fbsql_read_blob
(PHP 4 >= 4.2.0)
fbsql_read_blob -- Read a BLOB from the database
Description
string fbsql_read_blob ( string blob_handle [, resource
link_identifier])
Returns: A string containing the BLOB specified by blob_handle.
fbsql_read_blob() 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.
Example 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);
?>
See also: fbsql_create_blob(), fbsql_read_blob(), fbsql_read_clob(),
and fbsql_set_lob_mode().
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