pg_lo_write

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_lo_write — Write to a large object

Description

pg_lo_write(PgSql\Lob $lob, string $data, ?int $length = null): int|false

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

lob

An PgSql\Lob instance, returned by pg_lo_open().

data

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

length

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.

Changelog

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

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