drn1008 2018-06-03 07:08
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Preg_Replace(删除)精确匹配单词PHP的数组

I have an array of stopwords set into an array

$stopwords = array(
    "a ",
    "about ",
    "above ",
    "above ",
    "across ",
    "after ",
    "afterwards ",
    "again ",
    "against ",
    "all ",
    "almost ",
    "alone ",
    "along ",
    "already ",
    "also ",
    "although ",
    "always ",
    "am ",
    "among ",
    "amongst ",
    "amoungst ",
    "amount ",
    "an ",
    "and ",
    "another ",
    "any ",
    "anyhow ",
    "anyone ",
    "anything ",
    "anyway ",
    "anywhere ",
    "are ",
    "around ",
    "as ",
    "at ",
    "back ",
    "be ",
    "became ",
    "because ",
    "become ",
    "becomes ",
    "becoming ",
    "been ",
    "before ",
    "beforehand ",
    "behind ",
    "being ",
    "below ",
    "beside ",
    "besides ",
    "between ",
    "beyond ",
    "bill ",
    "both ",
    "bottom ",
    "but ",
    "by ",
    "can ",
    "cannot ",
    "cant ",
    "co ",
    "con ",
    "could ",
    "couldnt ",
    "cry ",
    "considered ",
    "describe ",
    "detail ",
    "do ",
    "did ",
    "done ",
    "down ",
    "due ",
    "during ",
    "each ",
    "eg ",
    "eight ",
    "either ",
    "eleven ",
    "else ",
    "elsewhere ",
    "empty ",
    "enough ",
    "etc ",
    "even ",
    "ever ",
    "every ",
    "everyone ",
    "everything ",
    "everywhere ",
    "except ",
    "few ",
    "fifteen ",
    "fify ",
    "fill ",
    "find ",
    "fire ",
    "five ",
    "for ",
    "former ",
    "formerly ",
    "forty ",
    "found ",
    "four ",
    "from ",
    "front ",
    "full ",
    "further ",
    "get ",
    "give ",
    "go ",
    "had ",
//    "has ",
    "hasnt ",
    "have ",
    "he ",
    "hence ",
    "her ",
    "here ",
    "hereafter ",
    "hereby ",
    "herein ",
    "hereupon ",
    "hers ",
    "herself ",
    "him ",
    "himself ",
    "his ",
    "how ",
    "however ",
    "hundred ",
    "ie ",
    "if ",
    "In",
    "inc ",
    "indeed ",
    "interest ",
    "into ",
    "is ",
    "it ",
    "its ",
    "itself ",
    "keep ",
    "known ",
//    "last ",
    "latter ",
    "latterly ",
    "least ",
    "legend ",
    "less ",
    "ltd ",
//    "made ",
    "many ",
    "may ",
    "me ",
    "meanwhile ",
    "might ",
    "mill ",
    "mine ",
    "more ",
    "moreover ",
//    "most ",
    "mostly ",
    "move ",
    "much ",
    "must ",
    "my ",
    "myself ",
    "name ",
    "namely ",
    "neither ",
    "never ",
    "nevertheless ",
    "next ",
    "nine ",
    "no ",
    "nobody ",
    "none ",
    "noone ",
    "nor ",
    "nothing ",
    "now ",
    "nowhere ",
    "of ",
    "off ",
    "often ",
    "on ",
    "once ",
    "one ",
    "only ",
    "onto ",
    "or ",
    "other ",
    "others ",
    "otherwise ",
    "our ",
    "ours ",
    "ourselves ",
    "out ",
//    "over ",
    "own ",
    "part ",
    "per ",
    "perhaps ",
    "please ",
    "popular ",
    "put ",
    "rather ",
    "re ",
    "same ",
    "see ",
    "seem ",
    "seemed ",
    "seeming ",
    "seems ",
    "serious ",
    "several ",
    "she ",
    "should ",
    "show ",
    "since ",
    "sincere ",
    "six ",
    "sixty ",
    "so ",
    "some ",
    "somehow ",
    "someone ",
    "something ",
    "sometime ",
    "sometimes ",
    "somewhere ",
    "still ",
    "such ",
    "take ",
    "technique ",
    "ten ",
    "than ",
    "that ",
    "the ",
    "their ",
    "them ",
    "themselves ",
    "then ",
    "thence ",
    "there ",
    "thereafter ",
    "thereby ",
    "therefore ",
    "therein ",
    "thereupon ",
    "these ",
    "they ",
    "thickv ",
    "term ",
    "thin ",
    "third ",
    "this ",
    "those ",
    "though ",
    "three ",
    "through ",
    "throughout ",
    "thru ",
    "thus ",
    "to ",
    "together ",
    "too ",
    "top ",
    "toward ",
    "towards ",
    "twelve ",
    "twenty ",
    "two ",
    "un ",
    "under ",
    "until ",
    "up ",
    "upon ",
    "us ",
    "very ",
    "via ",
    "was ",
    "we ",
    "well ",
    "were ",
    "what ",
    "whatever ",
    "when ",
    "whence ",
    "whenever ",
    "where ",
    "whereafter ",
    "whereas ",
    "whereby ",
    "wherein ",
    "whereupon ",
    "wherever ",
    "whether ",
    "which ",
    "while ",
    "whither ",
    "who ",
    "whoever ",
    "whole ",
    "whom ",
    "whose ",
    "why ",
    "will ",
    "with ",
    "within ",
    "without ",
    "would ",
    "yet ",
    "you ",
    "your ",
    "yours ",
    "yourself ",
    "yourselves ",
    "the ",
    "likely ",
    "names "
);

