rewrite.php 29.6 KB
Newer Older
1 2 3 4 5 6
<?php

/* WP_Rewrite API
*******************************************************************************/

//Add a straight rewrite rule
7
function add_rewrite_rule($regex, $redirect, $after = 'bottom') {
8 9 10 11 12 13 14 15 16 17 18
	global $wp_rewrite;
	$wp_rewrite->add_rule($regex, $redirect);
}

//Add a new tag (like %postname%)
//warning: you must call this on init or earlier, otherwise the query var addition stuff won't work
function add_rewrite_tag($tagname, $regex) {
	//validation
	if (strlen($tagname) < 3 || $tagname{0} != '%' || $tagname{strlen($tagname)-1} != '%') {
		return;
	}
19

20
	$qv = trim($tagname, '%');
21

22 23 24 25 26
	global $wp_rewrite, $wp;
	$wp->add_query_var($qv);
	$wp_rewrite->add_rewrite_tag($tagname, $regex, $qv . '=');
}

27
//Add a new feed type like /atom1/
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
function add_feed($feedname, $function) {
	global $wp_rewrite;
	if (!in_array($feedname, $wp_rewrite->feeds)) { //override the file if it is
		$wp_rewrite->feeds[] = $feedname;
	}
	$hook = 'do_feed_' . $feedname;
	remove_action($hook, $function, 10, 1);
	add_action($hook, $function, 10, 1);
	return $hook;
}

define('EP_PERMALINK',  1   );
define('EP_ATTACHMENT', 2   );
define('EP_DATE',       4   );
define('EP_YEAR',       8   );
define('EP_MONTH',      16  );
define('EP_DAY',        32  );
define('EP_ROOT',       64  );
define('EP_COMMENTS',   128 );
define('EP_SEARCH',     256 );
define('EP_CATEGORIES', 512 );
49 50 51
define('EP_TAGS', 1024 );
define('EP_AUTHORS',    2048);
define('EP_PAGES',      4096);
52 53
//pseudo-places
define('EP_NONE',       0  );
54
define('EP_ALL',        8191);
55 56 57 58 59 60 61

//and an endpoint, like /trackback/
function add_rewrite_endpoint($name, $places) {
	global $wp_rewrite;
	$wp_rewrite->add_endpoint($name, $places);
}

62 63 64 65
// examine a url (supposedly from this blog) and try to
// determine the post ID it represents.
function url_to_postid($url) {
	global $wp_rewrite;
ryan's avatar
ryan committed
66

67
	$url = apply_filters('url_to_postid', $url);
68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89

	// First, check to see if there is a 'p=N' or 'page_id=N' to match against
	preg_match('#[?&](p|page_id)=(\d+)#', $url, $values);
	$id = intval($values[2]);
	if ( $id ) return $id;

	// Check to see if we are using rewrite rules
	$rewrite = $wp_rewrite->wp_rewrite_rules();

	// Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options
	if ( empty($rewrite) )
		return 0;

	// $url cleanup by Mark Jaquith
	// This fixes things like #anchors, ?query=strings, missing 'www.',
	// added 'www.', or added 'index.php/' that will mess up our WP_Query
	// and return a false negative

	// Get rid of the #anchor
	$url_split = explode('#', $url);
	$url = $url_split[0];

ryan's avatar
ryan committed
90
	// Get rid of URL ?query=string
91 92 93 94
	$url_split = explode('?', $url);
	$url = $url_split[0];

	// Add 'www.' if it is absent and should be there
95
	if ( false !== strpos(get_option('home'), '://www.') && false === strpos($url, '://www.') )
96 97 98
		$url = str_replace('://', '://www.', $url);

	// Strip 'www.' if it is present and shouldn't be
99
	if ( false === strpos(get_option('home'), '://www.') )
100 101 102
		$url = str_replace('://www.', '://', $url);

	// Strip 'index.php/' if we're not using path info permalinks
103
	if ( !$wp_rewrite->using_index_permalinks() )
104 105
		$url = str_replace('index.php/', '', $url);

106
	if ( false !== strpos($url, get_option('home')) ) {
107
		// Chop off http://domain.com
108
		$url = str_replace(get_option('home'), '', $url);
109 110
	} else {
		// Chop off /path/to/blog
111
		$home_path = parse_url(get_option('home'));
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
		$home_path = $home_path['path'];
		$url = str_replace($home_path, '', $url);
	}

