PHP 5.4.33 Released

pg_lo_read

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_readRead a large object

Açıklama

string pg_lo_read ( resource $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.

Bilginize:

This function used to be called pg_loread().

Değiştirgeler

large_object

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

len

An optional maximum number of bytes to return.

Dönen Değerler

A string containing len bytes from the large object, or FALSE on error.

Örnekler

Örnek 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");
   
$data pg_lo_read($handle50000);
   
pg_query($database"commit");
   echo 
$data;
?>

Ayrıca Bakınız

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User Contributed Notes 1 note

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bobahspb at gmail dot com
3 years ago
Be careful: pg_lo_export() create empty file without "begin"/"end".
See docs: "...it is necessary to enclose it within a transaction block..."
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