You may have noticed by the space after I was trying to avoid cutting off strings and want to only replace whole matches (to a NULL value) from my stopword list.

Realizing that str_replace is probably secondary to capabilities and benefits, I turned my eye towards building a preg_replace array in attempt to regex whole words using word boundaries.

$pregreplacestopwords = array(
"/\ba\b/",
"/\babout\b/",
"/\babove\b/",
"/\babove\b/",
"/\bacross\b/",
"/\bafter\b/",
"/\bafterwards\b/",
"/\bagain\b/",
"/\bagainst\b/",
"/\ball\b/",
"/\balmost\b/",
"/\balone\b/",
"/\balong\b/",
"/\balready\b/",
"/\balso\b/",
"/\balthough\b/",
"/\balways\b/",
"/\bam\b/",
"/\bamong\b/",
"/\bamongst\b/",
"/\bamoungst\b/",
"/\bamount\b/",
"/\ban\b/",
"/\band\b/",
"/\banother\b/",
"/\bany\b/",
"/\banyhow\b/",
"/\banyone\b/",
"/\banything\b/",
"/\banyway\b/",
"/\banywhere\b/",
"/\bare\b/",
"/\baround\b/",
"/\bas\b/",
"/\bat\b/",
"/\bback\b/",
"/\bbe\b/",
"/\bbecame\b/",
"/\bbecause\b/",
"/\bbecome\b/",
"/\bbecomes\b/",
"/\bbecoming\b/",
"/\bbeen\b/",
"/\bbefore\b/",
"/\bbeforehand\b/",
"/\bbehind\b/",
"/\bbeing\b/",
"/\bbelow\b/",
"/\bbeside\b/",
"/\bbesides\b/",
"/\bbetween\b/",
"/\bbeyond\b/",
"/\bbill\b/",
"/\bboth\b/",
"/\bbottom\b/",
"/\bbut\b/",
"/\bby\b/",
"/\bcan\b/",
"/\bcannot\b/",
"/\bcant\b/",
"/\bco\b/",
"/\bcon\b/",
"/\bcould\b/",
"/\bcouldnt\b/",
"/\bcry\b/",
"/\bconsidered\b/",
"/\bdescribe\b/",
"/\bdetail\b/",
"/\bdo\b/",
"/\bdid\b/",
"/\bdone\b/",
"/\bdown\b/",
"/\bdue\b/",
"/\bduring\b/",
"/\beach\b/",
"/\beg\b/",
"/\beight\b/",
"/\beither\b/",
"/\beleven\b/",
"/\belse\b/",
"/\belsewhere\b/",
"/\bempty\b/",
"/\benough\b/",
"/\betc\b/",
"/\beven\b/",
"/\bever\b/",
"/\bevery\b/",
"/\beveryone\b/",
"/\beverything\b/",
"/\beverywhere\b/",
"/\bexcept\b/",
"/\bfew\b/",
"/\bfifteen\b/",
"/\bfify\b/",
"/\bfill\b/",
"/\bfind\b/",
"/\bfire\b/",
"/\bfive\b/",
"/\bfor\b/",
"/\bformer\b/",
"/\bformerly\b/",
"/\bforty\b/",
"/\bfound\b/",
"/\bfour\b/",
"/\bfrom\b/",
"/\bfront\b/",
"/\bfull\b/",
"/\bfurther\b/",
"/\bget\b/",
"/\bgive\b/",
"/\bgo\b/",
"/\bhad\b/",
"/\b//has\b/",
"/\bhasnt\b/",
