pg_lo_tell
(PHP 4 >= 4.2.0, PHP 5)
pg_lo_tell — Returns current seek position a of large object
LeÃrás
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.
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
Example#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");
?>
A fenti példa a következő kimenetet adja:
Seek position is: 50000