Php/docs/function.mysql-data-seek
mysql_data_seek
(PHP 4, PHP 5)
mysql_data_seek — Move internal result pointer
Warning This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:
- mysqli_data_seek()
PDO::FETCH_ORI_ABS
Description
mysql_data_seek
( resource $result
, int $row_number
) : bool
mysql_data_seek() moves the internal row pointer of the MySQL result associated with the specified result identifier to point to the specified row number. The next call to a MySQL fetch function, such as mysql_fetch_assoc(), would return that row.
row_number starts at 0. The
row_number should be a value in the range from 0 to
mysql_num_rows() - 1. However if the result set
is empty (mysql_num_rows() == 0), a seek to 0 will
fail with an E_WARNING and
mysql_data_seek() will return FALSE.
Parameters
result- The result resource that is being evaluated. This result comes from a call to mysql_query().
row_number- The desired row number of the new result pointer.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 mysql_data_seek() example
<?php$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);?>
Notes
Note:
The function mysql_data_seek() can be used in conjunction only with mysql_query(), not with mysql_unbuffered_query().
See Also
- mysql_query() - Send a MySQL query
- mysql_num_rows() - Get number of rows in result
- mysql_fetch_row() - Get a result row as an enumerated array
- mysql_fetch_assoc() - Fetch a result row as an associative array
- mysql_fetch_array() - Fetch a result row as an associative array, a numeric array, or both
- mysql_fetch_object() - Fetch a result row as an object
