url.php

来自「PHP 知识管理系统（基于树结构的知识管理系统）, 英文原版的PHP源码。」· PHP 代码 · 共 528 行 · 第 1/2 页

    
    /**
     *    Accessor for page if any. This may be a
     *    directory name if ambiguious.
     *    @return            Page name.
     *    @access public
     */
    function getPage() {
        if (! preg_match('/([^\/]*?)$/', $this->getPath(), $matches)) {
            return false;
        }
        return $matches[1];
    }
    
    /**
     *    Gets the path to the page.
     *    @return string       Path less the page.
     *    @access public
     */
    function getBasePath() {
        if (! preg_match('/(.*\/)[^\/]*?$/', $this->getPath(), $matches)) {
            return false;
        }
        return $matches[1];
    }
    
    /**
     *    Accessor for fragment at end of URL after the "#".
     *    @return string    Part after "#".
     *    @access public
     */
    function getFragment() {
        return $this->_fragment;
    }
    
    /**
     *    Sets image coordinates. Set to false to clear
     *    them.
     *    @param integer $x    Horizontal position.
     *    @param integer $y    Vertical position.
     *    @access public
     */
    function setCoordinates($x = false, $y = false) {
        if (($x === false) || ($y === false)) {
            $this->_x = $this->_y = false;
            return;
        }
        $this->_x = (integer)$x;
        $this->_y = (integer)$y;
    }
    
    /**
     *    Accessor for horizontal image coordinate.
     *    @return integer        X value.
     *    @access public
     */
    function getX() {
        return $this->_x;
    }
        
    /**
     *    Accessor for vertical image coordinate.
     *    @return integer        Y value.
     *    @access public
     */
    function getY() {
        return $this->_y;
    }
    
    /**
     *    Accessor for current request parameters
     *    in URL string form. Will return teh original request
     *    if at all possible even if it doesn't make much
     *    sense.
     *    @return string   Form is string "?a=1&b=2", etc.
     *    @access public
     */
    function getEncodedRequest() {
        if ($this->_raw) {
            $encoded = $this->_raw;
        } else {
            $encoded = $this->_request->asUrlRequest();
        }
        if ($encoded) {
            return '?' . preg_replace('/^\?/', '', $encoded);
        }
        return '';
    }
    
    /**
     *    Adds an additional parameter to the request.
     *    @param string $key            Name of parameter.
     *    @param string $value          Value as string.
     *    @access public
     */
    function addRequestParameter($key, $value) {
        $this->_raw = false;
        $this->_request->add($key, $value);
    }
    
    /**
     *    Adds additional parameters to the request.
     *    @param hash/SimpleFormEncoding $parameters   Additional
     *                                                parameters.
     *    @access public
     */
    function addRequestParameters($parameters) {
        $this->_raw = false;
        $this->_request->merge($parameters);
    }
    
    /**
     *    Clears down all parameters.
     *    @access public
     */
    function clearRequest() {
        $this->_raw = false;
        $this->_request = &new SimpleGetEncoding();
    }
    
    /**
     *    Gets the frame target if present. Although
     *    not strictly part of the URL specification it
     *    acts as similarily to the browser.
     *    @return boolean/string    Frame name or false if none.
     *    @access public
     */
    function getTarget() {
        return $this->_target;
    }
    
    /**
     *    Attaches a frame target.
     *    @param string $frame        Name of frame.
     *    @access public
     */
    function setTarget($frame) {
        $this->_raw = false;
        $this->_target = $frame;
    }
    
    /**
     *    Renders the URL back into a string.
     *    @return string        URL in canonical form.
     *    @access public
     */
    function asString() {
        $path = $this->_path;
        $scheme = $identity = $host = $encoded = $fragment = '';
        if ($this->_username && $this->_password) {
            $identity = $this->_username . ':' . $this->_password . '@';
        }
        if ($this->getHost()) {
            $scheme = $this->getScheme() ? $this->getScheme() : 'http';
            $scheme .= "://";
            $host = $this->getHost();
        }
        if (substr($this->_path, 0, 1) == '/') {
            $path = $this->normalisePath($this->_path);
        }
        $encoded = $this->getEncodedRequest();
        $fragment = $this->getFragment() ? '#'. $this->getFragment() : '';
        $coords = $this->getX() === false ? '' : '?' . $this->getX() . ',' . $this->getY();
        return "$scheme$identity$host$path$encoded$fragment$coords";
    }
    
    /**
     *    Replaces unknown sections to turn a relative
     *    URL into an absolute one. The base URL can
     *    be either a string or a SimpleUrl object.
     *    @param string/SimpleUrl $base       Base URL.
     *    @access public
     */
    function makeAbsolute($base) {
        if (! is_object($base)) {
            $base = new SimpleUrl($base);
        }
        if ($this->getHost()) {
            $scheme = $this->getScheme();
            $host = $this->getHost();
            $port = $this->getPort() ? ':' . $this->getPort() : '';
            $identity = $this->getIdentity() ? $this->getIdentity() . '@' : '';
            if (! $identity) {
                $identity = $base->getIdentity() ? $base->getIdentity() . '@' : '';
            }
        } else {
            $scheme = $base->getScheme();
            $host = $base->getHost();
            $port = $base->getPort() ? ':' . $base->getPort() : '';
            $identity = $base->getIdentity() ? $base->getIdentity() . '@' : '';
        }
        $path = $this->normalisePath($this->_extractAbsolutePath($base));
        $encoded = $this->getEncodedRequest();
        $fragment = $this->getFragment() ? '#'. $this->getFragment() : '';
        $coords = $this->getX() === false ? '' : '?' . $this->getX() . ',' . $this->getY();
        return new SimpleUrl("$scheme://$identity$host$port$path$encoded$fragment$coords");
    }
    
    /**
     *    Replaces unknown sections of the path with base parts
     *    to return a complete absolute one.
     *    @param string/SimpleUrl $base       Base URL.
     *    @param string                       Absolute path.
     *    @access private
     */
    function _extractAbsolutePath($base) {
        if ($this->getHost()) {
            return $this->_path;
        }
        if (! $this->_isRelativePath($this->_path)) {
            return $this->_path;
        }
        if ($this->_path) {
            return $base->getBasePath() . $this->_path;
        }
        return $base->getPath();
    }
    
    /**
     *    Simple test to see if a path part is relative.
     *    @param string $path        Path to test.
     *    @return boolean            True if starts with a "/".
     *    @access private
     */
    function _isRelativePath($path) {
        return (substr($path, 0, 1) != '/');
    }
    
    /**
     *    Extracts the username and password for use in rendering
     *    a URL.
     *    @return string/boolean    Form of username:password or false.
     *    @access public
     */
    function getIdentity() {
        if ($this->_username && $this->_password) {
            return $this->_username . ':' . $this->_password;
        }
        return false;
    }
    
    /**
     *    Replaces . and .. sections of the path.
     *    @param string $path    Unoptimised path.
     *    @return string         Path with dots removed if possible.
     *    @access public
     */
    function normalisePath($path) {
        $path = preg_replace('|/\./|', '/', $path);
        return preg_replace('|/[^/]+/\.\./|', '/', $path);
    }
    
    /**
     *    A pipe seperated list of all TLDs that result in two part
     *    domain names.
     *    @return string        Pipe separated list.
     *    @access public
     *    @static
     */
    function getAllTopLevelDomains() {
        return 'com|edu|net|org|gov|mil|int|biz|info|name|pro|aero|coop|museum';
    }
}
?>