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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
/**
* Part of MIME_Type
*
* PHP version 4 and 5
*
* @category File
* @package MIME_Type
* @author Ian Eure <ieure@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @link http://pear.php.net/package/MIME_Type
*/
/**
* Class for working with MIME type parameters
*
* @category File
* @package MIME_Type
* @author Ian Eure <ieure@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @version Release: @version@
* @link http://pear.php.net/package/MIME_Type
*/
class MIME_Type_Parameter
{
/**
* Parameter name
*
* @var string
*/
var $name;
/**
* Parameter value
*
* @var string
*/
var $value;
/**
* Parameter comment
*
* @var string
*/
var $comment;
/**
* Constructor.
*
* @param string $param MIME parameter to parse, if set.
*
* @return void
*/
function MIME_Type_Parameter($param = false)
{
if ($param) {
$this->parse($param);
}
}
/**
* Parse a MIME type parameter and set object fields
*
* @param string $param MIME type parameter to parse
*
* @return void
*/
function parse($param)
{
$comment = '';
$param = MIME_Type::stripComments($param, $comment);
$this->name = $this->getAttribute($param);
$this->value = $this->getValue($param);
$this->comment = $comment;
}
/**
* Get a parameter attribute (e.g. name)
*
* @param string $param MIME type parameter
*
* @return string Attribute name
* @static
*/
function getAttribute($param)
{
$tmp = explode('=', $param);
return trim($tmp[0]);
}
/**
* Get a parameter value
*
* @param string $param MIME type parameter
*
* @return string Value
* @static
*/
function getValue($param)
{
$tmp = explode('=', $param, 2);
$value = $tmp[1];
$value = trim($value);
if ($value[0] == '"' && $value[strlen($value)-1] == '"') {
$value = substr($value, 1, -1);
}
$value = str_replace('\\"', '"', $value);
return $value;
}
/**
* Get a parameter comment
*
* @param string $param MIME type parameter
*
* @return string Parameter comment
* @see hasComment()
* @static
*/
function getComment($param)
{
$cs = strpos($param, '(');
if ($cs === false) {
return null;
}
$comment = substr($param, $cs);
return trim($comment, '() ');
}
/**
* Does this parameter have a comment?
*
* @param string $param MIME type parameter
*
* @return boolean true if $param has a comment, false otherwise
* @static
*/
function hasComment($param)
{
if (strstr($param, '(')) {
return true;
}
return false;
}
/**
* Get a string representation of this parameter
*
* This function performs the oppsite of parse()
*
* @return string String representation of parameter
*/
function get()
{
$val = $this->name . '="' . str_replace('"', '\\"', $this->value) . '"';
if ($this->comment) {
$val .= ' (' . $this->comment . ')';
}
return $val;
}
}
?>
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