"/\bhave\b/",
"/\bhe\b/",
"/\bhence\b/",
"/\bher\b/",
"/\bhere\b/",
"/\bhereafter\b/",
"/\bhereby\b/",
"/\bherein\b/",
"/\bhereupon\b/",
"/\bhers\b/",
"/\bherself\b/",
"/\bhim\b/",
"/\bhimself\b/",
"/\bhis\b/",
"/\bhow\b/",
"/\bhowever\b/",
"/\bhundred\b/",
"/\bie\b/",
"/\bif\b/",
"/\bIn\b/",
"/\binc\b/",
"/\bindeed\b/",
"/\binterest\b/",
"/\binto\b/",
"/\bis\b/",
"/\bit\b/",
"/\bits\b/",
"/\bitself\b/",
"/\bkeep\b/",
"/\bknown\b/",
"/\b//last\b/",
"/\blatter\b/",
"/\blatterly\b/",
"/\bleast\b/",
"/\blegend\b/",
"/\bless\b/",
"/\bltd\b/",
"/\b//made\b/",
"/\bmany\b/",
"/\bmay\b/",
"/\bme\b/",
"/\bmeanwhile\b/",
"/\bmight\b/",
"/\bmill\b/",
"/\bmine\b/",
"/\bmore\b/",
"/\bmoreover\b/",
"/\bmost\b/",
"/\bmostly\b/",
"/\bmove\b/",
"/\bmuch\b/",
"/\bmust\b/",
"/\bmy\b/",
"/\bmyself\b/",
"/\bname\b/",
"/\bnamely\b/",
"/\bneither\b/",
"/\bnever\b/",
"/\bnevertheless\b/",
"/\bnext\b/",
"/\bnine\b/",
"/\bno\b/",
"/\bnobody\b/",
"/\bnone\b/",
"/\bnoone\b/",
"/\bnor\b/",
"/\bnothing\b/",
"/\bnow\b/",
"/\bnowhere\b/",
"/\bof\b/",
"/\boff\b/",
"/\boften\b/",
"/\bon\b/",
"/\bonce\b/",
"/\bone\b/",
"/\bonly\b/",
"/\bonto\b/",
"/\bor\b/",
"/\bother\b/",
"/\bothers\b/",
"/\botherwise\b/",
"/\bour\b/",
"/\bours\b/",
"/\bourselves\b/",
"/\bout\b/",
"/\b//over\b/",
"/\bown\b/",
"/\bpart\b/",
"/\bper\b/",
"/\bperhaps\b/",
"/\bplease\b/",
"/\bpopular\b/",
"/\bput\b/",
"/\brather\b/",
"/\bre\b/",
"/\bsame\b/",
"/\bsee\b/",
"/\bseem\b/",
"/\bseemed\b/",
"/\bseeming\b/",
"/\bseems\b/",
"/\bserious\b/",
"/\bseveral\b/",
"/\bshe\b/",
"/\bshould\b/",
"/\bshow\b/",
"/\bsince\b/",
"/\bsincere\b/",
"/\bsix\b/",
"/\bsixty\b/",
"/\bso\b/",
"/\bsome\b/",
"/\bsomehow\b/",
"/\bsomeone\b/",
"/\bsomething\b/",
"/\bsometime\b/",
"/\bsometimes\b/",
"/\bsomewhere\b/",
"/\bstill\b/",
"/\bsuch\b/",
"/\btake\b/",
"/\btechnique\b/",
"/\bten\b/",
"/\bthan\b/",
"/\bthat\b/",
"/\bthe\b/",
"/\btheir\b/",
"/\bthem\b/",
"/\bthemselves\b/",
"/\bthen\b/",
"/\bthence\b/",
"/\bthere\b/",
"/\bthereafter\b/",
"/\bthereby\b/",
"/\btherefore\b/",
"/\btherein\b/",
"/\bthereupon\b/",
"/\bthese\b/",
"/\bthey\b/",
