pg_lo_tell

pg_lo_tell

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_tell --  Returns current seek position a of large object

Description

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 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");
?>

The above example will output:

Seek position is: 50000

See Also

pg_lo_seek()

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