<?xml version="1.0" encoding="iso-8859-1"?>
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  <refentry id="function.fbsql-read-blob">
   <refnamediv>
    <refname>fbsql_read_blob</refname>
    <refpurpose>Read a BLOB from the database</refpurpose>
   </refnamediv>
   <refsect1>
    &reftitle.description;
     <methodsynopsis>
      <type>string</type><methodname>fbsql_read_blob</methodname>
      <methodparam><type>string</type><parameter>blob_handle</parameter></methodparam>
      <methodparam choice="opt"><type>resource</type><parameter>
        link_identifier
       </parameter></methodparam>
     </methodsynopsis>
    <para> 
     Returns: A string containing the BLOB specified by blob_handle.
    </para>
    <para> 
     <function>fbsql_read_blob</function> 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
     <function>fbsql_set_lob_mode</function> so the fetch functions
     will return handles to BLOB and CLOB data.  If a handle is
     fetched a user must call <function>fbsql_read_blob</function> to
     get the actual BLOB data from the database.
    </para>
    <example>
     <title><function>fbsql_read_blob</function> example</title>
     <programlisting role="php">
<![CDATA[
<?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);
    
?>
]]>
     </programlisting>
    </example>
    <para>
     See also: <function>fbsql_create_blob</function>,
     <function>fbsql_read_clob</function>, and
     <function>fbsql_set_lob_mode</function>.
    </para>
   </refsect1>
  </refentry>

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