finfo_buffer
(PECL fileinfo:0.1-1.0.4)
finfo_buffer — Return information about a string buffer
Описание
string finfo_buffer
( resource $finfo
, string $string
[, int $options
[, resource $context
]] )
finfo
string buffer
( string $string
[, int $options
[, resource $context
]] )
This function is used to get information about binary data in a string.
Список параметров
- finfo
-
Fileinfo resource returned by finfo_open().
- string
-
Content of a file to be checked.
- options
-
One or disjunction of more Fileinfo constants.
- context
-
Возвращаемые значения
Returns a textual description of the string argument, or FALSE if an error occurred.
Примеры
Пример #1 A finfo_buffer() example
<?php
$finfo = new finfo(FILEINFO_MIME);
echo $finfo->buffer($_POST["script"]) . "\n";
?>
Результатом выполнения данного примера будет что-то подобное:
application/x-sh
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.