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		<title>[PHP] Effectuer un is_file() ou file_exists() sur un fichier distant (HTTP)</title>
		<link>http://trollfactory.fr/php-effectuer-un-is_file-ou-file_exists-sur-un-fichier-distant-http-178</link>
		<comments>http://trollfactory.fr/php-effectuer-un-is_file-ou-file_exists-sur-un-fichier-distant-http-178#comments</comments>
		<pubDate>Thu, 18 Feb 2010 06:45:07 +0000</pubDate>
		<dc:creator><![CDATA[Troll]]></dc:creator>
				<category><![CDATA[Scripts, astuces, dév. web]]></category>
		<category><![CDATA[distant]]></category>
		<category><![CDATA[file_exists]]></category>
		<category><![CDATA[file_get_contents]]></category>
		<category><![CDATA[fopen]]></category>
		<category><![CDATA[http]]></category>
		<category><![CDATA[is_file]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[source]]></category>

		<guid isPermaLink="false">http://trollfactory.fr/?p=178</guid>
		<description><![CDATA[Dans la lignée de la précédente astuce sur les fichiers distants en voici une autre, plus courte, mais qui pourrait bien en dépanner plus d&#8217;un. En effet la fonction is_file() ou encore la fonction file_exists() sont des fonctions faites pour fonctionner sur le système de fichier local. Et elles ne fonctionneront donc pas si vous [...]]]></description>
				<content:encoded><![CDATA[<p>Dans la lignée de <a href="http://trollfactory.fr/php-date-de-derniere-modification-dun-fichier-distant-en-http-165">la précédente astuce sur les fichiers distants</a> en voici une autre, plus courte, mais qui pourrait bien en dépanner plus d&rsquo;un. En effet la fonction <strong>is_file()</strong> ou encore la fonction <strong>file_exists()</strong> sont des fonctions faites pour fonctionner sur le système de fichier local. Et elles ne fonctionneront donc pas si vous cherchez à savoir si le fichier &laquo;&nbsp;http://web.com/fichier.blabla&nbsp;&raquo; existe ou pas.</p>
<p>L&rsquo;astuce est toute simple, elle consiste à tenter d&rsquo;ouvrir le fichier, avec une fonction qui elle, prend en charge le HTTP :</p>
<pre>function FichierDistantExiste($url) {
   if(!@fopen($url, 'r')) return false;
   else return true;
}</pre>
<p>Ce fut bref, mais j&rsquo;espère que cela vous sera utile <img src="//trollfactory.fr/wp-includes/images/smilies/icon_smile.gif" alt=":)" class="wp-smiley" /></p>
<p>Attention par contre, sauf erreur de ma part certaines configurations PHP (notamment sur des mutualisés évidemment, mais pas tous hein) empêchent fopen() d&rsquo;utiliser le HTTP. Dans ce cas, on serait bien tenté d&rsquo;utiliser la fonction file_get_contents() sauf qu&rsquo;en fait ce n&rsquo;est qu&rsquo;une espèce de raccourci pour les fonction fopen(), fgets() et fclose() les un après les autres. Donc si l&rsquo;un est bridé l&rsquo;autre devrait l&rsquo;être aussi. À vous de tester, on ne sait jamais.</p>
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		</item>
		<item>
		<title>[PHP] Date de dernière modification d&#8217;un fichier distant en HTTP</title>
		<link>http://trollfactory.fr/php-date-de-derniere-modification-dun-fichier-distant-en-http-165</link>
		<comments>http://trollfactory.fr/php-date-de-derniere-modification-dun-fichier-distant-en-http-165#comments</comments>
		<pubDate>Thu, 18 Feb 2010 06:35:01 +0000</pubDate>
		<dc:creator><![CDATA[Troll]]></dc:creator>
				<category><![CDATA[Non classé]]></category>
		<category><![CDATA[Scripts, astuces, dév. web]]></category>
		<category><![CDATA[date de modification]]></category>
		<category><![CDATA[distant]]></category>
		<category><![CDATA[filemtime]]></category>
		<category><![CDATA[http]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[source]]></category>

		<guid isPermaLink="false">http://trollfactory.fr/?p=165</guid>
		<description><![CDATA[Cette source n&#8217;est pas de moi, cependant comme je ne suis pas sûr que tous les gens qui cherchent comment récupérer la date de dernière modification d&#8217;un fichier en utilisant le HTTP (fichier distant) arrivent facilement à trouver ce post (en anglais en plus) je vous mets la source ici. D&#8217;ailleurs, au passage, comme je [...]]]></description>
				<content:encoded><![CDATA[<p>Cette source n&rsquo;est pas de moi, cependant comme je ne suis pas sûr que tous les gens qui cherchent <strong>comment récupérer la date de dernière modification d&rsquo;un fichier en utilisant le HTTP (fichier distant)</strong> arrivent facilement à trouver <a href="http://www.php.net/manual/en/function.filemtime.php#73747">ce post (en anglais en plus)</a> je vous mets la source ici.</p>
<p>D&rsquo;ailleurs, au passage, comme je suis un gentil Troll, je vous l&rsquo;ai traduite <img src="//trollfactory.fr/wp-includes/images/smilies/icon_smile.gif" alt=":)" class="wp-smiley" /></p>
<pre>
// Récupérer la date de dernière modification d'un fichier distant (la fonction retourne un timestamp unix, cf. http://wiki.pcinfo-web.com/timestamp )
function RecupDateModifDistant( $uri )
{
// default
$unixtime = 0;
$fp = fopen( $uri, "r" );
if( !$fp ) {return;}

$MetaData = stream_get_meta_data( $fp );

foreach( $MetaData['wrapper_data'] as $response )
{
// Dans le cas d'une redirection vers une autre page / un autre fichier
if( substr( strtolower($response), 0, 10 ) == 'location: ' )
{
$newUri = substr( $response, 10 );
fclose( $fp );
return RecupDateModifDistant( $newUri );
}
// Dans le cas où on a bien l'en-tête "last-modified"
elseif( substr( strtolower($response), 0, 15 ) == 'last-modified: ' )
{
$unixtime = strtotime( substr($response, 15) );
break;
}
}
fclose( $fp );
return $unixtime;
}
</pre>
<p>Voilà, pour toute demande d&rsquo;explication du code, les commentaires sont là pour ça, ils vous attendent pour vous faire des calins ! (gratuit !)</p>
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