JavaScript Editor Javascript debugger     Website design 

pg_lo_tell

Returns current seek position a of large object (PHP 4 >= 4.2.0, PHP 5)
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.

Parameters

large_object

PostgreSQL large object (LOB) resource, returned by pg_lo_open().

Return Values

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.

Examples

Example 1951. 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");
?>

The above example will output:

Seek position is: 50000


See Also
pg_lo_seek()