[RESOLVED] undefined index && undefined variable problem

lisa99

Hi all. I'm very new to PHP. I just don't get how it can be undefined when the error shows the actual definition.

Notice: Undefined index: 1234567890 in ******searchbynumber.php on line 10

1234567890 is the definition of the variable there passed using method="post" from the form on the previous page.

Also...getting this error:

Notice: Undefined variable: row in ******searchbynumber.php on line 24

Here's the code: Can someone give me some pointers?

<?php
error_reporting(E_ALL); 							//ERROR REPORTING FOR DEBUGGING!!!
session_start(); 									// start session
if(!isset($_SESSION['insession']))					// if session is not set
    header ('Location: sessionerr.php');			// kick 'em out to sessionerr.php

else    

echo "Searching.  Please wait.";					// if they started on the right page, continue.

$stickernumber = $_POST["$stickernumber"];			// get the value of stickernumber from the last page 

include("dbconnect.php");							// connect to database

$sql="SELECT `recordtype` FROM `stickertable` WHERE `stickernumber` = $stickernumber";  // execute mysql query
$result=mysql_query($sql);  // store query result into $result
$_SESSION['sessionstickernumber']="$stickernumber"; // store $stickernumber into session for passing to next page to search by...

if ($result && (mysql_num_rows($result)!= 0)) {  // as long as something is found...
$row = mysql_fetch_array($result);				 // store it into $row 
}

//now to redirect depending on the value of $recordtype...

switch($row['recordtype']) {			// establish switch for multiple case scenario...
case 'child':									// if value is 'child'
header("location:http://www.example.com/child.php"); // redirect here...
break;
case 'adult':									// if value is 'adult'
header("location:http://www.example.com/adult.php"); // redirect here...
break;
case 'pet':										// if value is 'pet'
header("location:http://www.example.com/pet.php"); // redirect here...
break;
default: 										// otherwise default to this...
printf("<br><br>Sorry.  I can not find matching information in the database.<br>\n<a href='javascript:history.go(-1)'>back</a>");
} 
include("dbclose.php");							// disconnect from database
?>

NogDog

It's telling you that the variable $stickernumber has a value of 1234567890, but that there is no array element in $POST with an index of that value. I'm guessing that you have the deprecated register_globals option turned on, thus causing PHP to populate that variable with the value from the POST data for that form field name. What I think you really wanted to do is:

$stickernumber = $_POST["stickernumber"]; // No "$" in the array key

The error at line 24 is probably because the preceding if() condition is failing, and thus $row is never set.

lisa99

Yep. That was it. I totally missed that. 😃

The other error about $row went away.

In case another newbie wants to copy that script, it won't work unless you remove the line:

echo "Searching. Please wait."

Here's the working script if it helps someone...

<?php
#error_reporting(E_ALL); 							//ERROR REPORTING FOR DEBUGGING!!!
session_start(); 									// start session
if(!isset($_SESSION['insession']))					// if session is not set
    header ('Location: sessionerr.php');			// kick 'em out to sessionerr.php

$stickernumber = $_POST["stickernumber"];			// get the value of stickernumber from the last page 

include("dbconnect.php");							// connect to database

$sql="SELECT `recordtype` FROM `stickertable` WHERE `stickernumber` = $stickernumber";  // execute mysql query
$result=mysql_query($sql);  						// store query result into $result
$_SESSION['sessionstickernumber']="$stickernumber"; // store $stickernumber into session for passing to next page to search by...

if ($result && (mysql_num_rows($result)!= 0)) {  	// as long as something is found...
$row = mysql_fetch_array($result);				 	// store it into $row 
}

//now to redirect depending on the value of $recordtype...

switch($row['recordtype']) {					// establish switch for multiple case scenario...
case 'child':									// if value is 'child'
header("location:child.php"); 					// redirect here...
break;
case 'adult':									// if value is 'adult'
header("location:adult.php"); 					// redirect here...
break;
case 'pet':										// if value is 'pet'
header("location:pet.php"); 					// redirect here...
break;
default: 										// otherwise default to this...
printf("<br><br>Sorry.  I can not find matching information in the database.<br>\n<a href='javascript:history.go(-1)'>back</a>");
} 
include("dbclose.php");							// disconnect from database
?>

and to recall "sessionstickernumber" back on the next page:

<?php
#error_reporting(E_ALL); 							//ERROR REPORTING FOR DEBUGGING!!!
session_start(); 									// start session
if(!isset($_SESSION['insession']))					// if session is not set
    header ('Location: sessionerr.php');			// kick 'em out to sessionerr.php

$stickernumber=$_SESSION['sessionstickernumber'];

echo "adultpage";

echo "<br>$stickernumber";
?>

HOORAY! IT WORKS!

Many thanks. 😃