1<?php 2/** 3 * DokuWiki fulltextsearch functions using the index 4 * 5 * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) 6 * @author Andreas Gohr <andi@splitbrain.org> 7 */ 8 9if(!defined('DOKU_INC')) die('meh.'); 10 11/** 12 * create snippets for the first few results only 13 */ 14if(!defined('FT_SNIPPET_NUMBER')) define('FT_SNIPPET_NUMBER',15); 15 16/** 17 * The fulltext search 18 * 19 * Returns a list of matching documents for the given query 20 * 21 * refactored into ft_pageSearch(), _ft_pageSearch() and trigger_event() 22 * 23 */ 24function ft_pageSearch($query,&$highlight){ 25 26 $data['query'] = $query; 27 $data['highlight'] =& $highlight; 28 29 return trigger_event('SEARCH_QUERY_FULLPAGE', $data, '_ft_pageSearch'); 30} 31 32/** 33 * Returns a list of matching documents for the given query 34 * 35 * @author Andreas Gohr <andi@splitbrain.org> 36 * @author Kazutaka Miyasaka <kazmiya@gmail.com> 37 */ 38function _ft_pageSearch(&$data) { 39 // parse the given query 40 $q = ft_queryParser($data['query']); 41 $data['highlight'] = $q['highlight']; 42 43 if (empty($q['parsed_ary'])) return array(); 44 45 // lookup all words found in the query 46 $lookup = idx_lookup($q['words']); 47 48 // get all pages in this dokuwiki site (!: includes nonexistent pages) 49 $pages_all = array(); 50 foreach (idx_getIndex('page', '') as $id) { 51 $pages_all[trim($id)] = 0; // base: 0 hit 52 } 53 54 // process the query 55 $stack = array(); 56 foreach ($q['parsed_ary'] as $token) { 57 switch (substr($token, 0, 3)) { 58 case 'W+:': 59 case 'W-:': 60 case 'W_:': // word 61 $word = substr($token, 3); 62 $stack[] = (array) $lookup[$word]; 63 break; 64 case 'P+:': 65 case 'P-:': // phrase 66 $phrase = substr($token, 3); 67 // since phrases are always parsed as ((W1)(W2)...(P)), 68 // the end($stack) always points the pages that contain 69 // all words in this phrase 70 $pages = end($stack); 71 $pages_matched = array(); 72 foreach(array_keys($pages) as $id){ 73 $text = utf8_strtolower(rawWiki($id)); 74 if (strpos($text, $phrase) !== false) { 75 $pages_matched[$id] = 0; // phrase: always 0 hit 76 } 77 } 78 $stack[] = $pages_matched; 79 break; 80 case 'N+:': 81 case 'N-:': // namespace 82 $ns = substr($token, 3); 83 $pages_matched = array(); 84 foreach (array_keys($pages_all) as $id) { 85 if (strpos($id, $ns) === 0) { 86 $pages_matched[$id] = 0; // namespace: always 0 hit 87 } 88 } 89 $stack[] = $pages_matched; 90 break; 91 case 'AND': // and operation 92 list($pages1, $pages2) = array_splice($stack, -2); 93 $stack[] = ft_resultCombine(array($pages1, $pages2)); 94 break; 95 case 'OR': // or operation 96 list($pages1, $pages2) = array_splice($stack, -2); 97 $stack[] = ft_resultUnite(array($pages1, $pages2)); 98 break; 99 case 'NOT': // not operation (unary) 100 $pages = array_pop($stack); 101 $stack[] = ft_resultComplement(array($pages_all, $pages)); 102 break; 103 } 104 } 105 $docs = array_pop($stack); 106 107 if (empty($docs)) return array(); 108 109 // check: settings, acls, existence 110 foreach (array_keys($docs) as $id) { 111 if (isHiddenPage($id) || auth_quickaclcheck($id) < AUTH_READ || !page_exists($id, '', false)) { 112 unset($docs[$id]); 113 } 114 } 115 116 // sort docs by count 117 arsort($docs); 118 119 return $docs; 120} 121 122/** 123 * Returns the backlinks for a given page 124 * 125 * Does a quick lookup with the fulltext index, then 126 * evaluates the instructions of the found pages 127 */ 128function ft_backlinks($id){ 129 global $conf; 130 $swfile = DOKU_INC.'inc/lang/'.