(PHP 4 >= 4.2.0, PHP 5)
pg_lo_read — Read a large object
$large_object
   [, int $len = 8192
  ] )
   pg_lo_read() reads at most
   len bytes from a large object and
   returns it as a string.
  
To use the large object interface, it is necessary to enclose it within a transaction block.
Note:
This function used to be called pg_loread().
large_objectPostgreSQL large object (LOB) resource, returned by pg_lo_open().
lenAn optional maximum number of bytes to return.
   A string containing len bytes from the
   large object, or FALSE on error.
  
Example #1 pg_lo_read() example
<?php
   $doc_oid = 189762345;
   $database = pg_connect("dbname=jacarta");
   pg_query($database, "begin");
   $handle = pg_lo_open($database, $doc_oid, "r");
   $data = pg_lo_read($handle, 50000);
   pg_query($database, "commit");
   echo $data;
?>