php-doc-en/reference/oci8/functions/oci-field-is-null.xml

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<refentry xml:id="function.oci-field-is-null" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>oci_field_is_null</refname>
  <refpurpose>Checks if the field is &null;</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>oci_field_is_null</methodname>
   <methodparam><type>resource</type><parameter>statement</parameter></methodparam>
   <methodparam><type>mixed</type><parameter>field</parameter></methodparam>
  </methodsynopsis>
  <para>
   Checks if the given <parameter>field</parameter> from the 
   <parameter>statement</parameter> is &null;. 
  </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>
    <varlistentry>
     <term><parameter>field</parameter></term>
     <listitem>
      <para>
       Can be a field's index or a field's name (uppercased).
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns &true; if <parameter>field</parameter> is &null;, &false; otherwise. 
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  <note>
   <para>
    In PHP versions before 5.0.0 you must use <function>ocicolumnisnull</function> instead.
    This name still can be used, it was left as alias of
    <function>oci_field_is_null</function> for downwards compatability.
    This, however, is deprecated and not recommended.
   </para>
  </note>
 </refsect1>

</refentry>

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