fbsql_read_blob
(PHP 4 >= 4.2.0, PHP 5)
fbsql_read_blob -- Read a BLOB from the database
Description
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.
Parameters
blob_handle
A BLOB handle, returned by fbsql_create_blob().
link_identifierA FrontBase link identifier
returned by fbsql_connect() or
fbsql_pconnect().
If optional and not specified,
the function will try to find an open link to the FrontBase server and if no
such link is found it will try to create one as if
fbsql_connect() was called with no arguments
Return Values
Returns a string containing the specified BLOB data.
Examples
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);
?>
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