pg_lo_tell
(PHP 4 >= 4.2.0, PHP 5)
pg_lo_tell --
Returns current seek position a of large object
Beskrivelse
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.
Parameterliste
large_object
PostgreSQL large object (LOB) resource, returned by pg_lo_open().
Returneringsværdier
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.
Eksempler
Eksempel 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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