Manuál PHP
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pg_lo_read

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_read -- Read a large object

Popis

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.

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

Seznam parametrů

large_object: PostgreSQL large object (LOB) resource, returned by pg_lo_open().
len: An optional maximum number of bytes to return. Defaults to 8192.

Návratové hodnoty

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

Příklady

Příklad 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;
?>

Viz také

pg_lo_read_all()

Předcházející	Domů	Další
pg_lo_read_all	Nahoru	pg_lo_seek