$conf['lang'].'/stopwords.txt'; 131 $stopwords = @file_exists($swfile) ? file($swfile) : array(); 132 133 $result = array(); 134 135 // quick lookup of the pagename 136 $page = noNS($id); 137 $matches = idx_lookup(idx_tokenizer($page,$stopwords)); // pagename may contain specials (_ or .) 138 $docs = array_keys(ft_resultCombine(array_values($matches))); 139 $docs = array_filter($docs,'isVisiblePage'); // discard hidden pages 140 if(!count($docs)) return $result; 141 142 // check metadata for matching links 143 foreach($docs as $match){ 144 // metadata relation reference links are already resolved 145 $links = p_get_metadata($match,'relation references',false); 146 if (isset($links[$id])) $result[] = $match; 147 } 148 149 if(!count($result)) return $result; 150 151 // check ACL permissions 152 foreach(array_keys($result) as $idx){ 153 if(auth_quickaclcheck($result[$idx]) < AUTH_READ){ 154 unset($result[$idx]); 155 } 156 } 157 158 sort($result); 159 return $result; 160} 161 162/** 163 * Returns the pages that use a given media file 164 * 165 * Does a quick lookup with the fulltext index, then 166 * evaluates the instructions of the found pages 167 * 168 * Aborts after $max found results 169 */ 170function ft_mediause($id,$max){ 171 global $conf; 172 $swfile = DOKU_INC.'inc/lang/'.$conf['lang'].'/stopwords.txt'; 173 $stopwords = @file_exists($swfile) ? file($swfile) : array(); 174 175 if(!$max) $max = 1; // need to find at least one 176 177 $result = array(); 178 179 // quick lookup of the mediafile 180 $media = noNS($id); 181 $matches = idx_lookup(idx_tokenizer($media,$stopwords)); 182 $docs = array_keys(ft_resultCombine(array_values($matches))); 183 if(!count($docs)) return $result; 184 185 // go through all found pages 186 $found = 0; 187 $pcre = preg_quote($media,'/'); 188 foreach($docs as $doc){ 189 $ns = getNS($doc); 190 preg_match_all('/\{\{([^|}]*'.$pcre.'[^|}]*)(|[^}]+)?\}\}/i',rawWiki($doc),$matches); 191 foreach($matches[1] as $img){ 192 $img = trim($img); 193 if(preg_match('/^https?:\/\//i',$img)) continue; // skip external images 194 list($img) = explode('?',$img); // remove any parameters 195 resolve_mediaid($ns,$img,$exists); // resolve the possibly relative img 196 197 if($img == $id){ // we have a match 198 $result[] = $doc; 199 $found++; 200 break; 201 } 202 } 203 if($found >= $max) break; 204 } 205 206 sort($result); 207 return $result; 208} 209 210 211 212/** 213 * Quicksearch for pagenames 214 * 215 * By default it only matches the pagename and ignores the 216 * namespace. This can be changed with the second parameter. 217 * The third parameter allows to search in titles as well. 218 * 219 * The function always returns titles as well 220 * 221 * @triggers SEARCH_QUERY_PAGELOOKUP 222 * @author Andreas Gohr <andi@splitbrain.org> 223 * @author Adrian Lang <lang@cosmocode.de> 224 */ 225function ft_pageLookup($id, $in_ns=false, $in_title=false){ 226 $data = compact('id', 'in_ns', 'in_title'); 227 $data['has_titles'] = true; // for plugin backward compatibility check 228 return trigger_event('SEARCH_QUERY_PAGELOOKUP', $data, '_ft_pageLookup'); 229} 230 231function _ft_pageLookup(&$data){ 232 global $conf; 233 // split out