(PHP >= 5.3.0, PECL fileinfo >= 0.1.0)
finfo_open -- finfo::__construct — Create a new fileinfo resource
Stile procedurale
$options = FILEINFO_NONE
[, string $magic_file = NULL
]] )Stile orientato agli oggetti (constructor):
$options = FILEINFO_NONE
[, string $magic_file = NULL
]] )This function opens a magic database and returns its resource.
optionsOne or disjunction of more Fileinfo constants.
magic_fileName of a magic database file, usually something like /path/to/magic.mime. If not specified, the MAGIC environment variable is used. If the environment variable isn't set, then PHP's bundled magic database will be used.
Passing NULL or an empty string will be equivalent to the default
value.
(Procedural style only)
Returns a magic database resource on success o FALSE in caso di fallimento.
The expected magic database format changed in PHP 5.3.11 and 5.4.1. Due to this, the internal magic database was upgraded. This mostly effects code where an external magic database is used: reading an older magic file will now fail. Also, some textual representations of the mime types has changed, for instance for PHP would be "PHP script, ASCII text" instead of "PHP script text" returned.
Nota:
Generally, using the bundled magic database (by leaving
magic_fileand the MAGIC environment variables unset) is the best course of action unless you specifically need a custom magic database.
Example #1 Stile orientato agli oggetti
<?php
$finfo = new finfo(FILEINFO_MIME, "/usr/share/misc/magic"); // return mime type ala mimetype extension
/* get mime-type for a specific file */
$filename = "/usr/local/something.txt";
echo $finfo->file($filename);
?>
Example #2 Stile procedurale
<?php
$finfo = finfo_open(FILEINFO_MIME, "/usr/share/misc/magic"); // return mime type ala mimetype extension
if (!$finfo) {
echo "Opening fileinfo database failed";
exit();
}
/* get mime-type for a specific file */
$filename = "/usr/local/something.txt";
echo finfo_file($finfo, $filename);
/* close connection */
finfo_close($finfo);
?>
Il precedente esempio visualizzerà:
text/plain; charset=us-ascii