<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
$TOC = array();
$TOC_DEPRECATED = array();
$PARENTS = array();
include_once dirname(__FILE__) ."/toc/ref.mysql.inc";
$setup = array (
  'home' => 
  array (
    0 => 'index.php',
    1 => 'PHP Manual',
  ),
  'head' => 
  array (
    0 => 'UTF-8',
    1 => 'it',
  ),
  'this' => 
  array (
    0 => 'function.mysql-field-len.php',
    1 => 'mysql_field_len',
    2 => 'Returns the length of the specified field',
  ),
  'up' => 
  array (
    0 => 'ref.mysql.php',
    1 => 'MySQL Funzioni',
  ),
  'prev' => 
  array (
    0 => 'function.mysql-field-flags.php',
    1 => 'mysql_field_flags',
  ),
  'next' => 
  array (
    0 => 'function.mysql-field-name.php',
    1 => 'mysql_field_name',
  ),
  'alternatives' => 
  array (
  ),
  'source' => 
  array (
    'lang' => 'en',
    'path' => 'reference/mysql/functions/mysql-field-len.xml',
  ),
  'history' => 
  array (
  ),
);
$setup["toc"] = $TOC;
$setup["toc_deprecated"] = $TOC_DEPRECATED;
$setup["parents"] = $PARENTS;
manual_setup($setup);

contributors($setup);

?>
<div id="function.mysql-field-len" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">mysql_field_len</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_field_len</span> &mdash; <span class="dc-title">Returns the length of the specified field</span></p>

 </div>

 <div id="function.mysql-field-len-refsynopsisdiv">
  <div class="warning"><strong class="warning">Avviso</strong>
   <p class="para">Questa enstensione  deprecata da PHP 5.5.0, e sarà rimossa in futuro.
Al suo posto, usare l&#039;estensione <a href="book.mysqli.php" class="link">MySQLi</a> o <a href="ref.pdo-mysql.php" class="link">PDO_MySQL</a>.
Vedere anche la guida <a href="mysqlinfo.api.choosing.php" class="link">MySQL: scelta dell&#039;API</a> e
le <a href="faq.databases.php#faq.databases.mysql.deprecated" class="link">FAQ relative</a> per ulteriori informazioni. 
Le alternative a questa funzione includono:</p>
   <ul class="simplelist">
    <li><span class="function"><a href="mysqli-result.fetch-field-direct.php" class="function">mysqli_fetch_field_direct()</a></span> [length]</li>
    <li><span class="methodname"><a href="pdostatement.getcolumnmeta.php" class="methodname">PDOStatement::getColumnMeta()</a></span> [len]</li>
   </ul>
  </div>
 </div>

 <div class="refsect1 description" id="refsect1-function.mysql-field-len-description">
  <h3 class="title">Descrizione</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>mysql_field_len</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span> <code class="parameter">$result</code></span>, <span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$field_offset</code></span>): <span class="type"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span>|<span class="type"><a href="language.types.singleton.php" class="type false">false</a></span></span></div>

  <p class="simpara">
   <span class="function"><strong>mysql_field_len()</strong></span> returns the length of the
   specified field.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.mysql-field-len-parameters">
  <h3 class="title">Elenco dei parametri</h3>
  <dl>
   <dt><code class="parameter">
result</code></dt><dd><p class="para">The risultato <span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span> che
che viene calcolato. Questo risultato deriva dal una chiamata a
<span class="function"><a href="function.mysql-query.php" class="function">mysql_query()</a></span>.</p></dd>
   <dt><code class="parameter">
field_offset</code></dt><dd><p class="para">L&#039;offset numerico dei campi.
<code class="parameter">field_offset</code> inizia da <code class="literal">0</code>. Se
<code class="parameter">field_offset</code> non esiste, viene generato un errore di livello
<strong><code><a href="errorfunc.constants.php#constant.e-warning">E_WARNING</a></code></strong>.</p></dd>
  </dl>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.mysql-field-len-returnvalues">
  <h3 class="title">Valori restituiti</h3>
  <p class="simpara">
   The length of the specified field index on success o <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> in caso di fallimento.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.mysql-field-len-examples">
  <h3 class="title">Esempi</h3>
  <div class="example" id="example-1">
   <p><strong>Example #1 <span class="function"><strong>mysql_field_len()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />$result </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT id,email FROM people WHERE id = '42'"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br />    echo </span><span style="color: #DD0000">'Could not run query: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">();<br />    exit;<br />}<br /><br /></span><span style="color: #FF8000">// Will get the length of the id field as specified in the database<br />// schema.<br /></span><span style="color: #0000BB">$length </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_field_len</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$length</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
   </div>

  </div>
 </div>


 <div class="refsect1 notes" id="refsect1-function.mysql-field-len-notes">
  <h3 class="title">Note</h3>
  <blockquote class="note"><p><strong class="note">Nota</strong>: 
   <span class="simpara">
    Per la compatibilità all&#039;indietro, i seguenti
sinonimi (deprecati) possono essere utilizzati: 
    <span class="function"><strong>mysql_fieldlen()</strong></span>
   </span>
  </p></blockquote>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.mysql-field-len-seealso">
  <h3 class="title">Vedere anche:</h3>
  <ul class="simplelist">
   <li><span class="function"><a href="function.mysql-fetch-lengths.php" class="function" rel="rdfs-seeAlso">mysql_fetch_lengths()</a> - Get the length of each output in a result</span></li>
   <li><span class="function"><a href="function.strlen.php" class="function" rel="rdfs-seeAlso">strlen()</a> - Restituisce la lunghezza di una stringa</span></li>
  </ul>
 </div>

</div><?php manual_footer($setup); ?>