original parameters 234 $id = $data['id']; 235 if (preg_match('/(?:^| )@(\w+)/', $id, $matches)) { 236 $ns = cleanID($matches[1]) . ':'; 237 $id = str_replace($matches[0], '', $id); 238 } 239 240 $in_ns = $data['in_ns']; 241 $in_title = $data['in_title']; 242 243 $pages = array_map('rtrim', idx_getIndex('page', '')); 244 $titles = array_map('rtrim', idx_getIndex('title', '')); 245 // check for corrupt title index #FS2076 246 if(count($pages) != count($titles)){ 247 $titles = array_fill(0,count($pages),''); 248 @unlink($conf['indexdir'].'/title.idx'); // will be rebuilt in inc/init.php 249 } 250 $pages = array_combine($pages, $titles); 251 252 $cleaned = cleanID($id); 253 if ($id !== '' && $cleaned !== '') { 254 foreach ($pages as $p_id => $p_title) { 255 if ((strpos($in_ns ? $p_id : noNSorNS($p_id), $cleaned) === false) && 256 (!$in_title || (stripos($p_title, $id) === false)) ) { 257 unset($pages[$p_id]); 258 } 259 } 260 } 261 if (isset($ns)) { 262 foreach (array_keys($pages) as $p_id) { 263 if (strpos($p_id, $ns) !== 0) { 264 unset($pages[$p_id]); 265 } 266 } 267 } 268 269 // discard hidden pages 270 // discard nonexistent pages 271 // check ACL permissions 272 foreach(array_keys($pages) as $idx){ 273 if(!isVisiblePage($idx) || !page_exists($idx) || 274 auth_quickaclcheck($idx) < AUTH_READ) { 275 unset($pages[$idx]); 276 } 277 } 278 279 uksort($pages,'ft_pagesorter'); 280 return $pages; 281} 282 283/** 284 * Sort pages based on their namespace level first, then on their string 285 * values. This makes higher hierarchy pages rank higher than lower hierarchy 286 * pages. 287 */ 288function ft_pagesorter($a, $b){ 289 $ac = count(explode(':',$a)); 290 $bc = count(explode(':',$b)); 291 if($ac < $bc){ 292 return -1; 293 }elseif($ac > $bc){ 294 return 1; 295 } 296 return strcmp ($a,$b); 297} 298 299/** 300 * Creates a snippet extract 301 * 302 * @author Andreas Gohr <andi@splitbrain.org> 303 * @triggers FULLTEXT_SNIPPET_CREATE 304 */ 305function ft_snippet($id,$highlight){ 306 $text = rawWiki($id); 307 $text = str_replace("\xC2\xAD",'',$text); // remove soft-hyphens 308 $evdata = array( 309 'id' => $id, 310 'text' => &$text, 311 'highlight' => &$highlight, 312 'snippet' => '', 313 ); 314 315 $evt = new Doku_Event('FULLTEXT_SNIPPET_CREATE',$evdata); 316 if ($evt->advise_before()) { 317 $match = array(); 318 $snippets = array(); 319 $utf8_offset = $offset = $end = 0; 320 $len = utf8_strlen($text); 321 322 // build a regexp from the phrases to highlight 323 $re1 = '('.join('|',array_map('ft_snippet_re_preprocess', array_map('preg_quote_cb',array_filter((array) $highlight)))).')'; 324 $re2 = "$re1.{0,75}(?!\\1)$re1"; 325 $re3 = "$re1.{0,45}(?!\\1)$re1.{0,45}(?!\\1)(?!\\2)$re1"; 326 327 for ($cnt=4; $cnt--;) { 328 if (0) { 329 } else if (preg_match('/'.$re3.'/iu',$text,$match,PREG_OFFSET_CAPTURE,$offset)) { 330 } else if (preg_match('/'.$re2.'/iu',$text,$match,PREG_OFFSET_CAPTURE,$offset)) { 331 } else if (preg_match('/'.$re1.'