oci-num-fields.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.oci-num-fields" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>oci_num_fields</refname>
  <refpurpose>Returns the number of result columns in a statement</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>oci_num_fields</methodname>
   <methodparam><type>resource</type><parameter>statement</parameter></methodparam>
  </methodsynopsis>
  <para>
   Gets the number of columns in the given <parameter>statement</parameter>.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>statement</parameter></term>
     <listitem>
      <para>
       A valid OCI statement identifier.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the number of columns as an <type>int</type>.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>oci_num_fields</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php

// Create the table with:
//   CREATE TABLE mytab (id NUMBER, quantity NUMBER);

$conn = oci_connect("hr", "hrpwd", "localhost/XE");
if (!$conn) {
    $m = oci_error();
    trigger_error(htmlentities($m['message']), E_USER_ERROR);
}

$stid = oci_parse($conn, "SELECT * FROM mytab");
oci_execute($stid, OCI_DESCRIBE_ONLY); // Use OCI_DESCRIBE_ONLY if not fetching rows

$ncols = oci_num_fields($stid);
for ($i = 1; $i <= $ncols; $i++) {
    echo oci_field_name($stid, $i) . " " . oci_field_type($stid, $i) . "<br>\n";
}

// Outputs:
//    ID NUMBER
//    QUANTITY NUMBER

oci_free_statement($stid);
oci_close($conn);

?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
</refentry>
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