File: fbsql-data-seek.xml

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.5 $ -->
<!-- splitted from ./en/functions/fbsql.xml, last change in rev 1.1 -->
  <refentry id="function.fbsql-data-seek">
   <refnamediv>
    <refname>fbsql_data_seek</refname>
    <refpurpose>Move internal result pointer</refpurpose>
   </refnamediv>
   <refsect1>
    &reftitle.description;
     <methodsynopsis>
      <type>bool</type><methodname>fbsql_data_seek</methodname>
      <methodparam><type>resource</type><parameter>result_identifier</parameter></methodparam>
      <methodparam><type>int</type><parameter>row_number</parameter></methodparam>
     </methodsynopsis>
    <para> 
     &return.success;
    </para>
    <para> 
     <function>fbsql_data_seek</function> moves the internal row
     pointer of the FrontBase result associated with the specified
     result identifier to point to the specified row number.  The next
     call to <function>fbsql_fetch_row</function> would return that
     row.
    </para>
    <para>
     <parameter>Row_number</parameter> starts at 0.
    </para>
    <example>
     <title><function>fbsql_data_seek</function> example</title>
     <programlisting role="php">
<![CDATA[
<?php
    $link = fbsql_pconnect("localhost", "_SYSTEM", "secret")
        or die("Could not connect");

    fbsql_select_db("samp_db")
        or die("Could not select database");

    $query = "SELECT last_name, first_name FROM friends;";
    $result = fbsql_query($query)
        or die("Query failed");

    // fetch rows in reverse order

    for ($i = fbsql_num_rows($result) - 1; $i >=0; $i--) {
        if (!fbsql_data_seek($result, $i)) {
            printf("Cannot seek to row %d\n", $i);
            continue;
        }

        if (!($row = fbsql_fetch_object($result)))
            continue;

        echo $row->last_name . $row->first_name . "<br />\n";
    }

    fbsql_free_result($result);
?>
]]>
     </programlisting>
    </example>
   </refsect1>
  </refentry>

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