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Bug #3371 dbmfetch reurns an empty string
Submitted: 2000-02-01 06:54 UTC Modified: 2005-03-31 16:13 UTC
From: kredel at rz dot uni-mannheim dot de Assigned:
Status: Wont fix Package: DBM/DBA related
PHP Version: 3.0.12 OS: Linux
Private report: No CVE-ID: None
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From: kredel at rz dot uni-mannheim dot de
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 [2000-02-01 06:54 UTC] kredel at rz dot uni-mannheim dot de
A counter function written in php and using gdbm is no more
working. the dbmfetch funktion returns empty string, while
dbmexists indicates the existence of an string. looking 
into the dbm file shows the value is there. I include first
the output of two different systems (the first is th buggy one) and then the php script.
----------
PHP mit dbm:

Datei: /home4/kredel/public_html/ex51.phtml.

open: 1

key: /home4/kredel/public_html/ex51.phtml

found: ####

put: 1

replace: 1

1 Zugriffe, Ge?ndert am 01 Feb 2000 12:38:08

DB Version: This is GDBM version 1.7.3, as of May 19, 1994.

Hostname: trumpf-5.rz.uni-mannheim.de

Server Software: Apache/1.3.9 (Unix) PHP/3.0.12
----------
PHP mit dbm:

Datei: /home4/kredel/public_html/ex51.phtml.

open: 1

key: /home4/kredel/public_html/ex51.phtml

found: ##129##

put: 130

replace: 130

130 Zugriffe, Ge?ndert am 01 Feb 2000 12:38:08

DB Version: This is GDBM version 1.7.3, as of May 19, 1994.

Hostname: trumpf-4.rz.uni-mannheim.de

Server Software: mod_perl/1.18 Apache/1.3.4 (Unix) (SuSE/Linux) PHP/3.0.7
----------
<?php
$filename=$SCRIPT_FILENAME;
function modified($lang) {
        global $filename;
        $lm=date("d M Y H:i:s",filectime($filename));
        if ($lang=="de") {
           return "Ge&auml;ndert am $lm";
        } else {
           return "Last modified: $lm";
        }
}

$filename=$SCRIPT_FILENAME;
$counter_start="1";
function counter() {
        global $filename, $counter_start;
        $counter_dir="/tmp/";
        $counter_db=$counter_dir . "zaehler.dbm";
        if (file_exists("$counter_db")) {
           $db=dbmopen($counter_db,"w");
           echo "<p>open: $db</p>";
           echo "<p>key: $filename</p>";
           if ( dbmexists($db,$filename) ) {
               $cnt=dbmfetch($db,$filename);
               echo "<p>found: ##$cnt##</p>";
               if ($counter_start=="1") { $cnt++; } 
               else { $cnt=$counter_start; }
               echo "<p>put: $cnt</p>";
               dbmreplace($db,$filename,$cnt);
               echo "<p>replace: $cnt</p>";
           }
           else {
               $cnt=$counter_start;
               dbminsert($db,$filename,$cnt);
           }
           dbmclose($db); 
           return "$cnt";
        }
        else {
           echo "Attempt to create file: " . $counter_db;
           $cnt=$counter_start;
           $db=dbmopen($counter_db,"n");
           dbminsert($db,$filename,$cnt);
           dbmclose($db);
           return "$cnt";
        }
}
?>

<html>
<head>
<title>php dbm</title>
</head>
<body>
<p>PHP mit dbm:</p>
<p>
<?php 

  /* $counter_start="9999"; */
  echo "<h3>Datei: $SCRIPT_FILENAME.</h3>"; 
  echo "<h3>" . counter(). " Zugriffe,";
  echo " " . modified("de") . "</h3>"; 

  $yyy=dblist();
  echo "<p>DB Version: $yyy</p>";

  echo "<p>Hostname: $HTTP_HOST</p>";
  echo "<p>Server Software: $SERVER_SOFTWARE</p>";

?>

</body>
----------

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