	// Trim leading and lagging slashes
	$url = trim($url, '/');

	$request = $url;

	// Done with cleanup

	// Look for matches.
	$request_match = $request;
	foreach ($rewrite as $match => $query) {
		// If the requesting file is the anchor of the match, prepend it
		// to the path info.
		if ( (! empty($url)) && (strpos($match, $url) === 0) ) {
			$request_match = $url . '/' . $request;
		}

		if ( preg_match("!^$match!", $request_match, $matches) ) {
			// Got a match.
			// Trim the query of everything up to the '?'.
			$query = preg_replace("!^.+\?!", '', $query);

			// Substitute the substring matches into the query.
			eval("\$query = \"$query\";");
			$query = new WP_Query($query);
			if ( $query->is_single || $query->is_page )
				return $query->post->ID;
			else
				return 0;
		}
	}
	return 0;
}

149 150 151 152 153
/* WP_Rewrite class
*******************************************************************************/

class WP_Rewrite {
	var $permalink_structure;
154
	var $use_trailing_slashes;
155
	var $category_base;
156
	var $tag_base;
157
	var $category_structure;
158
	var $tag_structure;
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
	var $author_base = 'author';
	var $author_structure;
	var $date_structure;
	var $page_structure;
	var $search_base = 'search';
	var $search_structure;
	var $comments_base = 'comments';
	var $feed_base = 'feed';
	var $comments_feed_structure;
	var $feed_structure;
	var $front;
	var $root = '';
	var $index = 'index.php';
	var $matches = '';
	var $rules;
174 175 176
	var $extra_rules = array(); //those not generated by the class, see add_rewrite_rule()
	var $extra_rules_top = array(); //those not generated by the class, see add_rewrite_rule()
	var $non_wp_rules = array(); //rules that don't redirect to WP's index.php
177 178
	var $endpoints;
	var $use_verbose_rules = false;
179
	var $rewritecode =
180 181 182 183 184 185 186 187 188 189
		array(
					'%year%',
					'%monthnum%',
					'%day%',
					'%hour%',
					'%minute%',
					'%second%',
					'%postname%',
					'%post_id%',
					'%category%',
190
					'%tag%',
191 192 193 194 195
					'%author%',
					'%pagename%',
					'%search%'
					);

196
	var $rewritereplace =
197 198 199 200 201 202 203 204 205 206
		array(
					'([0-9]{4})',
					'([0-9]{1,2})',
					'([0-9]{1,2})',
					'([0-9]{1,2})',
					'([0-9]{1,2})',
					'([0-9]{1,2})',
					'([^/]+)',
					'([0-9]+)',
					'(.+?)',
207
					'(.+?)',
208 209 210 211 212
					'([^/]+)',
					'([^/]+)',
					'(.+)'
					);

213
	var $queryreplace =
214 215 216 217 218 219 220 221 222 223
		array (
					'year=',
					'monthnum=',
					'day=',
					'hour=',
					'minute=',
					'second=',
					'name=',
					'p=',
					'category_name=',
224
					'tag=',
225 226 227 228 229 230
					'author_name=',
					'pagename=',
					's='
					);

	var $feeds = array ( 'feed', 'rdf', 'rss', 'rss2', 'atom' );
231

232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247
	function using_permalinks() {
		if (empty($this->permalink_structure))
			return false;
		else
			return true;
	}

	function using_index_permalinks() {
		if (empty($this->permalink_structure)) {
			return false;
		}

		// If the index is not in the permalink, we're using mod_rewrite.
		if (preg_match('#^/*' . $this->index . '#', $this->permalink_structure)) {
			return true;
		}
248

249 250 251 252 253 254 255 256 257 258 259 260 261 262 263
		return false;
	}

	function using_mod_rewrite_permalinks() {
		if ( $this->using_permalinks() && ! $this->using_index_permalinks())
			return true;
		else
			return false;
	}

	function preg_index($number) {
		$match_prefix = '$';
		$match_suffix = '';

		if (! empty($this->matches)) {
264
			$match_prefix = '$' . $this->matches . '[';
265
			$match_suffix = ']';
266
		}
267

268
		return "$match_prefix$number$match_suffix";
269 270 271
	}

	function page_rewrite_rules() {
272 273
		$uris = get_option('page_uris');
		$attachment_uris = get_option('page_attachment_uris');
274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313

