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PHP Notice: Undefined offset ???


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Hi Chaps,


I'm having some trouble with a PHP Form page and an Update Script page.


I've tested this on my Apache server and it works fine, but fails on my 'Live' IIS server:

Form Code:

<input type='text' name='jobpriority[]' value="<?php echo $row_rsWorkload_All['jobpriority'];?>"/>
<?php echo $row['jobcount']; ?>
<?php echo $row_rsWorkload_All['jobpriority'];?>
$table_name = $row_rsWorkload_All['fromtable'];
        $item_id = $row_rsWorkload_All['jobid']; 

<input type="hidden" name="setpriority[]" value="<?php echo $table_name; ?>:<?php echo $item_id; ?>" />

The 'hidden' input did look like this:

<input type="hidden" name="setpriority[]" value="<?php echo $table_name; ?>:<?php echo $item_id; ?>:<?php $_POST ['jobpriority']; ?>" />

But I had to remove the

:<?php $_POST ['jobpriority']

bit to get the page to open on the IIS server.

Since removing the code, the page opens but when I 'click send' to pass the data to the script page, I get this error:

PHP Notice: Undefined offset: 22 in C:\Inetpub\XxxxxXxxxx\NewFiles\Xxxxx\Xxxxx\scripts\script.php on line 64


$allowed_tables = Array('tbl_table1','tbl_table2','tbl_table3'); // to prevent SQL injection
$i = 1;
foreach($_POST['setpriority'] as $var) {
    $arr = explode(':', $var);
    if(in_array($arr[0], $allowed_tables)) {
        $table = $arr[0];
        $rowid = $arr[1];
        $priority = $_POST['jobpriority'][$i];
        if(is_numeric($rowid)) {
            // run your SQL query here to update $table where row matches $rowid
            $query = sprintf("
		UPDATE $table 
		SET jobpriority='$priority' 
		WHERE jobid=$rowid");
            $result = mysql_query($query, $conndb2) or die(mysql_error());
		$mess = $ref = $_SERVER['HTTP_REFERER']; header( 'refresh: 0; url='.$ref);
    else {
  $mess = "<p>There was a problem</p>";

I'm a bit stuck as I have around 10 pages that use the same sort of functionality, so if anyone can help with this, I'd be most grateful!

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Undefined offset usually means about the same thing as undefined index.  And an index is a key in an array.


I noticed in your code you were setting $i to 1... and then adding 1 to it again before you ever even used it.  Which would make the last ... loop's $i value... undefined.


You also could have fixed the problem by putting the $i++ at the end of the loop.. and keeping $i = 1

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