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fbsql_read_blob Podręcznik PHP Poprzedni Następny (PHP 4 >= 4.2.0, 5) fbsql_read_blob -- Read a BLOB from the database Opis string ( blob_handle [, resource link_identifier] ) ...
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fbsql_read_blob

fbsql_read_blob

(PHP 4 >= 4.2.0, PHP 5)

fbsql_read_blob -- Read a BLOB from the database

Opis

string fbsql_read_blob ( string blob_handle [, resource link_identifier] )

Reads BLOB data from the database.

If a select statement contains BLOB and/or CLOB columns FrontBase will return the data directly when data is fetched. This default behavior can be changed with fbsql_set_lob_mode() so the fetch functions will return handles to BLOB and CLOB data. If a handle is fetched a user must call fbsql_read_blob() to get the actual BLOB data from the database.

Parametry

blob_handle

A BLOB handle, returned by fbsql_create_blob().

link_identifier

Identyfikator połączenia FrontBase zwrócony przez fbsql_connect() lub fbsql_pconnect().

Jeśli link jest opcjonalny i nie zostanie podany, funkcja spróbuje znaleźć otwarte połączenie do serwera FrontBase i jeśli takiego połączenia nie znajdzie, spróbuje utworzyć je tak jak fbsql_connect() byłaby wywołana bez argumentów

Zwracane wartości

Returns a string containing the specified BLOB data.

Przykłady

Przykład 1. fbsql_read_blob() example

<?php
$link
= fbsql_pconnect("localhost", "_SYSTEM", "secret")
    or die(
"Could not connect");
$sql = "SELECT BLOB_COLUMN FROM BLOB_TABLE;";
$rs = fbsql_query($sql, $link);
$row_data = fbsql_fetch_row($rs);
// $row_data[0] will now contain the blob data for the first row
fbsql_free_result($rs);

$rs = fbsql_query($sql, $link);
fbsql_set_lob_mode($rs, FBSQL_LOB_HANDLE);
$row_data = fbsql_fetch_row($rs);
// $row_data[0] will now contain a handle to the BLOB data in the first row
$blob_data = fbsql_read_blob($row_data[0]);
fbsql_free_result($rs);

?>