Question

I have a mysql result (having many rows) that I will use later. For now, I only need to access (sum) the first 5 rows. The problem is that the rows were saved from the query using “AS”, so now they can be accessed by using $row['name'] . How can I select the first 5 rows without using the “name” for each of them?

Is there any way for doing like so:

PHP:

for($i=0;$i<5;++$i)
   echo $row[$i];

?

EDIT
Sorry, my question was wrong.
Actually: How can I use the same $result 2 times without loosing the values by fetching the array?

Answer 1

What do you use for working with DB? PDO? MySQLi? MySQL extension?

If you use MySQL extension (mysql_connect(), mysql_query() etc), you can use mysql_data_seek() to move the internal row pointer of the MySQL result:

$res = mysql_query($sql);
if ( mysql_num_rows($res) ) {
    // process first 5 lines
    for ( $n = 0; $n < 5; ++$n ) {
        $row = mysql_fetch_assoc($res);
        if ( $row === false ) {
            break;
        }
        // do something with $row
        // ...
    }
    // reset pointer
    mysql_data_seek($res, 0);
    // process all rows
    while ( $row = mysql_fetch_assoc($res) ) {
        // do something with $row
        // ...
    }
}
mysql_free_result($res);

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Another option would be to fetch all results into an array and then work with that array. I can’t think of any benefit of holding MySQL resource opened.