Undefined offset error in php code.

[nicy12]

Hi! my name is Peter. iam working on the php platform.
while trying to run and compile a program i get the undefined offset error
iam nto much familiar with this error . Please help me . Thanks in advance.
Error: Undefined offset: 0 in /es/ePrintsStats/includes/inc.html.cumula tive_usage.es.p hp on line 16
The code:

<?php
        $current_year = date("Y");
        $last_year = date("Y")-1;
 
?>
<p>Most viewed eprints:
[<a href="<?php print $_SERVER['PHP_SELF']; ?>?action=show_detail_date;range=4w">Past four weeks</a>]
[<a href="<?php print $_SERVER['PHP_SELF']; ?>?action=show_detail_date;year=<?php print $current_year; ?>">This year</a>]
[<a href="<?php print $_SERVER['PHP_SELF']; ?>?action=show_detail_date;year=<?php print $last_year; ?>">Last year</a>]
[<a href="<?php print $_SERVER['PHP_SELF']; ?>?action=show_detail_date">All years</a>]
<br />Repository-wide statistics:
[<a href="<?php print $_SERVER['PHP_SELF']; ?>?action=cumulative_usage;range=all">by Year/month</a>]
[<a href="<?php print $_SERVER['PHP_SELF']; ?>?action=cumulative_usage_country">by Country</a>]
</p>
<?php
            $max_count = $GLOBALS["db_values"][0]["abstracts"];
            for ($rs=0;$rs<count($GLOBALS["db_values"]);$rs++)
        {
                if($max_count < $GLOBALS["db_values"][$rs]["abstracts"])
                        $max_count = $GLOBALS["db_values"][$rs]["abstracts"];
        }
        $max_width = '500'; // Max pixel width of barchart.
 
@ 
print '<font face="Arial" size="-1">Click on a month to see document downloads for that month.</font>';
print "<table>\n";
        print '<tr><th bgcolor="#cccccc">Periods</th>
                <th bgcolor="#66ddee">Abstracts</th>
                <th bgcolor="#4477dd"><font color="#ffffff">Downloads</th>
                <th bgcolor="#cccccc">&nbsp;</th></tr>';
        for ($rs=0;$rs<count($GLOBALS["db_values"]);$rs++)
        {
                $monthnum = (int) strpos('JanFebMarAprMayJunJulAugSepOctNovDec', $GLOBALS["db_values"][$rs]["month"])/3 + 1;
                print '<tr><td><font face="Arial" size="-1"><a href="'.
                        $_SERVER['PHP_SELF'].
                        '?action=show_detail_date;year='.
                        $GLOBALS["db_values"][$rs]["year"].
                        ';month=' .
                        $monthnum .
                        '">' .
                        $GLOBALS["db_values"][$rs]["year"].
                        ' '.
                        $GLOBALS["db_values"][$rs]["month"].
                        '</a></font></td><td align="right"><font face="Arial" size="-1">'.
                        $GLOBALS["db_values"][$rs]["abstracts"].
                        '</font></td><td align="right"><font face="Arial" size="-1">'.
                        $GLOBALS["db_values"][$rs]["downloads"].
                        '</font></td>';
                $cur_count = $GLOBALS["db_values"][$rs]["abstracts"];
 $col_width = (int) ($cur_count/$max_count * $max_width);
$col_width = max($col_width, 1);
                $col_width .= "px";
                print '<td align="left"><img src="bars/hh.png" alt="abstracts" height="9" width="'.
                        $col_width .
                        '"><br />';
                $cur_count = $GLOBALS["db_values"][$rs]["downloads"];
                $col_width = (int) ($cur_count/$max_count * $max_width);
                $col_width = max($col_width, 1);
                $col_width .= "px";
print '<img src="bars/hp.png" alt="downloads" height="9" width="'.
$col_width .
                        '"></td></tr>';
        }
        print "</table>\n";
?>
 

[ronverdonk]

Please read the Posting Guidelines before you post in this forum! Especially the part about enclosing code within code or php tags!

And what is line 16?

Ronald :cool:

[nicy12]

Please read the Posting Guidelines before you post in this forum! Especially the part about enclosing code within code or php tags!

And what is line 16?

Ronald :cool:

Thanks for the Reply,

line 16 is $max_count = $GLOBALS["db_values"][0]["abstracts"];
Undefined offset: 0 is the error that i come accross in the above line (line 16).

[bolo]

Okay .. think I'm just staring at this too long .. I have a random banner script that works just fine .. except one line is generating Undefined offset: 1 errors ...

The full script is ..

<?php
 
 
$banner_File = "754.txt" ; 
$total_Bannersize = 8 ;        
 
 
 
$rnd_Value = Get754(0, $total_Bannersize-1);
$banner_Data = Get754Info($banner_File, $rnd_Value) ;
 
$Banner = split("::",$banner_Data);
 
$banner_Content = <<<content
 
<!-- Banner Ads Start -->
<a title="$Banner[2]" href="$Banner[1]" target="_blank"> <img name="Banner" src="$Banner[0]" alt = "$Banner[2]" border=0>
</a>
<!-- Banner Ads Ends -->
 
content;
 
echo  $banner_Content  ;
 
 
function Get754Info($filename, $line_number) {
 
         $fp = @fopen($filename, "r")
                or die ("Can't open file $filename on Line: " . __LINE__ . " in File: " . __FILE__);
 
         $lnCounter = 0 ;
 
         while (!feof ($fp)) {
              $data = fgets($fp, 1024);
 
               If ($lnCounter == $line_number){
                       $right_data = $data ;
                       return $right_data ;
                       break;
                 }
 
                 $lnCounter++ ;
        }
}
 
 
function Get754($min, $max){
         $mtime = ((double)microtime()* 100000) ;
         $mtime = explode(" ", $mtime);
         $mtime = floatval($mtime[1]) + floatval($mtime[0]) ;
         $randval = mt_rand($min, $max);
         return ($randval) ;
}
 
?>
 

The line returning the error is Line 50 ..

$mtime = floatval($mtime[1]) + floatval($mtime[0]) ;

What am I not seeing?

Oh .. PHP 5.0.4 ...

Thanks.

-bolo

[Atli]

Hi, bolo, and welcome to TSDN!

You are trying to split a double value by using a space character. A double value has no space characters so it will not be split, but the entire value ends up in array index 0.

function Get754($min, $max){
         // This line will return something like 12345.54321
         $mtime = ((double)microtime()* 100000) ;
 
         // And this line tries to split on " " char, which doesn't exist
         $mtime = explode(" ", $mtime);
 
         // So $mtime[1] doesnt exist, ergo PHP returns a warning.
         $mtime = floatval($mtime[1]) + floatval($mtime[0]) ;
 
         // These two lines apear to be the only relevent lines.
         // The other lines are redundant, from what I can tell.
         $randval = mt_rand($min, $max);
         return ($randval) ;
}
 

[bolo]

Hi Atli ..

YOU are a freakin' genius. Took the lines out. Everything still works. No error.

Thanks.

-bolo

[Atli]

Hi Atli ..

YOU are a freakin' genius. Took the lines out. Everything still works. No error.

Thanks.

-bolo

Glad I could help :)