pg_lo_tell
(PHP 4 >= 4.2.0, PHP 5)
pg_lo_tell --
Returns current seek position a of large object
Leírás
int
pg_lo_tell ( resource large_object )
pg_lo_tell() returns the current position (offset
from the beginning) of a large object.
To use the large object interface, it is necessary to
enclose it within a transaction block.
Paraméterek
- large_object
PostgreSQL large object (LOB) resource, returned by pg_lo_open().
Visszatérési értékek
The current seek offset (in number of bytes) from the beginning of the large
object. If there is an error, the return value is negative.
Példák
Példa 1. pg_lo_tell() example
<?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); // See how far we've skipped $offset = pg_lo_tell($handle); echo "Seek position is: $offset"; pg_query($database, "commit"); ?>
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