php 한글 메뉴얼 도움말 검색 사이트 Returns current seek position a of large object [function.pg-lo-tell]

설명

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.

인수

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

반환값

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.

예제

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");
?>

위 예제의 출력:

Seek position is: 50000

변경점

버전	설명
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.

참고

pg_lo_seek() - Seeks position within a large object