/iu',$text,$match,PREG_OFFSET_CAPTURE,$offset)) { 332 } else { 333 break; 334 } 335 336 list($str,$idx) = $match[0]; 337 338 // convert $idx (a byte offset) into a utf8 character offset 339 $utf8_idx = utf8_strlen(substr($text,0,$idx)); 340 $utf8_len = utf8_strlen($str); 341 342 // establish context, 100 bytes surrounding the match string 343 // first look to see if we can go 100 either side, 344 // then drop to 50 adding any excess if the other side can't go to 50, 345 $pre = min($utf8_idx-$utf8_offset,100); 346 $post = min($len-$utf8_idx-$utf8_len,100); 347 348 if ($pre>50 && $post>50) { 349 $pre = $post = 50; 350 } else if ($pre>50) { 351 $pre = min($pre,100-$post); 352 } else if ($post>50) { 353 $post = min($post, 100-$pre); 354 } else { 355 // both are less than 50, means the context is the whole string 356 // make it so and break out of this loop - there is no need for the 357 // complex snippet calculations 358 $snippets = array($text); 359 break; 360 } 361 362 // establish context start and end points, try to append to previous 363 // context if possible 364 $start = $utf8_idx - $pre; 365 $append = ($start < $end) ? $end : false; // still the end of the previous context snippet 366 $end = $utf8_idx + $utf8_len + $post; // now set it to the end of this context 367 368 if ($append) { 369 $snippets[count($snippets)-1] .= utf8_substr($text,$append,$end-$append); 370 } else { 371 $snippets[] = utf8_substr($text,$start,$end-$start); 372 } 373 374 // set $offset for next match attempt 375 // substract strlen to avoid splitting a potential search success, 376 // this is an approximation as the search pattern may match strings 377 // of varying length and it will fail if the context snippet 378 // boundary breaks a matching string longer than the current match 379 $utf8_offset = $utf8_idx + $post; 380 $offset = $idx + strlen(utf8_substr($text,$utf8_idx,$post)); 381 $offset = utf8_correctIdx($text,$offset); 382 } 383 384 $m = "\1"; 385 $snippets = preg_replace('/'.$re1.'/iu',$m.'$1'.$m,$snippets); 386 $snippet = preg_replace('/'.$m.'([^'.$m.']*?)'.$m.'/iu','<strong class="search_hit">$1</strong>',hsc(join('... ',$snippets))); 387 388 $evdata['snippet'] = $snippet; 389 } 390 $evt->advise_after(); 391 unset($evt); 392 393 return $evdata['snippet']; 394} 395 396/** 397 * Wraps a search term in regex boundary checks. 398 */ 399function ft_snippet_re_preprocess($term) { 400 // do not process asian terms where word boundaries are not explicit 401 if(preg_match('/'.IDX_ASIAN.'/u',$term)){ 402 return $term; 403 } 404 405 if(substr($term,0,2) == '\\*'){ 406 $term = substr($term,2); 407 }else{ 408 $term = '\b'.$term; 409 } 410 411 if(substr($term,-2,2) == '\\*'){ 412 $term = substr($term,0,-2); 413 }else{ 414 $term = $term.'\b'; 415 } 416 return $term; 417} 418 419/** 420 * Combine found documents and sum up their scores 421 * 422 * This function is used to combine searched words with a logical 423 * AND. Only documents available in all arrays are returned. 424 * 425 * based upon PEAR's PHP_Compat function for array_intersect_key() 426 * 427 * @param array $args An array of page arrays 428 */ 429function ft_resultCombine($args){ 430 $array_count = count($args); 431 if($array_count == 1){ 432 return $args[0]; 433 } 434 435 $result = array(); 436 if ($array_count > 1) { 437 foreach ($args[0] as $key => $value) { 438 $result[$key] = $value; 439 for ($i = 1; $i !== $array_count; $i++) { 440 if (!isset($args[$i][$key])) { 441 unset($result[$key]); 442 break; 443 } 444 $result[$key] += $args[$i][$key]; 445 } 446 } 447 } 448 return $result; 449} 450 451/** 452 * Unites found documents and sum up their scores 453 * 454 * based upon ft_resultCombine() function 455 * 456 * @param array $args An array of page arrays 457 * @author Kazutaka Miyasaka <kazmiya@gmail.com> 458 */ 459function ft_resultUnite($args) { 460 $array_count = count($args); 461 if ($array_count === 1) { 462 return $args[0]; 463 } 464 465 $result = $args[0]; 466 for ($i = 1; $i !