(PHP >= 5.3.0, PECL fileinfo >= 0.1.0)
finfo_open -- finfo->__construct — Create a new fileinfo resource
过程化风格
面向对象风格 (constructor):
This function opens a magic database and returns its resource.
One or disjunction of more Fileinfo constants.
Name of a magic database file, usually something like /path/to/magic.mime. If not specified, the MAGIC environment variable is used. If this variable is not set either, /usr/share/misc/magic is used by default. A .mime and/or .mgc suffix is added if needed.
Passing NULL or an empty string will be equivalent to the default value.
Returns a magic database resource on success 或者在失败时返回 FALSE.
Example #1 Object oriented style
<?php
$finfo = new finfo(FILEINFO_MIME, "/usr/share/misc/magic"); // return mime type ala mimetype extension
if (!$finfo) {
echo "Opening fileinfo database failed";
exit();
}
/* get mime-type for a specific file */
$filename = "/usr/local/something.txt";
echo $finfo->file($filename);
?>
Example #2 Procedural style
<?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);
?>
以上例程会输出：
text/plain; charset=us-ascii