php-doc-en/reference/mysqli/functions/mysqli-data-seek.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.13 $ -->
<!-- EN-Revision: 1.12 Maintainer: baoengb Status: ready -->
  <refentry id="function.mysqli-data-seek">
   <refnamediv>
    <refname>mysqli_data_seek</refname>
    <refname>result->data_seek</refname>
    <refpurpose>Ajusta el apuntador arbitrariamente a una fila en el resultado</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Descripci&oacute;n</title>
    <para>Estilo por procedimientos:</para>
    <methodsynopsis>
     <type>bool</type><methodname>mysqli_data_seek</methodname>
     <methodparam><type>objeto</type><parameter>resultado</parameter></methodparam>
     <methodparam><type>int</type><parameter>posici&oacute;n</parameter></methodparam>
    </methodsynopsis>
    <para>Estilo orientado a objetos (m&eacute;todo):</para>
    <classsynopsis>
     <ooclass><classname>resultado</classname></ooclass>
     <methodsynopsis>
      <type>bool</type>
      <methodname>data_seek</methodname>
      <methodparam><type>int</type><parameter>posici&oacute;n</parameter></methodparam>
     </methodsynopsis>
    </classsynopsis>
    <para>
	  La funci&oacute;n <function>mysqli_data_seek</function> busca arbitrariamente 
	  apuntar al valor espec&iacute;ficado por <parameter>posici&oacute;n</parameter> 
	  en el conjunto resultante representado por <parameter>result</parameter>.  
	  Los valores del par&aacute;metro <parameter>posici&oacute;n</parameter> 
	  deben estar entre cero y el total de filas menus uno (0 .. <function>mysqli_num_rows</function> - 1).
    </para>
    <note>
     <para>
	   Est&aacute; funci&oacute;n solo puede ser usada con resultados sin almacenamiento 
		intermedio logrados por el uso de las funciones 
      <function>mysqli_store_result</function> o <function>mysqli_query</function>. 
     </para>
    </note>
   </refsect1>
   <refsect1>
    <title>Valores regresados</title>
    <para>
     &return.success;
    </para>
   </refsect1>
   <refsect1>
    <title>Vea tambi&eacute;n</title>
    <para>
     <function>mysqli_store_result</function>,
     <function>mysqli_fetch_row</function>,
     <function>mysqli_num_rows</function>.
    </para>
   </refsect1>
   <refsect1>
    <title>Ejemplos</title>
    <example>
     <title>Estilo orientado a onjetos</title>
     <programlisting role="php">
<![CDATA[
<?php
/* Open a connection */
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */ 
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
if ($result = $mysqli->query( $query)) {

    /* seek to row no. 400 */
    $result->data_seek(399);

    /* fetch row */
    $row = $result->fetch_row();

    printf ("City: %s  Countrycode: %s\n", $row[0], $row[1]);
        
    /* free result set*/
    $result->close();
}

/* close connection */
$mysqli->close();
?>
]]>
    </programlisting>
    </example>
    <example>
     <title>Estilo por procedimientos</title>
     <programlisting role="php">
<![CDATA[
<?php
/* Open a connection */
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */ 
if (!$link) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, CountryCode FROM City ORDER BY Name";

if ($result = mysqli_query($link, $query)) {

    /* seek to row no. 400 */
    mysqli_data_seek($result, 399);

    /* fetch row */
    $row = mysqli_fetch_row($result);

    printf ("City: %s  Countrycode: %s\n", $row[0], $row[1]);
        
    /* free result set*/
    mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>
]]>
     </programlisting>
    </example>
    <para>
	  Los ejemplos anteriores producir&aacute;n la siguiente salida: 
    </para>
    <screen>
<![CDATA[
City: Benin City  Countrycode: NGA
]]>
    </screen>
   </refsect1>
  </refentry>

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