		$rewrite_rules = array();
		$page_structure = $this->get_page_permastruct();
		if( is_array( $attachment_uris ) ) {
			foreach ($attachment_uris as $uri => $pagename) {
				$this->add_rewrite_tag('%pagename%', "($uri)", 'attachment=');
				$rewrite_rules = array_merge($rewrite_rules, $this->generate_rewrite_rules($page_structure, EP_PAGES));
			}
		}
		if( is_array( $uris ) ) {
			foreach ($uris as $uri => $pagename) {
				$this->add_rewrite_tag('%pagename%', "($uri)", 'pagename=');
				$rewrite_rules = array_merge($rewrite_rules, $this->generate_rewrite_rules($page_structure, EP_PAGES));
			}
		}

		return $rewrite_rules;
	}

	function get_date_permastruct() {
		if (isset($this->date_structure)) {
			return $this->date_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->date_structure = '';
			return false;
		}

		// The date permalink must have year, month, and day separated by slashes.
		$endians = array('%year%/%monthnum%/%day%', '%day%/%monthnum%/%year%', '%monthnum%/%day%/%year%');

		$this->date_structure = '';
		$date_endian = '';

		foreach ($endians as $endian) {
			if (false !== strpos($this->permalink_structure, $endian)) {
				$date_endian= $endian;
				break;
			}
314
		}
315 316 317 318 319

		if ( empty($date_endian) )
			$date_endian = '%year%/%monthnum%/%day%';

		// Do not allow the date tags and %post_id% to overlap in the permalink
320
		// structure. If they do, move the date tags to $front/date/.
321 322 323 324 325 326 327 328
		$front = $this->front;
		preg_match_all('/%.+?%/', $this->permalink_structure, $tokens);
		$tok_index = 1;
		foreach ($tokens[0] as $token) {
			if ( ($token == '%post_id%') && ($tok_index <= 3) ) {
				$front = $front . 'date/';
				break;
			}
ryan's avatar
ryan committed
329
			$tok_index++;
330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
		}

		$this->date_structure = $front . $date_endian;

		return $this->date_structure;
	}

	function get_year_permastruct() {
		$structure = $this->get_date_permastruct($this->permalink_structure);

		if (empty($structure)) {
			return false;
		}

		$structure = str_replace('%monthnum%', '', $structure);
		$structure = str_replace('%day%', '', $structure);

		$structure = preg_replace('#/+#', '/', $structure);

		return $structure;
	}

	function get_month_permastruct() {
		$structure = $this->get_date_permastruct($this->permalink_structure);

		if (empty($structure)) {
			return false;
		}

		$structure = str_replace('%day%', '', $structure);

		$structure = preg_replace('#/+#', '/', $structure);

		return $structure;
	}

	function get_day_permastruct() {
		return $this->get_date_permastruct($this->permalink_structure);
	}

	function get_category_permastruct() {
		if (isset($this->category_structure)) {
			return $this->category_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->category_structure = '';
			return false;
		}

		if (empty($this->category_base))
			$this->category_structure = $this->front . 'category/';
		else
			$this->category_structure = $this->category_base . '/';

		$this->category_structure .= '%category%';

		return $this->category_structure;
	}

390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409
	function get_tag_permastruct() {
		if (isset($this->tag_structure)) {
			return $this->tag_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->tag_structure = '';
			return false;
		}

		if (empty($this->tag_base))
			$this->tag_structure = $this->front . 'tag/';
		else
			$this->tag_structure = $this->tag_base . '/';

		$this->tag_structure .= '%tag%';

		return $this->tag_structure;
	}

410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514
	function get_author_permastruct() {
		if (isset($this->author_structure)) {
			return $this->author_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->author_structure = '';
			return false;
		}

		$this->author_structure = $this->front . $this->author_base . '/%author%';

		return $this->author_structure;
	}

	function get_search_permastruct() {
		if (isset($this->search_structure)) {
			return $this->search_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->search_structure = '';
			return false;
		}

		$this->search_structure = $this->root . $this->search_base . '/%search%';

		return $this->search_structure;
	}

	function get_page_permastruct() {
		if (isset($this->page_structure)) {
			return $this->page_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->page_structure = '';
			return false;
		}

