php-doc-en/reference/pgsql/functions/pg-num-rows.xml

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<refentry id="function.pg-num-rows">
 <refnamediv>
  <refname>pg_num_rows</refname> 
  <refpurpose>Returns the number of rows</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>pg_num_rows</methodname>
   <methodparam><type>resource</type><parameter>result</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_num_rows</function> will return the number of rows in
   a PostgreSQL <parameter>result</parameter> resource.
   <parameter>result</parameter> is a query result resource returned
   by <function>pg_query</function>. This function will return -1 on
   error.
  </para>
  <note>
   <para>
    Use <function>pg_affected_rows</function> to get number of rows
    affected by INSERT, UPDATE and DELETE query.
   </para>
  </note>
  <note>
   <para>
    This function used to be called <literal>pg_numrows()</literal>.
   </para>
  </note>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_num_fields</function></member>
    <member><function>pg_affected_rows</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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