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PHP Databases Using PHP in conjunction with databases. PHP questions not specific to databases should be directed to one of the other PHP forums.
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Old April 10th, 2004, 12:35 AM
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Default database errors

Hi,
I am a newbie at php, and I was following an example in the php book.

I keep getting an error:
Fatal error: Call to undefined function: error_message() in c:\inetpub\wwwroot\userviewer.php on line 11
Below is the code I used:
--------------------------------------------------------


<?php
include "./common_db.inc";
function list_records() {
   global $default_dbname, $user_tablename;
   global $default_sort_order, $default_order_by, $records_per_page;
   global $sort_order, $order_by, $cur_page;
   global $PHP_SELF;

   $link_id = db_connect($default_dbname);
   if(!$link_id) error_message(sql_error());

   $query = "SELECT count(*) FROM $user_tablename";

   $result = mysql_query($query);
   if(!$result) error_message(sql_error());

   $query_data = mysql_fetch_row($result);
   $total_num_user = $query_data[0];
   if(!$total_num_user) error_message('No User Found!');
   $page_num = $cur_page + 1;

   $total_num_page = $last_page_num
                   = ceil($total_num_user/$records_per_page);

   html_header();

   echo "<CENTER><H3>$total_num_user users found. Displaying the page
                     $page_num out of $last_page_num.</H3></CENTER>\n";

   if(empty($order_by)) {
      $order_by_str = "ORDER BY $default_order_by";
      $order_by = $default_order_by;
   }
   else $order_by_str = "ORDER BY $order_by";
   if(empty($sort_order)) {
      $sort_order_str = $org_sort_order = $default_sort_order;
      $sort_order = 'DESC';
   }
   else {
      $sort_order_str = $org_sort_order = $sort_order;
      if($sort_order == 'DESC') $sort_order = 'ASC';
      else $sort_order = 'DESC';
   }

   if(empty($cur_page)) {
      $cur_page = 0;
   }
     $limit_str = "LIMIT ". $cur_page * $records_per_page .
                                     ", $records_per_page";
   $query = "SELECT usernumber, userid, username FROM $user_tablename
                                  $order_by_str $sort_order_str $limit_str";

   $result = mysql_query($query);
   if(!$result) error_message(sql_error());
?>

<DIV ALIGN="CENTER">
<TABLE BORDER="1" WIDTH="90%" CELLPADDING="2">
   <TR>
      <TH WIDTH="25%" NOWRAP>
         <A HREF="<?php echo "$PHP_SELF?action=list_records&
                                  sort_order=$sort_order&
                                  order_by=usernumber"; ?>">
         User Number
         </A>
      </TH>
      <TH WIDTH="25%" NOWRAP>
         <A HREF="<?php echo "$PHP_SELF?action=list_records&
                                     sort_order=$sort_order&
                                     order_by=userid"; ?>">
         User ID
         </A>
      </TH>
      <TH WIDTH="25%" NOWRAP>
         <A HREF="<?php echo "$PHP_SELF?action=list_records&
                                     sort_order=$sort_order&
                                     order_by=username"; ?>">
            User Name
         </A>
      </TH>
      <TH WIDTH="25%" NOWRAP>Action</TH>
   </TR>
<?php

   while($query_data = mysql_fetch_array($result)) {
      $usernumber = $query_data["usernumber"];
      $userid = $query_data["userid"];
      $username = $query_data["username"];
      echo "<TR>\n";
      echo "<TD WIDTH=\"25%\" ALIGN=\"CENTER\">$usernumber</TD>\n";
      echo "<TD WIDTH=\"25%\" ALIGN=\"CENTER\">$userid</TD>\n";
      echo "<TD WIDTH=\"25%\" ALIGN=\"CENTER\">$username</TD>\n";
      echo "<TD WIDTH=\"25%\" ALIGN=\"CENTER\">
            <A HREF=\"javascript:open_window('$PHP_SELF?action=vi ew_record&
            userid=$userid');\">View Record</A></TD>\n";
      echo "</TR>\n";
   }
?>
</TABLE>
</DIV>
<?php
   echo "<BR>\n";
   echo "<STRONG><CENTER>";
   if($page_num > 1) {
      $prev_page = $cur_page - 1;

      echo "<A HREF=\"$PHP_SELF?action=list_records&
                                sort_order=$org_sort_order&
                                order_by=$order_by&cur_page=0\">[Top]</A>";

      echo "<A HREF=\"$PHP_SELF?action=list_records&
                                sort_order=$org_sort_order&
                                order_by=$order_by&
                                cur_page=$prev_page\">[Prev]</A> ";
   }
   if($page_num < $total_num_page) {
      $next_page = $cur_page + 1;
      $last_page = $total_num_page - 1;

      echo "<A HREF=\"$PHP_SELF?action=list_records&
                                sort_order=$org_sort_order&
                                order_by=$order_by&
                                cur_page=$next_page\">[Next]</A> ";

      echo "<A HREF=\"$PHP_SELF?action=list_records&
                                sort_order=$org_sort_order&
                                order_by=$order_by&
                                cur_page=$last_page\">[Bottom]</A>";
   }

   echo "</STRONG></CENTER>";
   html_footer();
}

function view_record() {
   global $default_dbname, $user_tablename, $access_log_tablename;
   global $userid;
   global $PHP_SELF;

   if(empty($userid)) error_message('Empty User ID!');

