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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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