Fileinfo 函数
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finfo_buffer

finfo::buffer

(PHP 5 >= 5.3.0, PECL fileinfo >= 0.1.0)

finfo_buffer -- finfo::buffer — Return information about a string buffer

说明

过程化风格

string finfo_buffer ( resource $finfo , string $string = NULL [, int $options = FILEINFO_NONE [, resource $context = NULL ]] )

面向对象风格

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.

参数

finfo

Fileinfo resource returned by finfo_open().

string

Content of a file to be checked.

options

One or disjunction of more Fileinfo constants.

context

返回值

Returns a textual description of the string argument, or FALSE if an error occurred.

范例

Example #1 A finfo_buffer() example

<?php
$finfo = new finfo(FILEINFO_MIME);
echo $finfo->buffer($_POST["script"]) . "\n";
?>

以上例程的输出类似于：

application/x-sh; charset=us-ascii

参见

Fileinfo 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Return information about a string buffer

用户评论:

contact at ingnu dot fr (20-Jun-2011 10:22)

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).