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<refentry id="function.mysqli-fetch-field">
 <refnamediv>
  <refname>mysqli_fetch_field</refname>
  <refname>result->fetch_field</refname>
  <refpurpose>Returns the next field in the result set</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <para>Procedural style:</para>
  <methodsynopsis>
   <type>object</type><methodname>mysqli_fetch_field</methodname>
   <methodparam><type>mysqli_result</type><parameter>result</parameter></methodparam>
  </methodsynopsis>
  <para>Object oriented style (method):</para>
  <classsynopsis>
   <ooclass><classname>mysqli_result</classname></ooclass>
   <methodsynopsis>
    <type>object</type><methodname>fetch_field</methodname>
    <void/>
   </methodsynopsis>
  </classsynopsis>
  <para>
   The <function>mysqli_fetch_field</function> returns the definition of one column
   of a result set as an object. Call this function repeatedly to retrieve
   information about all columns in the result set.
   <function>mysqli_fetch_field</function> returns &false; when no more fields
   are left.
  </para>
 </refsect1>
 <refsect1>
  &reftitle.returnvalues;
  <para>
   Returns an object which contains field definition information or &false; if no field information
   is available.
  </para>
  <para>
  <table>
   <title>Object properties</title>
   <tgroup cols='2'>
    <thead>
     <row>
      <entry>Property</entry>
      <entry>Description</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>name</entry>
      <entry>The name of the column</entry>
     </row>
     <row>
      <entry>orgname</entry>
      <entry>Original column name if an alias was specified</entry>
     </row>
     <row>
      <entry>table</entry>
      <entry>The name of the table this field belongs to (if not calculated)</entry>
     </row>
     <row>
      <entry>orgtable</entry>
      <entry>Original table name if an alias was specified</entry>
     </row>
     <row>
      <entry>def</entry>
      <entry>The default value for this field, represented as a string</entry>
     </row>
     <row>
      <entry>max_length</entry>
      <entry>The maximum width of the field for the result set.</entry>
     </row>
     <row>
      <entry>length</entry>
      <entry>The width of the field, as specified in the table definition.</entry>
     </row>
     <row>
      <entry>charsetnr</entry>
      <entry>The character set number for the field.</entry>
     </row>
     <row>
      <entry>flags</entry>
      <entry>An integer representing the bit-flags for the field.</entry>
     </row>
     <row>
      <entry>type</entry>
      <entry>The data type used for this field</entry>
     </row>
     <row>
      <entry>decimals</entry>
      <entry>The number of decimals used (for integer fields)</entry>
     </row>
    </tbody>
   </tgroup>
  </table>
  </para>
 </refsect1>
 <refsect1>
  &reftitle.seealso;
  <para>
   <function>mysqli_num_fields</function>,
   <function>mysqli_fetch_field_direct</function>,
   <function>mysqli_fetch_fields</function>&listendand;
   <function>mysqli_field_seek</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 all columns */
    while ($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 all fields */
    while ($finfo = mysqli_fetch_field($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:     Name
Table:    Country
max. Len: 11
Flags:    1
Type:     254

Name:     SurfaceArea
Table:    Country
max. Len: 10
Flags:    32769
Type:     4

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

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