Array variables in MySQL UPDATES
 

I'm trying to use a MYSQL fieldname as a key in an indexed array .. Maybe there is something basic I'm missing?

The statement : $sql13 = mysql_query("UPDATE $table1 SET recored1 = '$arrayvalue[ID]' " ); just refuses to place the correct arrayvalue in the table1. (no failure .. it just places a o.oo value in the records.

ID is in integer record in $table1.
$arrayvalue is an indexed array with a 100 or so values

Not sure if i'm very dumb or just too smart (prob the former) ?

Assuming $arrayvalue['ID'] contains a legitimate value beforehand, try the following query:

I tried using the suggested notation <THEVALUE = '".$arrval['ID']."'> but no go ... HMMMM something really basic here that is escaping me .. Attached is a working program that demonstrates the problem .. Basically I see that the basic question is "How do you copy an array into a table?" ..

<?php
echo " learn about arrays <p>";

/* declare some relevant variables */
$DBhost = "localhost";
$DBuser = "bob";
$DBpass = "uhoo_babyloo";
$DBName = "thetest_db";
$table = "temptable";

$arrval = array(.01,101,202,303,404,5.05,6.06,7,8.08,9.09,10.1);

mysql_connect($DBhost,$DBuser,$DBpass) or die("Unable toconnect to database");
@mysql_select_db("$DBName") or die("Unable to select database $DBName");
echo "found the database successfully <br>";

$sql2 = mysql_query("DROP TABLE $table") or die ('DROP table failed');
$sq14 = mysql_query("CREATE TABLE $table
(ID INT UNSIGNED NOT NULL,
THEVALUE decimal(8,2)NOT NULL,
PRIMARY KEY (ID))")
or die ("Create table failed");

$sql5 = mysql_query("INSERT into $table(ID) VALUES ('0')") or die ("INSERT failed");
$sql6 = mysql_query("INSERT into $table(ID) VALUES ('1')") or die ("INSERT failed");

// .......finished creating a sample simple table...............................

// .......now try to copy the array values into the table .. using subscripts ..
for ($i=0; $i<2; $i++)// this works but it is crazy way to do it &^%$# !
{
$sql10 = mysql_query("update $table set THEVALUE = '$arrval[$i]' where (ID = $i) ");
}

//$sql11 = mysql_query("update $table set THEVALUE = '$arrval[ID]' "); // this fails
//$sql12 = mysql_query("update $table set THEVALUE = '$arrval['ID']' "); // this fails
//$sql13 = mysql_query("update $table set THEVALUE = '".$arrval['ID']."' "); // this fails
//$sql14 = mysql_query("update $table set THEVALUE = '".$arrval[ID]."' "); // this fails

$sql20 = mysql_query("select * FROM $table") or die ("Query 12 failed");
while($row=mysql_fetch_row($sql20)) echo "<br>$row[0] .... $row[1]<br>\n";

one more thing
 

it is clear from the test program .... that the problem is that PHP/MYSQL won't accept a fieldname as a subscript to an array variable .. in an SELECT update statement .. Mannnnnn I tried every sort of syntax I could find and *&^%$ zip .. nothin' works .. Now , maybe if I really understood it or had some formal training I could get it ! darn

The $arrval['ID'] doesn't have a value because the $arrval array doesn't have an ID key. With the $arrval array set as follows:
It is equivalent to the following:
You could set the array keys as follows:
And then do something like:
But then all values in the THEVALUE column would be set to $arrval['ID_0'] (.01 in this case) which probably isn't what you want, so you'd need a WHERE clause.