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Asked: 2026-06-18T05:53:14+00:00

This is gonna be a dumb question, but I’ve been working with this code

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This is gonna be a dumb question, but I’ve been working with this code for years and never stopped to understand the what and why….

This is a very typical query I would copy and edit:

mysql_select_db($database_db, $db);
$query_qry_details = sprintf("Select * from table where id = %s", $KTColParam1_qry_details);
$qry_details = mysql_query($query_qry_details, $db) or die(mysql_error());
$row_qry_details = mysql_fetch_assoc($qry_details);
$totalRows_qry_details = mysql_num_rows($qry_details);

What do all these rows mean?

The first I know looks up the correct database. I have this line before each query on the page….do I need this?

The second row ($query_qry_details) is the query itself. I see that.

Rows 3 and 4 – no clue…

Row 5 is obviously a count of the number rows the query returns.

Thanks in advance as always.

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1 Answer

  1. Editorial Team

    EDITED

    Shortly:

    mysql_select_db(database_name, link_identifier) – Sets the cuurent active database on server that is associated with the specified link identifier.
    sprintf – Return formatted string which acts as a query.
    mysql_query or die – Sends a unique query to the database previously specified or exit from query.
    mysql_fetch_assoc – Returns an associative array that corresponds to the fetched row and moves the internal data pointer ahead.
    mysql_num_rows – Retrieves the number of rows from a result set.

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