== $array_count; $i++) { 467 foreach (array_keys($args[$i]) as $id) { 468 $result[$id] += $args[$i][$id]; 469 } 470 } 471 return $result; 472} 473 474/** 475 * Computes the difference of documents using page id for comparison 476 * 477 * nearly identical to PHP5's array_diff_key() 478 * 479 * @param array $args An array of page arrays 480 * @author Kazutaka Miyasaka <kazmiya@gmail.com> 481 */ 482function ft_resultComplement($args) { 483 $array_count = count($args); 484 if ($array_count === 1) { 485 return $args[0]; 486 } 487 488 $result = $args[0]; 489 foreach (array_keys($result) as $id) { 490 for ($i = 1; $i !== $array_count; $i++) { 491 if (isset($args[$i][$id])) unset($result[$id]); 492 } 493 } 494 return $result; 495} 496 497/** 498 * Parses a search query and builds an array of search formulas 499 * 500 * @author Andreas Gohr <andi@splitbrain.org> 501 * @author Kazutaka Miyasaka <kazmiya@gmail.com> 502 */ 503function ft_queryParser($query){ 504 global $conf; 505 $swfile = DOKU_INC.'inc/lang/'.$conf['lang'].'/stopwords.txt'; 506 $stopwords = @file_exists($swfile) ? file($swfile) : array(); 507 508 /** 509 * parse a search query and transform it into intermediate representation 510 * 511 * in a search query, you can use the following expressions: 512 * 513 * words: 514 * include 515 * -exclude 516 * phrases: 517 * "phrase to be included" 518 * -"phrase you want to exclude" 519 * namespaces: 520 * @include:namespace (or ns:include:namespace) 521 * ^exclude:namespace (or -ns:exclude:namespace) 522 * groups: 523 * () 524 * -() 525 * operators: 526 * and ('and' is the default operator: you can always omit this) 527 * or (or pipe symbol '|', lower precedence than 'and') 528 * 529 * e.g. a query [ aa "bb cc" @dd:ee ] means "search pages which contain 530 * a word 'aa', a phrase 'bb cc' and are within a namespace 'dd:ee'". 531 * this query is equivalent to [ -(-aa or -"bb cc" or -ns:dd:ee) ] 532 * as long as you don't mind hit counts. 533 * 534 * intermediate representation consists of the following parts: 535 * 536 * ( ) - group 537 * AND - logical and 538 * OR - logical or 539 * NOT - logical not 540 * W+:, W-:, W_: - word (underscore: no need to highlight) 541 * P+:, P-: - phrase (minus sign: logically in NOT group) 542 * N+:, N-: - namespace 543 */ 544 $parsed_query = ''; 545 $parens_level = 0; 546 $terms = preg_split('/(-?".*?")/u', utf8_strtolower($query), -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); 547 548 foreach ($terms as $term) { 549 $parsed = ''; 550 if (preg_match('/^(-?)"(.+)"$/u', $term, $matches)) { 551 // phrase-include and phrase-exclude 552 $not = $matches[1] ? 'NOT' : ''; 553 $parsed = $not.ft_termParser($matches[2], $stopwords, false, true); 554 } else { 555 // fix incomplete phrase 556 $term = str_replace('"', ' ', $term); 557 558 // fix parentheses 559 $term = str_replace(')' , ' ) ', $term); 560 $term = str_replace('(' , ' ( ', $term); 561 $term = str_replace('- (', ' -(', $term); 562 563 // treat pipe symbols as 'OR' operators 564 $term = str_replace('|', ' or ', $term); 565 566 // treat ideographic spaces (U+3000) as search term separators 567 // FIXME: some more separators? 