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Url.php
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Url.php
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<?php
namespace wpscholar;
/**
* Class Url
*
* @property string $url
* @property string $scheme
* @property string $user
* @property string $pass
* @property string $host
* @property string $port
* @property string $path
* @property string $query
* @property string $fragment
*/
class Url {
/**
* Full URL.
*
* @var string
*/
protected $_url;
/**
* URL scheme.
*
* @var string
*/
protected $_scheme;
/**
* URL host.
*
* @var string
*/
protected $_host;
/**
* URL username.
*
* @var string
*/
protected $_user;
/**
* URL password.
*
* @var string
*/
protected $_pass;
/**
* URL path.
*
* @var string
*/
protected $_path;
/**
* URL port.
*
* @var string
*/
protected $_port;
/**
* URL query string.
*
* @var string
*/
protected $_query;
/**
* URL fragment.
*
* @var string
*/
protected $_fragment;
/**
* Get the current URL.
*
* @return string
*/
public static function getCurrentUrl() {
return self::getCurrentScheme() . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
}
/**
* Get the current URL scheme.
*
* @return string
*/
public static function getCurrentScheme() {
// Check HTTPS server variable
if ( isset( $_SERVER['HTTPS'] ) ) {
if ( 'on' === strtolower( $_SERVER['HTTPS'] ) ) {
return 'https';
}
if ( '1' === (string) $_SERVER['HTTPS'] ) {
return 'https';
}
}
// Check port
if ( isset( $_SERVER['SERVER_PORT'] ) && '443' === (string) $_SERVER['SERVER_PORT'] ) {
return 'https';
}
// Check forwarded protocol
if ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && 'https' === $_SERVER['HTTP_X_FORWARDED_PROTO'] ) {
return 'https';
}
return 'http';
}
/**
* Build a URL from its component parts.
*
* @param array $parts Array containing URL components with possible keys:
* 'scheme', 'user', 'pass', 'host', 'port', 'path',
* 'query', 'fragment'
*
* @return string The constructed URL
*/
public static function buildUrl( array $parts ) {
$url = '';
if ( ! empty( $parts['scheme'] ) ) {
$url .= $parts['scheme'] . '://';
}
if ( ! empty( $parts['user'] ) ) {
$url .= $parts['user'];
}
if ( ! empty( $parts['pass'] ) ) {
$url .= ':' . $parts['pass'];
}
if ( ! empty( $parts['user'] ) || ! empty( $parts['pass'] ) ) {
$url .= '@';
}
if ( ! empty( $parts['host'] ) ) {
$url .= $parts['host'];
}
if ( ! empty( $parts['port'] ) ) {
$url .= ':' . $parts['port'];
}
if ( ! empty( $parts['path'] ) ) {
$url .= $parts['path'];
}
if ( ! empty( $parts['query'] ) ) {
$url .= '?' . $parts['query'];
}
if ( ! empty( $parts['fragment'] ) ) {
$url .= '#' . $parts['fragment'];
}
return $url;
}
/**
* Build a path from its component parts.
*
* @param array $segments Array of path segments to combine into a path
* @param bool $trailing_slash Whether to append a trailing slash to the path
*
* @return string The constructed path string
*/
public static function buildPath( array $segments, $trailing_slash = false ) {
$path = '';
if ( ! empty( $segments ) ) {
$path .= '/' . implode( '/', $segments );
}
if ( $trailing_slash ) {
$path .= '/';
}
return $path;
}
/**
* Strip the query string from a URL.
*
* @param string $url The URL to strip the query string from
*
* @return string The URL with query string removed
*/
public static function stripQueryString( $url ) {
$url = new self( $url );
$url->query = '';
return $url->toString();
}
/**
* Create a new instance.
*
* @param string $url The URL to parse, defaults to current URL if empty
*/
public function __construct( $url = '' ) {
if ( empty( $url ) ) {
$url = self::getCurrentUrl();
}
$this->parseUrl( $url );
}
/**
* Parse a URL into its component parts.
