pg_result_seek
(PHP 4 >= 4.3.0, PHP 5)
pg_result_seek — Set internal row offset in result resource
Описание
bool pg_result_seek
( resource $result
, int $offset
)
pg_result_seek() sets the internal row offset in a result resource.
Список параметров
- result
-
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
- offset
-
Row to move the internal offset to in the result resource. Rows are numbered starting from zero.
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
Примеры
Пример #1 pg_result_seek() example
<?php
// Connect to the database
$conn = pg_pconnect("dbname=publisher");
// Execute a query
$result = pg_query($conn, "SELECT author, email FROM authors");
// Seek to the 3rd row (assuming there are 3 rows)
pg_result_seek($result, 2);
// Fetch the 3rd row
$row = pg_fetch_row($result);
?>
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Коментарии
Ah, this is a handy feature for resetting the record index, for example, if you're used pg_fetch_{row,array,assoc} to iterate over the result set, and you want to do it again later on, without reexecuting your query. Something like:
<?php pg_result_seek($result, 0); ?>
will allow you to iterate over the result set all over again...