568 $term = preg_replace('/[ \x{3000}]+/u', ' ', $term); 569 $term = trim($term); 570 if ($term === '') continue; 571 572 $tokens = explode(' ', $term); 573 foreach ($tokens as $token) { 574 if ($token === '(') { 575 // parenthesis-include-open 576 $parsed .= '('; 577 ++$parens_level; 578 } elseif ($token === '-(') { 579 // parenthesis-exclude-open 580 $parsed .= 'NOT('; 581 ++$parens_level; 582 } elseif ($token === ')') { 583 // parenthesis-any-close 584 if ($parens_level === 0) continue; 585 $parsed .= ')'; 586 $parens_level--; 587 } elseif ($token === 'and') { 588 // logical-and (do nothing) 589 } elseif ($token === 'or') { 590 // logical-or 591 $parsed .= 'OR'; 592 } elseif (preg_match('/^(?:\^|-ns:)(.+)$/u', $token, $matches)) { 593 // namespace-exclude 594 $parsed .= 'NOT(N+:'.$matches[1].')'; 595 } elseif (preg_match('/^(?:@|ns:)(.+)$/u', $token, $matches)) { 596 // namespace-include 597 $parsed .= '(N+:'.$matches[1].')'; 598 } elseif (preg_match('/^-(.+)$/', $token, $matches)) { 599 // word-exclude 600 $parsed .= 'NOT('.ft_termParser($matches[1], $stopwords).')'; 601 } else { 602 // word-include 603 $parsed .= ft_termParser($token, $stopwords); 604 } 605 } 606 } 607 $parsed_query .= $parsed; 608 } 609 610 // cleanup (very sensitive) 611 $parsed_query .= str_repeat(')', $parens_level); 612 do { 613 $parsed_query_old = $parsed_query; 614 $parsed_query = preg_replace('/(NOT)?\(\)/u', '', $parsed_query); 615 } while ($parsed_query !== $parsed_query_old); 616 $parsed_query = preg_replace('/(NOT|OR)+\)/u', ')' , $parsed_query); 617 $parsed_query = preg_replace('/(OR)+/u' , 'OR' , $parsed_query); 618 $parsed_query = preg_replace('/\(OR/u' , '(' , $parsed_query); 619 $parsed_query = preg_replace('/^OR|OR$/u' , '' , $parsed_query); 620 $parsed_query = preg_replace('/\)(NOT)?\(/u' , ')AND$1(', $parsed_query); 621 622 // adjustment: make highlightings right 623 $parens_level = 0; 624 $notgrp_levels = array(); 625 $parsed_query_new = ''; 626 $tokens = preg_split('/(NOT\(|[()])/u', $parsed_query, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); 627 foreach ($tokens as $token) { 628 if ($token === 'NOT(') { 629 $notgrp_levels[] = ++$parens_level; 630 } elseif ($token === '(') { 631 ++$parens_level; 632 } elseif ($token === ')') { 633 if ($parens_level-- === end($notgrp_levels)) array_pop($notgrp_levels); 634 } elseif (count($notgrp_levels) % 2 === 1) { 635 // turn highlight-flag off if terms are logically in "NOT" group 636 $token = preg_replace('/([WPN])\+\:/u', '$1-:', $token); 637 } 638 $parsed_query_new .= $token; 639 } 640 $parsed_query = $parsed_query_new; 641 642 /** 643 * convert infix notation string into postfix (Reverse Polish notation) array 644 * by Shunting-yard algorithm 645 * 646 * see: http://en.wikipedia.org/wiki/Reverse_Polish_notation 647 * see: http://en.wikipedia.org/wiki/Shunting-yard_algorithm 648 */ 649 $parsed_ary = array(); 650 $ope_stack = array(); 651 $ope_precedence = array(')' => 1, 'OR' => 2, 'AND' => 3, 'NOT' => 4, '(' => 5); 652 $ope_regex = '/([()]|OR|AND|NOT)/u'; 653 654 $tokens = preg_split($ope_regex, $parsed_query, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); 655 foreach ($tokens as $token) { 656 if (preg_match($ope_regex, $token)) { 657 // operator 658 $last_ope = end($ope_stack); 659 while ($ope_precedence[$token] <= $ope_precedence[$last_ope] && $last_ope != '(') { 660 $parsed_ary[] = array_pop($ope_stack); 661 $last_ope = end($ope_stack); 662 } 663 if ($token == ')') { 664 array_pop($ope_stack); // this array_pop always deletes '(' 665 } else { 666 $ope_stack[] = $token; 667 } 668 } else { 669 // operand 670 $token_decoded = str_replace(array('OP', 'CP'), array('(', ')'), $token); 671 $parsed_ary[] = $token_decoded; 672 } 673 } 674 $parsed_ary = array_values(array_merge($parsed_ary, array_reverse($ope_stack))); 675 676 // cleanup: each double "NOT" in RPN array actually does nothing 677 $parsed_ary_count = count($parsed_ary); 678 for ($i = 1; $i < $parsed_ary_count; ++$i) { 679 if ($parsed_ary[$i] === 'NOT' && $parsed_ary[$i - 1] === 'NOT') { 680 unset($parsed_ary[$i], $parsed_ary[$i - 1]); 681 } 682 } 683 $parsed_ary = array_values($parsed_ary); 684 685 // build return value 686 $q = array(); 687 $q['query'] = $query; 688 $q['parsed_str'] = $parsed_query; 689 $q['parsed_ary'] = $parsed_ary; 690 691 foreach ($q['parsed_ary'] as $token) { 692 if ($token[2] !== ':') continue; 693 $body = substr($token, 3); 694 695 switch (substr($token, 0, 3)) { 696 case 'N+:': 697 $q['ns'][] = $body; // for backward compatibility 698 break; 699 case 'N-:': 700 $q['notns'][] = $body; // for backward compatibility 701 break; 702 case 'W_:': 703 $q['words'][] = $body; 704 break; 705 case 'W-:': 706 $q['words'][] = $body; 707 $q['not'][] = $body; // for backward compatibility 708 break; 709 case 'W+:': 710 $q['words'][] = $body; 711 $q['highlight'][] = $body; 712 $q['and'][] = $body; // for backward compatibility 713 break; 714 case 'P-:': 715 $q['phrases'][] = $body; 716 break; 717 case 'P+:': 718 $q['phrases'][] = $body; 719 $q['highlight'][] = $body; 720 break; 721 } 722 } 723 foreach (array('words', 'phrases', 'highlight', 'ns', 'notns', 'and', 'not') as $key) { 724 $q[$key] = empty($q[$key]) ? array() : array_values(array_unique($q[$key])); 725 } 726 727 return $q; 728} 729 730/** 731 * Transforms given search term into intermediate representation 732 * 733 * This function is used in ft_queryParser() and not for general purpose use. 734 * 735 * @author Kazutaka Miyasaka <kazmiya@gmail.com> 736 */ 737function ft_termParser($term, &$stopwords, $consider_asian = true, $phrase_mode = false) { 738 $parsed = ''; 739 if ($consider_asian) { 740 // successive asian characters need to be searched as a phrase 741 $words = preg_split('/('.IDX_ASIAN.'+)/u', $term, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); 742 foreach ($words as $word) { 743 $phrase_mode = $phrase_mode ? true : preg_match('/'.IDX_ASIAN.'/u', $word); 744 $parsed .= ft_termParser($word, $stopwords, false, $phrase_mode); 745 } 746 } else { 747 $term_noparen = str_replace(array('(', ')'), ' ', $term); 748 $words = idx_tokenizer($term_noparen, $stopwords, true); 749 750 // W_: no need to highlight 751 if (empty($words)) { 752 $parsed = '()'; // important: do not remove 753 } elseif ($words[0] === $term) { 754 $parsed = '(W+:'.$words[0].')'; 755 } elseif ($phrase_mode) { 756 $term_encoded = str_replace(array('(', ')'), array('OP', 'CP'), $term); 757 $parsed = '((W_:'.implode(')(W_:', $words).')(P+:'.$term_encoded.'))'; 758 } else { 759 $parsed = '((W+:'.implode(')(W+:', $words).'))'; 760 } 761 } 762 return $parsed; 763} 764 765//Setup VIM: ex: et ts=4 : 766