Source of: /manual/fr/function.preg-filter.php
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<div id="function.preg-filter" class="refentry">
<div class="refnamediv">
<h1 class="refname">preg_filter</h1>
<p class="verinfo">(PHP 5 >= 5.3.0)</p><p class="refpurpose"><span class="refname">preg_filter</span> — <span class="dc-title">Recherche et remplace avec une expression rationnelle</span></p>
</div>
<a name="function.preg-filter.description"></a><div class="refsect1 description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type"><a href="language.pseudo-types.php#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><b>preg_filter</b></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.php#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$pattern</tt></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.php#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$replacement</tt></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.php#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$subject</tt></span>
[, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$limit</tt><span class="initializer">= -1</span></span>
[, <span class="methodparam"><span class="type">int</span> <tt class="parameter reference">&$count</tt></span>
]] )</div>
<p class="para rdfs-comment">
<b>preg_filter()</b> est identique à
<a href="function.preg-replace.php" class="function">preg_replace()</a>, mais elle ne fait que retourner
les occurrences trouvées. Pour plus de détails sur le fonctionnement
de cette fonction, voyez <a href="function.preg-replace.php" class="function">preg_replace()</a>.
</p>
</div>
<a name="function.preg-filter.parameters"></a><div class="refsect1 parameters">
<h3 class="title">Liste de paramètres</h3>
<p class="para">
</p><dl>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">pattern</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">replacement</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">subject</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">limit</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">count</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
</p>
</dd>
</dl>
<p>
</p>
</div>
<a name="function.preg-filter.returnvalues"></a><div class="refsect1 returnvalues">
<h3 class="title">Valeurs de retour</h3>
<p class="para">
Retourne un <a href="language.types.array.php" class="link">tableau</a> si le paramètre <i><tt class="parameter">subject</tt></i>
est de type <a href="language.types.array.php" class="link">tableau</a> ou une <a href="language.types.string.php" class="link">chaîne de caractères</a> autrement.
</p>
<p class="para">
Si des occurrences sont trouvées, le nouveau
<i><tt class="parameter">subject</tt></i>
sera retourné, et sinon,
<i><tt class="parameter">subject</tt></i>
sera retourné inchangé, ou
<b><tt class="constant">NULL</tt></b> si une erreur est survenue.
</p>
</div>
<a name="function.preg-filter.examples"></a><div class="refsect1 examples">
<h3 class="title">Exemples</h3>
<p class="para">
</p><div class="example">
<p><b>Exemple #1
Exemple de comparaison de <b>preg_filter()</b>
avec <a href="function.preg-replace.php" class="function">preg_replace()</a>
</b></p>
<div class="example-contents programlisting">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$subject </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'1'</span><span style="color: #007700">, </span><span style="color: #DD0000">'a'</span><span style="color: #007700">, </span><span style="color: #DD0000">'2'</span><span style="color: #007700">, </span><span style="color: #DD0000">'b'</span><span style="color: #007700">, </span><span style="color: #DD0000">'3'</span><span style="color: #007700">, </span><span style="color: #DD0000">'A'</span><span style="color: #007700">, </span><span style="color: #DD0000">'B'</span><span style="color: #007700">, </span><span style="color: #DD0000">'4'</span><span style="color: #007700">); <br /></span><span style="color: #0000BB">$pattern </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'/\d/'</span><span style="color: #007700">, </span><span style="color: #DD0000">'/[a-z]/'</span><span style="color: #007700">, </span><span style="color: #DD0000">'/[1a]/'</span><span style="color: #007700">); <br /></span><span style="color: #0000BB">$replace </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'A:$0'</span><span style="color: #007700">, </span><span style="color: #DD0000">'B:$0'</span><span style="color: #007700">, </span><span style="color: #DD0000">'C:$0'</span><span style="color: #007700">); <br /><br />echo </span><span style="color: #DD0000">"preg_filter renvoie\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">preg_filter</span><span style="color: #007700">(</span><span style="color: #0000BB">$pattern</span><span style="color: #007700">, </span><span style="color: #0000BB">$replace</span><span style="color: #007700">, </span><span style="color: #0000BB">$subject</span><span style="color: #007700">)); <br /><br />echo </span><span style="color: #DD0000">"preg_replace renvoie\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">preg_replace</span><span style="color: #007700">(</span><span style="color: #0000BB">$pattern</span><span style="color: #007700">, </span><span style="color: #0000BB">$replace</span><span style="color: #007700">, </span><span style="color: #0000BB">$subject</span><span style="color: #007700">)); <br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents para"><p>L'exemple ci-dessus va afficher :</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
preg_filter renvoie
Array
(
[0] => A:C:1
[1] => B:C:a
[2] => A:2
[3] => B:b
[4] => A:3
[7] => A:4
)
preg_replace renvoie
Array
(
[0] => A:C:1
[1] => B:C:a
[2] => A:2
[3] => B:b
[4] => A:3
[5] => A
[6] => B
[7] => A:4
)
</pre></div>
</div>
</div><p>
</p>
</div>
<a name="function.preg-filter.seealso"></a><div class="refsect1 seealso">
<h3 class="title">Voir aussi</h3>
<p class="para">
</p><ul class="simplelist">
<li class="member"><a href="function.preg-replace.php" class="function" rel="rdfs-seeAlso">preg_replace()</a> - Rechercher et remplacer par expression rationnelle standard</li>
<li class="member"><a href="function.preg-replace-callback.php" class="function" rel="rdfs-seeAlso">preg_replace_callback()</a> - Rechercher et remplacer par expression rationnelle standard en utilisant une fonction de callback</li>
<li class="member"><a href="function.preg-match.php" class="function" rel="rdfs-seeAlso">preg_match()</a> - Expression rationnelle standard</li>
<li class="member"><a href="function.preg-split.php" class="function" rel="rdfs-seeAlso">preg_split()</a> - Éclate une chaîne par expression rationnelle</li>
</ul><p>
</p>
</div>
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