   $link_id = db_connect($default_dbname);

   if(!$link_id) error_message(sql_error());

   $query = "SELECT usernumber, userid, username,
                    usercountry, useremail, userprofile,
                    registerdate, lastaccesstime FROM $user_tablename
                    WHERE userid = '$userid'";
   $result = mysql_query($query);

   if(!$result) error_message(sql_error());

   $query_data = mysql_fetch_array($result);
   $usernumber = $query_data["usernumber"];
   $userid = $query_data["userid"];
   $username = $query_data["username"];
   $usercountry = $query_data["usercountry"];
   $useremail = $query_data["useremail"];
   $userprofile = $query_data["userprofile"];
   $registerdate = $query_data["registerdate"];

   $lastaccesstime = substr($query_data["lastaccesstime"], 0, 4) . '-' .
            substr($query_data["lastaccesstime"], 4, 2) . '-' .
            substr($query_data["lastaccesstime"], 6, 2) . ' ' .
            substr($query_data["lastaccesstime"], 8, 2) . ':' .
            substr($query_data["lastaccesstime"], 10, 2) . ':' .
            substr($query_data["lastaccesstime"], 12, 2);

   html_header();
   echo "<CENTER><H3>
         Record for User No.$usernumber - $userid($username)
         </H3></CENTER>";

?>
<DIV ALIGN="CENTER">
<TABLE BORDER="1" WIDTH="90%" CELLPADDING="2">
   <TR>
      <TH WIDTH="40%">Country</TH>
      <TD WIDTH="60%"><?php echo $usercountry ?></TD>
   </TR>
   <TR>
      <TH WIDTH="40%">Email</TH>
      <TD WIDTH="60%"><?php echo "<A HREF=\"mailto:$useremail\">$useremail</A>"; ?></TD>
   </TR>
   <TR>
      <TH WIDTH="40%">Profile</TH>
      <TD WIDTH="60%"><?php echo $userprofile ?></TD>
   </TR>
   <TR>
      <TH WIDTH="40%">Register Date</TH>
      <TD WIDTH="60%"><?php echo $registerdate ?></TD>
   </TR>
   <TR>
      <TH WIDTH="40%">Last Access Time</TH>
      <TD WIDTH="60%"><?php echo $lastaccesstime ?></TD>
   </TR>
</TABLE>
</DIV>
<?php
   echo "\n";
   $query = "SELECT page, visitcount, accessdate FROM $access_log_tablename
             WHERE userid = '$userid'";

   $result = mysql_query($query);
   if(!$result) error_message(sql_error());
   if(!mysql_num_rows($result))
      echo "<CENTER>No access log record for $userid ($username).</CENTER>";
   else {
      echo "<CENTER>Access log record(s) for $userid ($username).</CENTER>";
?>
<DIV ALIGN="CENTER">
<TABLE BORDER="1" WIDTH="90%" CELLPADDING="2">
   <TR>
      <TH WIDTH="40%" NOWRAP>Web Page</TH>
      <TH WIDTH="20%" NOWRAP>Visit Counts</TH>
      <TH WIDTH="40%" NOWRAP>Last Access Time</TH>
   </TR>
<?php
      while($query_data = mysql_fetch_array($result)) {
         $page = $query_data["page"];
         $visitcount = $query_data["visitcount"];
         $accessdate = substr($query_data["accessdate"], 0, 4) . '-' .
                  substr($query_data["accessdate"], 4, 2) . '-' .
                  substr($query_data["accessdate"], 6, 2) . ' ' .
                  substr($query_data["accessdate"], 8, 2) . ':' .
                  substr($query_data["accessdate"], 10, 2) . ':' .
                  substr($query_data["accessdate"], 12, 2);

         echo "<TR>\n";
         echo "<TD WIDTH=\"40%\">$page</TD>\n";
         echo "<TD WIDTH=\"20%\" ALIGN=\"CENTER\">$visitcount</TD>\n";
         echo "<TD WIDTH=\"40%\" ALIGN=\"CENTER\">$accessdate</TD>\n";
         echo "</TR>\n";
      }
?>
   </TR>
</TABLE>
</DIV>
<?php

   }

   html_footer();
}

switch($action) {
   case "view_record":
      view_record();
   break;
   default:
      list_records();
   break;
}
?>



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  #2 (permalink)  
Old April 10th, 2004, 08:14 AM
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There is no function called error_message(). Perhaps you should replace it with die().

HTH,

Snib

P2P Member
<><
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  #3 (permalink)  
Old April 16th, 2005, 05:05 PM
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Check your spelling,make sure you have the correct name of the function and the sysntax.
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