		$this->page_structure = $this->root . '%pagename%';

		return $this->page_structure;
	}

	function get_feed_permastruct() {
		if (isset($this->feed_structure)) {
			return $this->feed_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->feed_structure = '';
			return false;
		}

		$this->feed_structure = $this->root . $this->feed_base . '/%feed%';

		return $this->feed_structure;
	}

	function get_comment_feed_permastruct() {
		if (isset($this->comment_feed_structure)) {
			return $this->comment_feed_structure;
		}

		if (empty($this->permalink_structure)) {
			$this->comment_feed_structure = '';
			return false;
		}

		$this->comment_feed_structure = $this->root . $this->comments_base . '/' . $this->feed_base . '/%feed%';

		return $this->comment_feed_structure;
	}

	function add_rewrite_tag($tag, $pattern, $query) {
		// If the tag already exists, replace the existing pattern and query for
		// that tag, otherwise add the new tag, pattern, and query to the end of
		// the arrays.
		$position = array_search($tag, $this->rewritecode);
		if (FALSE !== $position && NULL !== $position) {
			$this->rewritereplace[$position] = $pattern;
			$this->queryreplace[$position] = $query;
		} else {
			$this->rewritecode[] = $tag;
			$this->rewritereplace[] = $pattern;
			$this->queryreplace[] = $query;
		}
	}

	//the main WP_Rewrite function. generate the rules from permalink structure
	function generate_rewrite_rules($permalink_structure, $ep_mask = EP_NONE, $paged = true, $feed = true, $forcomments = false, $walk_dirs = true, $endpoints = true) {
		//build a regex to match the feed section of URLs, something like (feed|atom|rss|rss2)/?
		$feedregex2 = '';
		foreach ($this->feeds as $feed_name) {
			$feedregex2 .= $feed_name . '|';
		}
		$feedregex2 = '(' . trim($feedregex2, '|') .  ')/?$';
		//$feedregex is identical but with /feed/ added on as well, so URLs like <permalink>/feed/atom
		//and <permalink>/atom are both possible
		$feedregex = $this->feed_base  . '/' . $feedregex2;

		//build a regex to match the trackback and page/xx parts of URLs
		$trackbackregex = 'trackback/?$';
		$pageregex = 'page/?([0-9]{1,})/?$';
515

516 517 518
		//build up an array of endpoint regexes to append => queries to append
		if ($endpoints) {
			$ep_query_append = array ();
519
			foreach ($this->endpoints as $endpoint) {
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
				//match everything after the endpoint name, but allow for nothing to appear there
				$epmatch = $endpoint[1] . '(/(.*))?/?$';
				//this will be appended on to the rest of the query for each dir
				$epquery = '&' . $endpoint[1] . '=';
				$ep_query_append[$epmatch] = array ( $endpoint[0], $epquery );
			}
		}

		//get everything up to the first rewrite tag
		$front = substr($permalink_structure, 0, strpos($permalink_structure, '%'));
		//build an array of the tags (note that said array ends up being in $tokens[0])
		preg_match_all('/%.+?%/', $permalink_structure, $tokens);

		$num_tokens = count($tokens[0]);

		$index = $this->index; //probably 'index.php'
		$feedindex = $index;
		$trackbackindex = $index;
		//build a list from the rewritecode and queryreplace arrays, that will look something like
		//tagname=$matches[i] where i is the current $i
		for ($i = 0; $i < $num_tokens; ++$i) {
			if (0 < $i) {
				$queries[$i] = $queries[$i - 1] . '&';
			}
544

545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580
			$query_token = str_replace($this->rewritecode, $this->queryreplace, $tokens[0][$i]) . $this->preg_index($i+1);
			$queries[$i] .= $query_token;
		}

		//get the structure, minus any cruft (stuff that isn't tags) at the front
		$structure = $permalink_structure;
		if ($front != '/') {
			$structure = str_replace($front, '', $structure);
		}
		//create a list of dirs to walk over, making rewrite rules for each level
		//so for example, a $structure of /%year%/%month%/%postname% would create
		//rewrite rules for /%year%/, /%year%/%month%/ and /%year%/%month%/%postname%
		$structure = trim($structure, '/');
		if ($walk_dirs) {
			$dirs = explode('/', $structure);
		} else {
			$dirs[] = $structure;
		}
		$num_dirs = count($dirs);

		//strip slashes from the front of $front
		$front = preg_replace('|^/+|', '', $front);

