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How to Loop through a recordset with a counter

Posted on 2008-06-22
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Last Modified: 2012-06-27
I am totally new to php, and after hours cannot figure this out.
I have this code (sample #1) to get a recordset that has one column, and loop through it. It work find
My problem is that I must build a moving average based on the values in the recordset.  Do do so, I want to loop through the recordset using a counter like in Sample #2

 
Sample #1

$rsMA = odbc_exec($conn,$sql);

while($row = odbc_fetch_array($rsMA))

{echo $row['Close'];}

Sample #2

for($i=1; $i < 200; $i++) {

  	echo $row[$1];

}

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Question by:rrhandle8
  • 2
3 Comments
 
LVL 11

Expert Comment

by:spoxox
ID: 21843350
See $count and $tally in the snippet.
<?php 

//connect to MySQL

  $username = "eeuser";

  $password = "eepw";         

  $hostname = "localhost";

  $dbconn   = mysql_connect($hostname, $username, $password) or die("Unable to connect to MySQL");
 

//connect to one MySQL database

  $database = mysql_select_db("eedatabase",$dbconn);
 

//text of the query to execute against the database 

  $query    = "SELECT aKey, aName, anAmount FROM aTable";
 

//execute the query, store the result set

  $result   = mysql_query($query) or die(mysql_error());

 

  $count = 0;

  $tally = 0;

//access all the data, one row at a time

  while ($row = mysql_fetch_array($result)) {

    echo $row["aKey"] . ' '. $row["aName"];

    $count++;  // will count each row

    $tally += $row["anAmount"];  // will add up all anAmount fields

    

  }
 

   mysql_close($dbconn);

?>

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Author Comment

by:rrhandle8
ID: 21843384
ERROR:
Warning: mysql_fetch_array(): supplied resource is not a valid MySQL result resource

I am using ODBC to connect to an Access database.  Does that make a difference?
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Accepted Solution

by:
spoxox earned 125 total points
ID: 21846110
Yes; sorry, didn't pay attention to that. The mysql_* stuff is particular to MySQL. Just replace it with the appropriate ODBC stuff, something like the attached snippet.
//something like this SQL:

$sql = "select Close, anAmount from someTable";
 

$rsMA = odbc_exec($conn,$sql);
 

$count = 0;

$tally = 0;
 

while($row = odbc_fetch_array($rsMA)) {

  echo $row['Close'];

  $count++;  // will count each row

  $tally += $row["anAmount"];  // will add up all anAmount fields

}

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