archived-doc-it/reference/errorfunc/functions/error-reporting.xml

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<!-- splitted from ./it/functions/errorfunc.xml, last change in rev 1.1 -->
<!-- last change to 'error-reporting' in en/ tree in rev 1.1 -->
<!-- EN-Revision: 1.2 Maintainer: pulici Status: ready -->
<!-- OLD-Revision: 1.27/EN.1.1 -->
  <refentry id="function.error-reporting">
   <refnamediv>
    <refname>error_reporting</refname>
    <refpurpose>definisce quali errori di PHP vengono restituiti</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>error_reporting</methodname>
      <methodparam choice="opt"><type>int</type><parameter>livello</parameter></methodparam>
     </methodsynopsis>
    <para>
     Definisce il livello di restituzione di errore di PHP e ritorna il vecchio
     livello. Il livello di restituzione dell'errore può essere una maschera di
     bit o una costante named. L'utilizzo delle costanti named è caldamente 
     consigliato per assicurare la compatibilità con versioni future.
     All'aggiungere di livelli di errore, la gamma degli interi viene incrementata,
     perciò vecchi livelli di errore basati sull'intero non si comporteranno
     sempre come ci si aspetta.
     <example role="php">
      <title>Error Integer changes</title>
      <programlisting role="php">
<![CDATA[
error_reporting (55);   // Equivalente a E_ALL ^ E_NOTICE in PHP 3

/* ...in PHP 4, '55' indica (E_ERROR | E_WARNING | E_PARSE |
E_CORE_ERROR | E_CORE_WARNING) */

error_reporting (2039); // Equivalente a E_ALL ^ E_NOTICE in PHP 4

error_reporting (E_ALL ^ E_NOTICE); // Il medesimo in PHP 3 e 4
]]>
      </programlisting>
     </example>
     Seguite i collegamenti delle costanti per conoscerne il significato:
     <table>
      <title><function>error_reporting</function> valori dei bit</title>
      <tgroup cols="2">
       <thead>
        <row>
         <entry>valore</entry>
         <entry>costante</entry>
        </row>
       </thead>
       <tbody>
        <row>
         <entry>1</entry>
         <entry>
          <link linkend="internal.e-error">E_ERROR</link>
         </entry>
        </row>
        <row>
         <entry>2</entry>
         <entry>
          <link linkend="internal.e-warning">E_WARNING</link>
         </entry>
        </row>
        <row>
         <entry>4</entry>
         <entry>
          <link linkend="internal.e-parse">E_PARSE</link>
         </entry>
        </row>
        <row>
         <entry>8</entry>
         <entry>
          <link linkend="internal.e-notice">E_NOTICE</link>
         </entry>
        </row>
        <row>
         <entry>16</entry>
         <entry>
          <link linkend="internal.e-core-error">E_CORE_ERROR</link>
         </entry>
        </row>
        <row>
         <entry>32</entry>
         <entry>
          <link linkend="internal.e-core-warning">E_CORE_WARNING</link>
         </entry>
        </row>
        <row>
         <entry>64</entry>
         <entry>
          <link linkend="internal.e-compile-error">E_COMPILE_ERROR</link>
         </entry>
        </row>
        <row>
         <entry>128</entry>
         <entry>
          <link linkend="internal.e-compile-warning">E_COMPILE_WARNING</link>
         </entry>
        </row>
        <row>
         <entry>256</entry>
         <entry>
          <link linkend="internal.e-user-error">E_USER_ERROR</link>
         </entry>
        </row>
        <row>
         <entry>512</entry>
         <entry>
          <link linkend="internal.e-user-warning">E_USER_WARNING</link>
         </entry>
        </row>
        <row>
         <entry>1024</entry>
         <entry>
          <link linkend="internal.e-user-error">E_USER_NOTICE</link>
         </entry>
        </row>
        <row>
         <entry>2047</entry>
         <entry>
          <link linkend="internal.e-all">E_ALL</link>
         </entry>
        </row>
       </tbody>
      </tgroup>
     </table>
    </para>
    <para>
     <example role="php">
      <title>esempi <function>error_reporting</function></title>
      <programlisting role="php">
<![CDATA[
// Turn off all error reporting
error_reporting (0);

// Report simple running errors
error_reporting  (E_ERROR | E_WARNING | E_PARSE);

// Reporting E_NOTICE can be good too (to report uninitialized 
// variables or catch variable name misspellings)
error_reporting (E_ERROR | E_WARNING | E_PARSE | E_NOTICE);

// Report all PHP errors (use bitwise  63  in PHP 3)
error_reporting (E_ALL);
]]>
      </programlisting>
     </example>
    </para>
   </refsect1>
  </refentry>

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