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
Description
bool mssql_data_seek ( resource result_identifier, int row_number )如果成功则返回 TRUE，失败则返回 FALSE。
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.
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User Contributed Notes
phpcomments at hltools dot com
20-Jul-2005 07:33
20-Jul-2005 07:33