I’m using the PHP script below for an experiment I am conducting, however it seems to error out with the error message: “Unknown column ‘time_submit109’ in ‘field list'” when it gets to the digit span task (around page 110). How do I resolve this error (I’m not well versed in PHP so I’m having a hard time debugging this). I think the error is related to the time_submit1 variable.
<?php
//counter for dynamic timestamp and next_page
$counter_page = ++$counter+1;
//connect to db server
mysql_connect($host,$user,$password) or die('Unable to connect to database server<br>'.mysql_error());
//if this is the first page of a survey
if (!isset ($identification))
//create db, if not already there
{
mysql_query("CREATE DATABASE IF NOT EXISTS $database");
}
//select db
mysql_select_db($database) or die('Unable to select database<br>'.mysql_error());
if (!isset ($identification))
{
//create table, if not already there
mysql_query ("CREATE TABLE $table (identification int(9) NOT NULL auto_increment,
page1 TEXT, participation_date DATE, time_submit1 VARCHAR(8), ip_number VARCHAR(15),
browser TINYTEXT, PRIMARY KEY (identification)) TYPE=MyISAM");
}
//change array, so that time_submit and page are renamed dynamically
foreach($variablen as $name=>$value)
{
if ($name == "next_page")
{
$name = "page".$counter_page;
}
elseif ($name == "counter")
{
$name = "time_submit".$counter;
$value = date("G:i:s");
}
$newarray2[$name]=$value;
}
$variablen = $newarray2;
//for each line in the array of submitted variables do the following (traverse array)
foreach($variablen as $name=>$value)
{
//modify table step by step (add colums according to html input)
mysql_query ("ALTER TABLE $table ADD $name VARCHAR(255)");
}
if (!isset ($identification))
{
//insert new record into db table (into the referer field) and thus generate identifcation (new record)
mysql_query("INSERT INTO $table (page1, participation_date, time_submit1, ip_number, browser)
VALUES ('$referer', '".date("Y-m-d")."', '".date("G:i:s")."',
'".$_SERVER['REMOTE_ADDR']."', '".$_SERVER['HTTP_USER_AGENT']."')")or die('Unable to insert into table!<br>'.mysql_error());
//grab last value of auto-increment variable "identification" to be used as identifier
$identification = mysql_insert_id();
}
//for each line in the array of submitted variables do the following
foreach($variablen as $name=>$value)
{
//update db table step by step
mysql_query("UPDATE $table SET $name='".mysql_real_escape_string($value)."' WHERE identification=$identification") or die('Unable to update table1<br>'.mysql_error());
}
//close connection
mysql_close();
//if this is the last html page: feedback for the participant
if (!isset ($next_page))
{
echo $thank_you_text;
}
//if questionnaire consists of still another html page
else
{
//call up next HTML page and pass on ID and counter
echo "<html><head></head><body onLoad=\"javascript:location.replace('".$next_page."?op56=".$identification."&nr93=".$counter."')\">
<a href=\"".$next_page."?op56=".$identification."&nr93=".$counter."\">Next Page</a></body></html>";
//manual forwarding
//echo "<html><head></head><body><a href=\"".$next_page."?op56=".$identification."&nr93=".$counter."\">Next Page</a></body></html>";
}
?>
Not really a solution but the problem is pointing out to the fact that you are referencing a field name that is not part of the table. Check the arrays and make sure that the field names do exist in the tables