File: mysqli-field-seek.xml

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.8 $ -->
  <refentry id="function.mysqli-field-seek">
   <refnamediv>
    <refname>mysqli_field_seek</refname>
    <refname>result->field_seek</refname>
    <refpurpose>
     Set result pointer to a specified field offset
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <para>Procedural style:</para>
     <methodsynopsis>
      <type>bool</type><methodname>mysqli_field_seek</methodname>
      <methodparam><type>mysqli_result</type><parameter>result</parameter></methodparam>
      <methodparam><type>int</type><parameter>fieldnr</parameter></methodparam>
     </methodsynopsis>
     <para>Object oriented style (method):</para>
     <classsynopsis>
      <ooclass><classname>mysqli_result</classname></ooclass>
      <methodsynopsis>
       <type>bool</type><methodname>field_seek</methodname>
       <methodparam><type>int</type><parameter>fieldnr</parameter></methodparam>
      </methodsynopsis>
     </classsynopsis>  
    <para>
     Sets the field cursor to the given offset. The next call to <function>mysqli_fetch_field</function>
     will retrieve the field definition of the column associated with that offset.
    </para>
    <note>
     <para>To seek to the beginning of a row, pass an offset value of zero.</para>
    </note>
   </refsect1>
   <refsect1>
    &reftitle.returnvalues;
    <para>
     <function>mysqli_field_seek</function> returns previuos value of field cursor.
    </para>
   </refsect1>
   <refsect1>
    &reftitle.seealso;
    <para>
     <function>mysqli_fetch_field</function>.
    </para>
   </refsect1>
   <refsect1>
    &reftitle.examples;
    <example>
     <title>Object oriented style</title>
     <programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";

if ($result = $mysqli->query($query)) {

    /* Get field information for 2nd column */
    $result->field_seek(1);
    $finfo = $result->fetch_field();
 
    printf("Name:     %s\n", $finfo->name);
    printf("Table:    %s\n", $finfo->table);
    printf("max. Len: %d\n", $finfo->max_length);
    printf("Flags:    %d\n", $finfo->flags);
    printf("Type:     %d\n\n", $finfo->type);
    
    $result->close();
}

/* close connection */
$mysqli->close();
?>
]]>
    </programlisting>
    </example>
    <example>
     <title>Procedural style</title>
     <programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";

if ($result = mysqli_query($link, $query)) {

    /* Get field information for 2nd column */
    mysqli_field_seek($result, 1);
    $finfo = mysqli_fetch_field($result);
 
    printf("Name:     %s\n", $finfo->name);
    printf("Table:    %s\n", $finfo->table);
    printf("max. Len: %d\n", $finfo->max_length);
    printf("Flags:    %d\n", $finfo->flags);
    printf("Type:     %d\n\n", $finfo->type);

    mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>
]]>
     </programlisting>
    </example>
    &example.outputs;
    <screen>
<![CDATA[
Name:     SurfaceArea
Table:    Country
max. Len: 10
Flags:    32769
Type:     4

]]>
    </screen>
   </refsect1>
  </refentry>

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