finfo_buffer
finfo::buffer
(PHP 5 >= 5.3.0, PECL fileinfo >= 0.1.0)
finfo_buffer -- finfo::buffer — Return information about a string buffer
Description
Procedural style
string finfo_buffer
( resource
$finfo
, string $string = NULL
[, int $options = FILEINFO_NONE
[, resource $context = NULL
]] )Object oriented style
public string finfo::buffer
( string
$string = NULL
[, int $options = FILEINFO_NONE
[, resource $context = NULL
]] )This function is used to get information about binary data in a string.
Parameters
-
finfo -
Fileinfo resource returned by finfo_open().
-
string -
Content of a file to be checked.
-
options -
One or disjunction of more Fileinfo constants.
-
context -
Return Values
Returns a textual description of the string
argument, or FALSE if an error occurred.
Examples
Example #1 A finfo_buffer() example
<?php
$finfo = new finfo(FILEINFO_MIME);
echo $finfo->buffer($_POST["script"]) . "\n";
?>
The above example will output something similar to:
application/x-sh; charset=us-ascii
Коментарии
You can easily check mime type of an internet resource using this code :
<?php
function getUrlMimeType($url) {
$buffer = file_get_contents($url);
$finfo = new finfo(FILEINFO_MIME_TYPE);
return $finfo->buffer($buffer);
}
?>
I'm using it to detect if an url given by a user is a HTML page (so I do some stuff with the HTML) or a file on Internet (so I show an icon accordingly to the mime type).
You should never rely on finfo::buffer to get the MimeType of a file, you must always save the file physically or temporariliy and use finfo_open to get MimeType. I tested it with an excell file, with buffer it says octet-stream that is not valid, with finfo_open it says ms-excell as correct.