="center"><font size="4">Student Management</font><br />
    </div>
  <div id="menu">
  <ul>
    <li><a href="directory.php">List Students</a></li>
    <li><a href="addstudent.php">Add Student</a></li>
    <li><a href="editstudent.php">Edit Student</a></li>
    <li><a href="deletestudent.php">Delete Student</a></li>
    </ul>
</div></div>
  <!-- End Left Column -->
  <!-- Begin Content Column -->
  <div id="content">
    <p>Edit Student</p>
    <br />
    <p>The student record is displayed below for you to edit.</p>
    <br />
<form action="updateinfo.php" method="post">

  <p>Student's First Name:
  <input type="text" value="<?php echo $studentname;?>" name="studentname"/><br />
    Parent's First Name: <input type="text" value="<?php echo $parentfirstname;?>" name="parentfirstname"/><br />
    Parent's Last Name: <input type="text" value="<?php echo $lastname;?>" name="lastname"/><br />
    Phone Number: <input type="text" value="<?php echo $phone;?>" name="phone"/><br />
    Class: <input type="text" value="<?php echo $class;?>" name="class"/><br />
    Address: <input type="text" value="<?php echo $address;?>" name="address"/><br />
    City: <input type="text" value="<?php echo $city;?>" name="city"/> <br />
    State: <input type="text" value="<?php echo $state;?>" name="state"/><br />
    Zip: <input type="text" value="<?php echo $zip;?>" name="state"/><br />
    DOB: <input name="state" type="text" value="<?php echo $birthmonth;?>" size="20"/> <input name="state" type="text" value="<?php echo $birthday;?>" size="5"/> <input name="state" type="text" value="<?php echo $birthyear;?>" size="5"/><br>
    School: <input name="state" type="text" value="<?php echo $school;?>" /><br />
<input name="submit" type="submit" value="Edit Student" />
</form>

    </p>
  </div>
  <!-- End Content Column -->
  <!-- Begin Right Column -->
  <div id="rightcolumn">
    <div align="center"><font size="4">Other Tools</font><br />  <div id="menu">
  <ul>
    <li><a href="email.php">Email Developer</a></li>
    <li><a href="http://www.paypal.com">PayPal Management</a></li>
    </ul>
</div>
    </div>
  <p>
  </p>
  </p>
  </div>
<hr noshade>
  <!-- End Right Column -->
  <!-- Begin Footer -->
  <div id="footer"><b><font color="white">Online Driving School Management 2.00</font></b></div>
  <!-- End Footer -->
</div>
<!-- End Wrapper -->
</body>
</html>

But I'm still getting the same errors

cags · October 21, 2009

Try replacing...

$result = mysql_query("select * from Students where ID = $SID");

... with...

$sql = "select * from Students where ID = $SID";
$result = mysql_query($sql) or trigger_error("SQL: $sql, ERROR: " . mysql_error(), E_USER_ERROR);

CrownVictoriaCop · October 21, 2009

Try replacing...

$result = mysql_query("select * from Students where ID = $SID");

... with...

$sql = "select * from Students where ID = $SID";
$result = mysql_query($sql) or trigger_error("SQL: $sql, ERROR: " . mysql_error(), E_USER_ERROR);

Doing this brings the up the error

Fatal error: SQL: select * from Students where ID = , ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 in /home2/safetyfi/public_html/secure/managementv2/editinfo.php on line 9

cags · October 21, 2009

$SID has no value.

Mchl · October 21, 2009

Which in turn means $_POST['id'] has no value. There might be a problem with the form you're using to pass information to this script.

CrownVictoriaCop · October 21, 2009

Hmmm...here's the form I am using.

<form action="editinfo.php">
Student ID: <input name="id" type="text" >
<input type="submit">
</form>

Mchl · October 21, 2009

Change

<form action="editinfo.php">

to

<form action="editinfo.php" method="post">

cags · October 21, 2009

Edit: d'oh

CrownVictoriaCop · October 21, 2009

It works! Thank you guys so much! You guys deserve something in return for this.

One thing is for sure - I'll never use Dreamweaver's form generator again - it didn't put my post method in for some reason.

Thank you, thank you, thank you!

Anthony

Mchl · October 21, 2009

Just remember to use mysql_real_escape_string on $SID.

CrownVictoriaCop · October 21, 2009

I'll be sure to do that. It's for an administration area, though, that is secured by 401 authorization.

Mchl · October 21, 2009

Costs you nothing and adds another layer of security.

Sign In

Supplied Argument is not valid MySQL Resource

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