php-doc-en/reference/sqlsrv/functions/sqlsrv-num-fields.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.sqlsrv-num-fields" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>sqlsrv_num_fields</refname>
  <refpurpose>Retrieves the number of fields (columns) on a statement</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>sqlsrv_num_fields</methodname>
   <methodparam><type>resource</type><parameter>stmt</parameter></methodparam>
  </methodsynopsis>
  <para>
   Retrieves the number of fields (columns) on a statement.
  </para>
 </refsect1>
 
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>stmt</parameter></term>
     <listitem>
      <para>
       The statment for which the number of fields is returned. 
       <function>sqlsrv_num_fields</function> can be called on a statement before 
       or after statement execution.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the number of fields on success. Returns &false; otherwise.
  </para>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>sqlsrv_num_fields</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$serverName = "serverName\sqlexpress";
$connectionInfo = array( "Database"=>"dbName", "UID"=>"username", "PWD"=>"password");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn === false ) {
   die( print_r( sqlsrv_errors(), true));
}

$sql = "SELECT * FROM Table_1";
$stmt = sqlsrv_query($conn, $sql);
if( $stmt === false) {
   die( print_r( sqlsrv_errors(), true));
}

$numFields = sqlsrv_num_fields( $stmt );

while( sqlsrv_fetch( $stmt )) {
   // Iterate through the fields of each row.
   for($i = 0; $i < $numFields; $i++) { 
   {
      echo sqlsrv_get_field($stmt, $i)." ";
     }
     echo "<br />";
}
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>sqlsrv_field_metadata</function></member>
    <member><function>sqlsrv_fetch</function></member>
    <member><function>sqlsrv_get_field</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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