		//the main workhorse loop
		$post_rewrite = array();
		$struct = $front;
		for ($j = 0; $j < $num_dirs; ++$j) {
			//get the struct for this dir, and trim slashes off the front
			$struct .= $dirs[$j] . '/'; //accumulate. see comment near explode('/', $structure) above
			$struct = ltrim($struct, '/');
			//replace tags with regexes
			$match = str_replace($this->rewritecode, $this->rewritereplace, $struct);
			//make a list of tags, and store how many there are in $num_toks
			$num_toks = preg_match_all('/%.+?%/', $struct, $toks);
			//get the 'tagname=$matches[i]'
			$query = $queries[$num_toks - 1];
581

582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612
			//set up $ep_mask_specific which is used to match more specific URL types
			switch ($dirs[$j]) {
				case '%year%': $ep_mask_specific = EP_YEAR; break;
				case '%monthnum%': $ep_mask_specific = EP_MONTH; break;
				case '%day%': $ep_mask_specific = EP_DAY; break;
			}

			//create query for /page/xx
			$pagematch = $match . $pageregex;
			$pagequery = $index . '?' . $query . '&paged=' . $this->preg_index($num_toks + 1);

			//create query for /feed/(feed|atom|rss|rss2|rdf)
			$feedmatch = $match . $feedregex;
			$feedquery = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);

			//create query for /(feed|atom|rss|rss2|rdf) (see comment near creation of $feedregex)
			$feedmatch2 = $match . $feedregex2;
			$feedquery2 = $feedindex . '?' . $query . '&feed=' . $this->preg_index($num_toks + 1);

			//if asked to, turn the feed queries into comment feed ones
			if ($forcomments) {
				$feedquery .= '&withcomments=1';
				$feedquery2 .= '&withcomments=1';
			}

			//start creating the array of rewrites for this dir
			$rewrite = array();
			if ($feed) //...adding on /feed/ regexes => queries
				$rewrite = array($feedmatch => $feedquery, $feedmatch2 => $feedquery2);
			if ($paged) //...and /page/xx ones
				$rewrite = array_merge($rewrite, array($pagematch => $pagequery));
613

614 615 616 617 618 619 620 621 622 623
			//do endpoints
			if ($endpoints) {
				foreach ($ep_query_append as $regex => $ep) {
					//add the endpoints on if the mask fits
					if ($ep[0] & $ep_mask || $ep[0] & $ep_mask_specific) {
						$rewrite[$match . $regex] = $index . '?' . $query . $ep[1] . $this->preg_index($num_toks + 2);
					}
				}
			}

624 625 626 627
			//if we've got some tags in this dir
			if ($num_toks) {
				$post = false;
				$page = false;
628 629

				//check to see if this dir is permalink-level: i.e. the structure specifies an
630
				//individual post. Do this by checking it contains at least one of 1) post name,
631
				//2) post ID, 3) page name, 4) timestamp (year, month, day, hour, second and
632
				//minute all present). Set these flags now as we need them for the endpoints.
633 634 635
				if (strpos($struct, '%postname%') !== false || strpos($struct, '%post_id%') !== false
						|| strpos($struct, '%pagename%') !== false
						|| (strpos($struct, '%year%') !== false && strpos($struct, '%monthnum%') !== false && strpos($struct, '%day%') !== false && strpos($struct, '%hour%') !== false && strpos($struct, '%minute%') !== false && strpos($struct, '%second%') !== false)) {
636
					$post = true;
637
					if (strpos($struct, '%pagename%') !== false)
638 639
						$page = true;
				}
640

641 642 643 644 645 646 647 648 649 650
				//if we're creating rules for a permalink, do all the endpoints like attachments etc
				if ($post) {
					$post = true;
					//create query and regex for trackback
					$trackbackmatch = $match . $trackbackregex;
					$trackbackquery = $trackbackindex . '?' . $query . '&tb=1';
					//trim slashes from the end of the regex for this dir
					$match = rtrim($match, '/');
					//get rid of brackets
					$submatchbase = str_replace(array('(',')'),'',$match);
651

