pg_lo_read

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_lo_read — Read a large object

Description

pg_lo_read(PgSql\Lob $lob, int $length = 8192): string|false

pg_lo_read() reads at most length 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.

Note:

This function used to be called pg_loread().

Parameters

lob

An PgSql\Lob instance, returned by pg_lo_open().

length

An optional maximum number of bytes to return.

Return Values

A string containing length bytes from the large object, or false on error.

Changelog

Version Description
8.1.0 The lob parameter expects an PgSql\Lob instance now; previously, a resource was expected.

Examples

Example #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;
?>

See Also