is-scalar.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.is-scalar" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>is_scalar</refname>
  <refpurpose>
   Indique si une variable est un scalaire
  </refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>is_scalar</methodname>
   <methodparam><type>mixed</type><parameter>value</parameter></methodparam>
  </methodsynopsis>
  <para>
   Indique si une <link linkend="language.expressions">expression</link> est
   évaluée en tant que valeur scalaire.
  </para>
  <para>
   Voir <link linkend="language.types.type-system.atomic.scalar">types scalaires</link> pour plus d'informations.
  </para>
  <note>
   <para>
    <function>is_scalar</function> ne considère pas les valeurs des types &resource;
    comme scalaires, étant donné que les ressources sont des types abstraits, 
    basés sur des entiers. Ceci est susceptible de changer.
   </para>
  </note>
  <note>
   <para>
    La fonction <function>is_scalar</function> ne considère pas
    la valeur NULL comme un scalaire.
   </para>
  </note>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>value</parameter></term>
     <listitem>
      <para>
       La variable à évaluer.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Retourne &true; si <parameter>value</parameter> est un scalaire, &false;
   autrement.
  </para>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Exemple avec <function>is_scalar</function></title>
    <programlisting role="php">
<![CDATA[
<?php
function show_var($var) 
{
    if (is_scalar($var)) {
        echo $var;
    } else {
        var_dump($var);
    }
}
$pi = 3.1416;
$proteines = array("hémoglobine", "cytochrome c oxidase", "ferredoxine");

show_var($pi);

show_var($proteines)
?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
3.1416
array(3) {
  [0]=>
  string(11) "hémoglobine"
  [1]=>
  string(20) "cytochrome c oxidase"
  [2]=>
  string(11) "ferredoxine"
}
]]>
    </screen>
   </example>
  </para>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>is_float</function></member>
    <member><function>is_int</function></member>
    <member><function>is_numeric</function></member>
    <member><function>is_real</function></member>
    <member><function>is_string</function></member>
    <member><function>is_bool</function></member>
    <member><function>is_object</function></member>
    <member><function>is_array</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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