652 653 654 655 656 657 658
					//add a rule for at attachments, which take the form of <permalink>/some-text
					$sub1 = $submatchbase . '/([^/]+)/';
					$sub1tb = $sub1 . $trackbackregex; //add trackback regex <permalink>/trackback/...
					$sub1feed = $sub1 . $feedregex; //and <permalink>/feed/(atom|...)
					$sub1feed2 = $sub1 . $feedregex2; //and <permalink>/(feed|atom...)
					//add an ? as we don't have to match that last slash, and finally a $ so we
					//match to the end of the URL
659

660 661 662 663 664 665
					//add another rule to match attachments in the explicit form:
					//<permalink>/attachment/some-text
					$sub2 = $submatchbase . '/attachment/([^/]+)/';
					$sub2tb = $sub2 . $trackbackregex; //and add trackbacks <permalink>/attachment/trackback
					$sub2feed = $sub2 . $feedregex;    //feeds, <permalink>/attachment/feed/(atom|...)
					$sub2feed2 = $sub2 . $feedregex2;  //and feeds again on to this <permalink>/attachment/(feed|atom...)
666

667 668 669 670
					//create queries for these extra tag-ons we've just dealt with
					$subquery = $index . '?attachment=' . $this->preg_index(1);
					$subtbquery = $subquery . '&tb=1';
					$subfeedquery = $subquery . '&feed=' . $this->preg_index(2);
671

672 673 674 675 676 677 678
					//do endpoints for attachments
					if ($endpoint) { foreach ($ep_query_append as $regex => $ep) {
						if ($ep[0] & EP_ATTACHMENT) {
							$rewrite[$sub1 . $regex] = $subquery . '?' . $ep[1] . $this->preg_index(2);
							$rewrite[$sub2 . $regex] = $subquery . '?' . $ep[1] . $this->preg_index(2);
						}
					} }
679

680 681 682
					//now we've finished with endpoints, finish off the $sub1 and $sub2 matches
					$sub1 .= '?$';
					$sub2 .= '?$';
683

684 685 686 687 688 689 690 691
					//allow URLs like <permalink>/2 for <permalink>/page/2
					$match = $match . '(/[0-9]+)?/?$';
					$query = $index . '?' . $query . '&page=' . $this->preg_index($num_toks + 1);
				} else { //not matching a permalink so this is a lot simpler
					//close the match and finalise the query
					$match .= '?$';
					$query = $index . '?' . $query;
				}
692

693 694 695 696 697 698 699 700 701
				//create the final array for this dir by joining the $rewrite array (which currently
				//only contains rules/queries for trackback, pages etc) to the main regex/query for
				//this dir
				$rewrite = array_merge($rewrite, array($match => $query));

				//if we're matching a permalink, add those extras (attachments etc) on
				if ($post) {
					//add trackback
					$rewrite = array_merge(array($trackbackmatch => $trackbackquery), $rewrite);
702

703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729
					//add regexes/queries for attachments, attachment trackbacks and so on
					if ( ! $page ) //require <permalink>/attachment/stuff form for pages because of confusion with subpages
						$rewrite = array_merge($rewrite, array($sub1 => $subquery, $sub1tb => $subtbquery, $sub1feed => $subfeedquery, $sub1feed2 => $subfeedquery));
					$rewrite = array_merge($rewrite, array($sub2 => $subquery, $sub2tb => $subtbquery, $sub2feed => $subfeedquery, $sub2feed2 => $subfeedquery));
				}
			} //if($num_toks)
			//add the rules for this dir to the accumulating $post_rewrite
			$post_rewrite = array_merge($rewrite, $post_rewrite);
		} //foreach ($dir)
		return $post_rewrite; //the finished rules. phew!
	}

	function generate_rewrite_rule($permalink_structure, $walk_dirs = false) {
		return $this->generate_rewrite_rules($permalink_structure, EP_NONE, false, false, false, $walk_dirs);
	}

	/* rewrite_rules
	 * Construct rewrite matches and queries from permalink structure.
	 * Returns an associate array of matches and queries.
	 */
	function rewrite_rules() {
		$rewrite = array();

		if (empty($this->permalink_structure)) {
			return $rewrite;
		}

730 731 732
		// robots.txt
		$robots_rewrite = array('robots.txt$' => $this->index . '?robots=1');

