mysql_data_seek

mysql_data_seek

Move internal result pointer

Waarschuwing: > mysqli_data_seek``PDO::FETCH_ORI_ABS

bool **mysql_data_seek** resource $result int $row_number

moves the internal row

pointer of the MySQL result associated with the specified result identifier to point to the specified row number. The next call to a MySQL fetch function, such as , would return that row. mysql_data_seek``mysql_fetch_assoc

starts at 0. The
should be a value in the range from 0 to
- 1. However if the result set

is empty ( == 0), a seek to 0 will fail with an and will return false. row_number``row_number``mysql_num_rows``mysql_num_rows``E_WARNING``mysql_data_seek

row_numberThe desired row number of the new result pointer.

return.success

Voorbeeld: example

<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
    die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db('sample_db');
if (!$db_selected) {
    die('Could not select database: ' . mysql_error());
}
$query = 'SELECT last_name, first_name FROM friends';
$result = mysql_query($query);
if (!$result) {
    die('Query failed: ' . mysql_error());
}
/* fetch rows in reverse order */
for ($i = mysql_num_rows($result) - 1; $i >= 0; $i--) {
    if (!mysql_data_seek($result, $i)) {
        echo "Cannot seek to row $i: " . mysql_error() . "\n";
        continue;
    }

    if (!($row = mysql_fetch_assoc($result))) {
        continue;
    }

    echo $row['last_name'] . ' ' . $row['first_name'] . "<br />\n";
}

mysql_free_result($result);
?>

Opmerking: > The function can be used in conjunction only with , not with . mysql_data_seek``mysql_query``mysql_unbuffered_query

mysql_query``mysql_num_rows``mysql_fetch_row``mysql_fetch_assoc``mysql_fetch_array``mysql_fetch_object