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pg_lo_seek

PHP function Edit on GitHub ✎

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

Seeks position within a large object

Description

pg_lo_seek(PgSql\Lob $lob, int $offset, int $whence = SEEK_CUR): bool

pg_lo_seek() seeks a position within an PgSql\Lob instance.

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

Parameters

lob: Lob
offset: The number of bytes to seek.
whence: One of the constants PGSQL_SEEK_SET (seek from object start), PGSQL_SEEK_CUR (seek from current position) or PGSQL_SEEK_END (seek from object end) .

Return Values

Success

Changelog

Version	Description

Examples

pg_lo_seek() example

php

<?php
   $doc_oid = 189762345;
   $database = pg_connect("dbname=jacarta");
   pg_query($database, "begin");
   $handle = pg_lo_open($database, $doc_oid, "r");
   // Skip first 50000 bytes
   pg_lo_seek($handle, 50000, PGSQL_SEEK_SET);
   // Read the next 10000 bytes
   $data = pg_lo_read($handle, 10000);
   pg_query($database, "commit");
   echo $data;
?>