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>
    <title>Description</title>
     <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>
    <para>
     See also <function>pg_num_fields</function> and
     <function>pg_affected_rows</function>.
    </para>
   </refsect1>
  </refentry>

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