733 734 735 736 737 738 739 740
		//Default Feed rules - These are require to allow for the direct access files to work with permalink structure starting with %category%
		$default_feeds = array(	'wp-atom.php$'	=>	$this->index .'?feed=atom',
								'wp-rdf.php$'	=>	$this->index .'?feed=rdf',
								'wp-rss.php$'	=>	$this->index .'?feed=rss',
								'wp-rss2.php$'	=>	$this->index .'?feed=rss2',
								'wp-feed.php$'	=>	$this->index .'?feed=feed',
								'wp-commentsrss2.php$'	=>	$this->index . '?feed=rss2&withcomments=1');

741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765
		// Post
		$post_rewrite = $this->generate_rewrite_rules($this->permalink_structure, EP_PERMALINK);
		$post_rewrite = apply_filters('post_rewrite_rules', $post_rewrite);

		// Date
		$date_rewrite = $this->generate_rewrite_rules($this->get_date_permastruct(), EP_DATE);
		$date_rewrite = apply_filters('date_rewrite_rules', $date_rewrite);

		// Root
		$root_rewrite = $this->generate_rewrite_rules($this->root . '/', EP_ROOT);
		$root_rewrite = apply_filters('root_rewrite_rules', $root_rewrite);

		// Comments
		$comments_rewrite = $this->generate_rewrite_rules($this->root . $this->comments_base, EP_COMMENTS, true, true, true, false);
		$comments_rewrite = apply_filters('comments_rewrite_rules', $comments_rewrite);

		// Search
		$search_structure = $this->get_search_permastruct();
		$search_rewrite = $this->generate_rewrite_rules($search_structure, EP_SEARCH);
		$search_rewrite = apply_filters('search_rewrite_rules', $search_rewrite);

		// Categories
		$category_rewrite = $this->generate_rewrite_rules($this->get_category_permastruct(), EP_CATEGORIES);
		$category_rewrite = apply_filters('category_rewrite_rules', $category_rewrite);

766 767 768 769
		// Tags
		$tag_rewrite = $this->generate_rewrite_rules($this->get_tag_permastruct(), EP_TAGS);
		$tag_rewrite = apply_filters('tag_rewrite_rules', $tag_rewrite);

770 771 772 773 774 775 776 777 778
		// Authors
		$author_rewrite = $this->generate_rewrite_rules($this->get_author_permastruct(), EP_AUTHORS);
		$author_rewrite = apply_filters('author_rewrite_rules', $author_rewrite);

		// Pages
		$page_rewrite = $this->page_rewrite_rules();
		$page_rewrite = apply_filters('page_rewrite_rules', $page_rewrite);

		// Put them together.
779
		$this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $default_feeds, $page_rewrite, $root_rewrite, $comments_rewrite, $search_rewrite, $category_rewrite, $tag_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $this->extra_rules);
780

ryan's avatar
ryan committed
781
		do_action_ref_array('generate_rewrite_rules', array(&$this));
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
		$this->rules = apply_filters('rewrite_rules_array', $this->rules);

		return $this->rules;
	}

	function wp_rewrite_rules() {
		$this->rules = get_option('rewrite_rules');
		if ( empty($this->rules) ) {
			$this->matches = 'matches';
			$this->rewrite_rules();
			update_option('rewrite_rules', $this->rules);
		}

		return $this->rules;
	}

	function mod_rewrite_rules() {
		if ( ! $this->using_permalinks()) {
			return '';
		}

803
		$site_root = parse_url(get_option('siteurl'));
804 805
		$site_root = trailingslashit($site_root['path']);

806
		$home_root = parse_url(get_option('home'));
807
		$home_root = trailingslashit($home_root['path']);
808

809 810 811
		$rules = "<IfModule mod_rewrite.c>\n";
		$rules .= "RewriteEngine On\n";
		$rules .= "RewriteBase $home_root\n";
812

813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
		//add in the rules that don't redirect to WP's index.php (and thus shouldn't be handled by WP at all)
		foreach ($this->non_wp_rules as $match => $query) {
			// Apache 1.3 does not support the reluctant (non-greedy) modifier.
			$match = str_replace('.+?', '.+', $match);

			// If the match is unanchored and greedy, prepend rewrite conditions
			// to avoid infinite redirects and eclipsing of real files.
			if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
				//nada.
			}

			$rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
		}

		if ($this->use_verbose_rules) {
			$this->matches = '';
			$rewrite = $this->rewrite_rules();
			$num_rules = count($rewrite);
			$rules .= "RewriteCond %{REQUEST_FILENAME} -f [OR]\n" .
				"RewriteCond %{REQUEST_FILENAME} -d\n" .
				"RewriteRule ^.*$ - [S=$num_rules]\n";

			foreach ($rewrite as $match => $query) {
				// Apache 1.3 does not support the reluctant (non-greedy) modifier.
				$match = str_replace('.+?', '.+', $match);

