# pg_lo_write

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

pg_lo_write — Write to a large object

### Description

pg_lo_write ( resource `$large_object` , string `$data` [, int `$len` ] ) : int

pg_lo_write() writes data into a large object at the current seek position.

To use the large object interface, it is necessary to enclose it within a transaction block.

> Note:

> This function used to be called pg_lowrite().

### Parameters

`large_object`

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

`data`

  The data to be written to the large object. If `len` is specified and is less than the length of `data`, only `len` bytes will be written.

`len`

  An optional maximum number of bytes to write. Must be greater than zero and no greater than the length of `data`. Defaults to the length of `data`.

### Return Values

The number of bytes written to the large object, or `FALSE` on error.

### Examples

Example #1 pg_lo_write() example

`<?php
$doc_oid = 189762345;
$data = "This will overwrite the start of the large object.";
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$handle = pg_lo_open($database, $doc_oid, "w");
$data = pg_lo_write($handle, $data);
pg_query($database, "commit");
?>`

### See Also

- pg_lo_create() - Create a large object
- pg_lo_open() - Open a large object