PostgreSQL Functions
PHP Manual

pg_lo_tell

Returns current seek position a of large object

Description

int pg_lo_tell(PgSql\Lob $lob)

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

lob

An PgSql\Lob instance, 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.

Changelog

Version Description
8.1.0 The lob parameter expects an PgSql\Lob instance now; previously, a resource was expected.

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