*
* @param string $url The URL string to parse into components
*
* @return $this
*/
public function parseUrl( $url ) {
$this->_url = $url;
$this->_scheme = (string) parse_url( $url, PHP_URL_SCHEME );
$this->_user = (string) parse_url( $url, PHP_URL_USER );
$this->_pass = (string) parse_url( $url, PHP_URL_PASS );
$this->_host = (string) parse_url( $url, PHP_URL_HOST );
$this->_port = (string) parse_url( $url, PHP_URL_PORT );
$this->_path = (string) parse_url( $url, PHP_URL_PATH );
$this->_query = (string) parse_url( $url, PHP_URL_QUERY );
$this->_fragment = (string) parse_url( $url, PHP_URL_FRAGMENT );
return $this;
}
/**
* Check if URL has a trailing slash.
*
* @return bool
*/
public function hasTrailingSlash() {
return is_string( $this->path ) && '/' === substr( $this->path, - 1, 1 );
}
/**
* Get URL path segments.
*
* @return string[]
*/
public function getSegments() {
return array_filter( explode( '/', trim( $this->_path, '/' ) ) );
}
/**
* Get a URL path segment by index.
*
* @param int $index The zero-based position of the segment to retrieve
*
* @return string|null
*/
public function getSegment( $index = 0 ) {
$segments = $this->getSegments();
return array_key_exists( $index, $segments ) ? $segments[ $index ] : null;
}
/**
* Add a query variable to the URL.
*
* @param string $name The name of the query variable to add
* @param string $value The value to set for the query variable
*
* @return string The complete URL string with the added query variable
*/
public function addQueryVar( $name, $value ) {
$query_vars = $this->getQueryVars();
$query_vars[ $name ] = $value;
$this->query = http_build_query( $query_vars, '', '&' );
return $this->toString();
}
/**
* Remove a query variable from the URL.
*
* @param string $name The name of the query variable to remove
*
* @return string The complete URL string with the query variable removed
*/
public function removeQueryVar( $name ) {
$query_vars = $this->getQueryVars();
unset( $query_vars[ $name ] );
$this->query = http_build_query( $query_vars );
return $this->toString();
}
/**
* Get a query variable from the URL.
*
* @param string $name The name of the query variable to retrieve
*
* @return string|null
*/
public function getQueryVar( $name ) {
$query_vars = $this->getQueryVars();
return array_key_exists( $name, $query_vars ) ? $query_vars[ $name ] : null;
}
/**
* Get all the query variables from the URL.
*
* @return array
*/
public function getQueryVars() {
$query_vars = array();
parse_str( $this->_query, $query_vars );
return $query_vars;
}
/**
* Add a fragment to the URL.
*
* @param string $value The fragment to add to the URL
*
* @return string The complete URL string with the fragment added
*/
public function addFragment( $value ) {
$this->fragment = $value;
return $this->toString();
}
/**
* Returns the URL as an array.
*
* @return array
*/
public function toArray() {
return array(
'scheme' => $this->_scheme,
'user' => $this->_user,
'pass' => $this->_pass,
'host' => $this->_host,
'port' => $this->_port,
'path' => $this->_path,
'query' => $this->_query,
'fragment' => $this->_fragment,
);
}
/**
* Returns the URL as a string.
*
* @return string
*/
public function toString() {
return $this->_url;
}
/**
* Magic method to output object as a string.
*
* @return string
*/
public function __toString() {
return $this->toString();
}
/**
* Magic method for getting properties.
*
* @param string $name The name of the property to get
*
* @return string|int|null The value of the property if it exists, null otherwise
*/
public function __get( $name ) {
$value = null;
$property = "_{$name}";
if ( property_exists( $this, $property ) ) {
$value = $this->{$property};
}
return $value;
}
/**
* Magic method for setting properties.
*
* @param string $name Property name to set.
* @param string|null $value Property value to set.
*
* @return $this
*/
public function __set( $name, $value ) {
$property = "_{$name}";
if ( 'url' === $name ) {
// If setting URL, parse and set all the URL parts
$this->parseUrl( (string) $value );
} elseif ( property_exists( $this, $property ) ) {
// If setting a URL part, build and set the full URL
$this->$property = (string) $value;
$this->_url = self::buildUrl( $this->toArray() );
}
return $this;
}
}