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?>
<div id="function.imagecreatefrompng" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">imagecreatefrompng</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">imagecreatefrompng</span> &mdash; <span class="dc-title">Crée une nouvelle image depuis un fichier ou une URL</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.imagecreatefrompng-description">
  <h3 class="title">Description</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>imagecreatefrompng</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$filename</code></span>): <span class="type"><span class="type"><a href="class.gdimage.php" class="type GdImage">GdImage</a></span>|<span class="type"><a href="language.types.singleton.php" class="type false">false</a></span></span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>imagecreatefrompng()</strong></span> retourne un identifiant d&#039;image
   représentant une image obtenue à partir du fichier
   <code class="parameter">filename</code>.
  </p>
  <div class="tip"><strong class="tip">Astuce</strong><p class="simpara">
 Vous pouvez utiliser une URL comme nom de fichier avec cette fonction, si le
 <a href="filesystem.configuration.php#ini.allow-url-fopen" class="link">gestionnaire fopen</a> a été activé. Voyez <span class="function"><a href="function.fopen.php" class="function">fopen()</a></span>
 pour plus de détails sur la façon de spécifier le nom du fichier. Reportez-vous aux
 <a href="wrappers.php" class="xref">Liste des protocoles et des gestionnaires support&eacute;s</a> pour plus d&#039;informations sur les capacités des différents gestionnaires,
 les notes sur leur utilisation, ainsi que les informations sur les variables prédéfinies qu&#039;elles fournissent.
</p></div>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.imagecreatefrompng-parameters">
  <h3 class="title">Liste de paramètres</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">filename</code></dt>
     <dd>
      <p class="para">
       Chemin vers l&#039;image PNG.
      </p>
     </dd>
    
   </dl>
  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.imagecreatefrompng-returnvalues">
  <h3 class="title">Valeurs de retour</h3>
  <p class="para">Retourne un objet d&#039;image en cas de succès, ou <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> si une erreur survient.</p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.imagecreatefrompng-changelog">
  <h3 class="title">Historique</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>Version</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>8.0.0</td>
      <td>
       En cas de succès, cette fonction retourne désormais une instance de
       <span class="classname"><a href="class.gdimage.php" class="classname">GDImage</a></span> ; auparavant,
       une <span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span> était retournée.
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 examples" id="refsect1-function.imagecreatefrompng-examples">
  <h3 class="title">Exemples</h3>
  <div class="example" id="example-1">
   <p><strong>Exemple #1 Exemple de gestion d&#039;une erreur lors du chargement d&#039;une image PNG</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">LoadPNG</span><span style="color: #007700">(</span><span style="color: #0000BB">$imgname</span><span style="color: #007700">)<br />{<br />    </span><span style="color: #FF8000">/* Tente d'ouvrir l'image */<br />    </span><span style="color: #0000BB">$im </span><span style="color: #007700">= @</span><span style="color: #0000BB">imagecreatefrompng</span><span style="color: #007700">(</span><span style="color: #0000BB">$imgname</span><span style="color: #007700">);<br /><br />    </span><span style="color: #FF8000">/* Traitement en cas d'échec */<br />    </span><span style="color: #007700">if(!</span><span style="color: #0000BB">$im</span><span style="color: #007700">)<br />    {<br />        </span><span style="color: #FF8000">/* Création d'une image vide */<br />        </span><span style="color: #0000BB">$im  </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">30</span><span style="color: #007700">);<br />        </span><span style="color: #0000BB">$bgc </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br />        </span><span style="color: #0000BB">$tc  </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br />        </span><span style="color: #0000BB">imagefilledrectangle</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">30</span><span style="color: #007700">, </span><span style="color: #0000BB">$bgc</span><span style="color: #007700">);<br /><br />        </span><span style="color: #FF8000">/* On y affiche un message d'erreur */<br />        </span><span style="color: #0000BB">imagestring</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #DD0000">'Erreur de chargement ' </span><span style="color: #007700">. </span><span style="color: #0000BB">$imgname</span><span style="color: #007700">, </span><span style="color: #0000BB">$tc</span><span style="color: #007700">);<br />    }<br /><br />    return </span><span style="color: #0000BB">$im</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-Type: image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$img </span><span style="color: #007700">= </span><span style="color: #0000BB">LoadPNG</span><span style="color: #007700">(</span><span style="color: #DD0000">'bogus.image'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
   </div>

   <div class="example-contents"><p>Résultat de l&#039;exemple ci-dessus est similaire à :</p></div>
   <div class="mediaobject">
    
    <div class="imageobject">
     <img src="images/21009b70229598c6a80eef8b45bf282b-imagecreatefrompng.png" alt="Exemple avec la fonction imagecreatefrompng()" width="150" height="30" />
    </div>
   </div>
  </div>
 </div>

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