(PHP 4 >= 4.2.0, PHP 5, PHP 7)
Returns current seek position a of large object
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().
Returns:
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:
5.6.0
Added PostgreSQL 9.3's 64bit large object support. Both client and server must support PostgreSQL 9.3 and PHP must be 64bit build to use 64bit large object.
Examples:
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:
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