				// If the match is unanchored and greedy, prepend rewrite conditions
				// to avoid infinite redirects and eclipsing of real files.
				if ($match == '(.+)/?$' || $match == '([^/]+)/?$' ) {
					//nada.
				}

845
				if (strpos($query, $this->index) !== false) {
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863
					$rules .= 'RewriteRule ^' . $match . ' ' . $home_root . $query . " [QSA,L]\n";
				} else {
					$rules .= 'RewriteRule ^' . $match . ' ' . $site_root . $query . " [QSA,L]\n";
				}
			}
		} else {
			$rules .= "RewriteCond %{REQUEST_FILENAME} !-f\n" .
				"RewriteCond %{REQUEST_FILENAME} !-d\n" .
				"RewriteRule . {$home_root}{$this->index} [L]\n";
		}

		$rules .= "</IfModule>\n";

		$rules = apply_filters('mod_rewrite_rules', $rules);
		$rules = apply_filters('rewrite_rules', $rules);  // Deprecated

		return $rules;
	}
864

865
	//Add a straight rewrite rule
866
	function add_rule($regex, $redirect, $after = 'bottom') {
867 868 869 870 871 872
		//get everything up to the first ?
		$index = (strpos($redirect, '?') == false ? strlen($redirect) : strpos($redirect, '?'));
		$front = substr($redirect, 0, $index);
		if ($front != $this->index) { //it doesn't redirect to WP's index.php
			$this->add_external_rule($regex, $redirect);
		} else {
873 874 875 876 877
			if ( 'bottom' == $after)
				$this->extra_rules = array_merge($this->extra_rules, array($regex => $redirect));
			else
				$this->extra_rules_top = array_merge($this->extra_rules_top, array($regex => $redirect));
			//$this->extra_rules[$regex] = $redirect;
878 879
		}
	}
880

881 882 883 884
	//add a rule that doesn't redirect to index.php
	function add_external_rule($regex, $redirect) {
		$this->non_wp_rules[$regex] = $redirect;
	}
885

886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902
	//add an endpoint, like /trackback/, to be inserted after certain URL types (specified in $places)
	function add_endpoint($name, $places) {
		global $wp;
		$this->endpoints[] = array ( $places, $name );
		$wp->add_query_var($name);
	}

	function flush_rules() {
		generate_page_uri_index();
		delete_option('rewrite_rules');
		$this->wp_rewrite_rules();
		if ( function_exists('save_mod_rewrite_rules') )
			save_mod_rewrite_rules();
	}

	function init() {
		$this->extra_rules = $this->non_wp_rules = $this->endpoints = array();
903
		$this->permalink_structure = get_option('permalink_structure');
904 905 906 907 908
		$this->front = substr($this->permalink_structure, 0, strpos($this->permalink_structure, '%'));
		$this->root = '';
		if ($this->using_index_permalinks()) {
			$this->root = $this->index . '/';
		}
909 910
		$this->category_base = get_option( 'category_base' );
		$this->tag_base = get_option( 'tag_base' );
911 912 913 914 915 916 917
		unset($this->category_structure);
		unset($this->author_structure);
		unset($this->date_structure);
		unset($this->page_structure);
		unset($this->search_structure);
		unset($this->feed_structure);
		unset($this->comment_feed_structure);
918
		$this->use_trailing_slashes = ( substr($this->permalink_structure, -1, 1) == '/' ) ? true : false;
919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
	}

	function set_permalink_structure($permalink_structure) {
		if ($permalink_structure != $this->permalink_structure) {
			update_option('permalink_structure', $permalink_structure);
			$this->init();
		}
	}

	function set_category_base($category_base) {
		if ($category_base != $this->category_base) {
			update_option('category_base', $category_base);
			$this->init();
		}
	}

935 936 937 938 939 940 941
	function set_tag_base( $tag_base ) {
		if ( $tag_base != $this->tag_base ) {
			update_option( 'tag_base', $tag_base );
			$this->init();
		}
	}

942 943 944 945 946
	function WP_Rewrite() {
		$this->init();
	}
}

947
?>