pg_lo_read_all

pg_lo_seek

PostgreSQL

PHP Manual

pg_lo_read

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_read — Read a large object

Описание

string pg_lo_read ( resource $large_object [, int $len ] )

pg_lo_read() reads at most len bytes from a large object and returns it as a string.

To use the large object interface, it is necessary to enclose it within a transaction block.

Замечание: This function used to be called pg_loread().

Список параметров

large_object

PostgreSQL large object (LOB) resource, returned by pg_lo_open().

len

An optional maximum number of bytes to return. Defaults to 8192.

Возвращаемые значения

A string containing len bytes from the large object, or FALSE on error.

Примеры

Пример #1 pg_lo_read() example

<?php
   $doc_oid = 189762345;
   $database = pg_connect("dbname=jacarta");
   pg_query($database, "begin");
   $handle = pg_lo_open($database, $doc_oid, "r");
   $data = pg_lo_read($handle, 50000);
   pg_query($database, "commit");
   echo $data;
?>

Смотрите также

• pg_lo_read_all()

pg_lo_read_all

pg_lo_seek

PostgreSQL

PHP Manual