finfo_open

finfo::__construct

(PHP >= 5.3.0, PHP 7, PHP 8, PECL fileinfo >= 0.1.0)

finfo_open -- finfo::__constructCreate a new finfo instance

Descrizione

Stile procedurale

finfo_open(int $flags = FILEINFO_NONE, ?string $magic_database = null): finfo|false

Stile orientato agli oggetti (constructor):

public finfo::__construct(int $flags = FILEINFO_NONE, ?string $magic_database = null)

This function opens a magic database and returns its instance.

Elenco dei parametri

flags

One or disjunction of more Fileinfo constants.

magic_database

Name 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.

Valori restituiti

(Procedural style only) Returns an finfo instance on success, o false in caso di fallimento.

Log delle modifiche

Versione Descrizione
8.1.0 Returns an finfo instance now; previously, a resource was returned.
8.0.3 magic_database is nullable now.

Esempi

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

Note

Nota:

Generally, using the bundled magic database (by leaving magic_database and the MAGIC environment variables unset) is the best course of action unless you specifically need a custom magic database.

Vedere anche: