mssql_connect
mssql_data_seek will return false AND trigger a warning ('Bad row offset') if you specify a row outside the result set.
You'll need to check beforehand if the row you are trying to seek to exists. Or you can supress the error and look for the false result, depending on your needs.
To check beforehand (where $result is the result fo your query and $seek is the row number you want to seek to):
<?php
$rowcount = mssql_num_rows($result);
if ($seek >= $rowcount)
{
print ("Trying to seek outside result set!");
}
else
{
if (!mssql_data_seek($result, $seek))
{
print ("Seek failed");
}
else
{
print ("Seek complete");
}
}
?>
To have a 'simpler' way of handling errors by supressing the warning:
<?php
if (!@mssql_data_seek($result, $seek))
{
print ("Seek failed");
}
else
{
print ("Seek complete");
}
?>
mssql_data_seek
(PHP 4, PHP 5, PECL odbtp >= 1.1.1)
mssql_data_seek — Moves internal row pointer
Description
bool mssql_data_seek
( resource $result_identifier
, int $row_number
)
mssql_data_seek() moves the internal row pointer of the MS SQL result associated with the specified result identifier to point to the specified row number, first row being number 0. The next call to mssql_fetch_row() would return that row.
Parameters
- result_identifier
-
The result resource that is being evaluated.
- row_number
-
The desired row number of the new result pointer.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 mssql_data_seek() example
<?php
// Connect to MSSQL
$link = mssql_connect('MANGO\SQLEXPRESS', 'sa', 'phpfi');
mssql_select_db('php', $link);
// Select all people
$result = mssql_query('SELECT [name], [age] FROM [persons] WHERE [age] >= 13');
if(!$result)
{
die('Query failed.');
}
// Select every 4th student in the results
for($i = mssql_num_rows($result) - 1; $i % 4; $i++)
{
if(!mssql_data_seek($result, $i))
{
continue;
}
// Fetch the row ...
}
// Free the query result
mssql_free_result($result);
?>
add a note
User Contributed Notesmssql_data_seek
phpcomments at hltools dot com
20-Jul-2005 06:33
20-Jul-2005 06:33