php-doc-en/reference/mysqli/functions/mysqli-fetch-lengths.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.10 $ -->
<!-- EN-Revision: 1.9 Maintainer: baoengb Status: ready -->
  <refentry id="function.mysqli-fetch-lengths">
   <refnamediv>
    <refname>mysqli_fetch_lengths</refname>
    <refname>result->lengths</refname>
    <refpurpose>Regresa la longitud de las columnas de la fila actual en el 
	 resultado</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Descripci&oacute;n</title>
    <para>Estilo por procedimientos:</para>
    <methodsynopsis>
     <type>mixto</type><methodname>mysqli_fetch_lengths</methodname>
     <methodparam><type>objeto</type><parameter>resultado</parameter></methodparam>
    </methodsynopsis>
    <para>Estilo orientado a objetos(propiedad):</para>
    <classsynopsis>
     <ooclass><classname>resultado</classname></ooclass>
     <fieldsynopsis><type>mixto</type><varname>lengths</varname></fieldsynopsis>
    </classsynopsis>
    <para>
	  La funci&oacute;n <function>mysqli_fetch_lengths</function> regresa una matriz 
	  conteniendo la longitud de cada columna de la fila actual en el resultado 
	  representado por el par&aacute;metro <parameter>result</parameter>. Si hay 
	  informaci&oacute;n regresa una matriz num&eacute;ricamente ordenada representando 
	  la longitud de cada columna o &false; si falla.
    </para>
   </refsect1>
   <refsect1>
    <title>Valores regresados</title>
    <para>
	  Una matriz de enteros representando el tama<6D>o de cada columna (sin incluir 
	  el caracter NULL al final de la columna). &false; si ocurre un error.
    </para>
    <para>
     <function>mysql_fetch_lengths</function>Es valida solo para la fila actual 
	  en el resultado. Regresa &false; si se llama antes de ejecutar 
	  mysql_fetch_row/array/object o despu&eacute;s de obtener todas las filas 
	  en el resultado.
    </para>
   </refsect1>
   <refsect1>
    <title>Ejemplos</title>
    <example>
     <title>Estilo orientado a objetos</title>
     <programlisting role="php">
<![CDATA[
<?php
$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 * from Country ORDER BY Code LIMIT 1";

if ($result = $mysqli->query($query)) {

    $row = $result->fetch_row();

    /* display column lengths */
    for ($i=0; $i < count($result->lengths); $i++) {
        printf("Field %2d has Length %2d\n", $i+1, $result->lengths[$i]);
    }
    $result->close();
}

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

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

$query = "SELECT * from Country ORDER BY Code LIMIT 1";

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

	$row = mysqli_fetch_row($result);

    /* display column lengths */
    $lengths = mysqli_fetch_lengths($result);
    for ($i=0; $i < count($lengths); $i++) {
        printf("Field %2d has Length %2d\n", $i+1, $lengths[$i]);
    }
    mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>
]]>
     </programlisting>
    </example>
    <para>
	  Los ejemplos anteriores producir&aacute;n la siguiente salida:
    </para>
    <screen>
<![CDATA[
Field  1 has Length  3
Field  2 has Length  5
Field  3 has Length 13
Field  4 has Length  9
Field  5 has Length  6
Field  6 has Length  1
Field  7 has Length  6
Field  8 has Length  4
Field  9 has Length  6
Field 10 has Length  6
Field 11 has Length  5
Field 12 has Length 44
Field 13 has Length  7
Field 14 has Length  3
Field 15 has Length  2
]]>
    </screen>
   </refsect1>
  </refentry>

<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->