"/\bthickv\b/",
"/\bterm\b/",
"/\bthin\b/",
"/\bthird\b/",
"/\bthis\b/",
"/\bthose\b/",
"/\bthough\b/",
"/\bthree\b/",
"/\bthrough\b/",
"/\bthroughout\b/",
"/\bthru\b/",
"/\bthus\b/",
"/\bto\b/",
"/\btogether\b/",
"/\btoo\b/",
"/\btop\b/",
"/\btoward\b/",
"/\btowards\b/",
"/\btwelve\b/",
"/\btwenty\b/",
"/\btwo\b/",
"/\bun\b/",
"/\bunder\b/",
"/\buntil\b/",
"/\bup\b/",
"/\bupon\b/",
"/\bus\b/",
"/\bvery\b/",
"/\bvia\b/",
"/\bwas\b/",
"/\bwe\b/",
"/\bwell\b/",
"/\bwere\b/",
"/\bwhat\b/",
"/\bwhatever\b/",
"/\bwhen\b/",
"/\bwhence\b/",
"/\bwhenever\b/",
"/\bwhere\b/",
"/\bwhereafter\b/",
"/\bwhereas\b/",
"/\bwhereby\b/",
"/\bwherein\b/",
"/\bwhereupon\b/",
"/\bwherever\b/",
"/\bwhether\b/",
"/\bwhich\b/",
"/\bwhile\b/",
"/\bwhither\b/",
"/\bwho\b/",
"/\bwhoever\b/",
"/\bwhole\b/",
"/\bwhom\b/",
"/\bwhose\b/",
"/\bwhy\b/",
"/\bwill\b/",
"/\bwith\b/",
"/\bwithin\b/",
"/\bwithout\b/",
"/\bwould\b/",
"/\byet\b/",
"/\byou\b/",
"/\byour\b/",
"/\byours\b/",
"/\byourself\b/",
"/\byourselves\b/",
"/\bthe\b/",
"/\blikely\b/",
"/\bnames\b/"
        );

Created a blank array for it:

$pgreplace = array(" "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," ");

Let's take the word “B.A.” for example and put it into a string variable, make it a sentence for fun.

 $string = 'I got my “B.A.” from...';

Some methods I've tried have been things such as imploding the stop words,

Attempting things such as

preg_replace($pregreplacestopwords, $pregreplacestopwords, $string);

Just get's filled with errors

Warning: preg_replace(): Compilation failed: missing terminating ] for character class at offset 1951 in C:\wamp64\www\pg\test.php on line 664

Warning: preg_replace(): Empty regular expression in C:\wamp64\www\pg\test.php on line 666
NULL 
Warning: preg_replace(): Unknown modifier '/' in C:\wamp64\www\pg\test.php on line 670
NULL

Imploding the array, via$implodestopwords = implode("|", array_map("trim",array_filter($stopwords)));

a|about|above|above|across|after|afterwards|again|against|all|almost|alone|along|already|also

and so forth.

Trying to put this in action

$pattern = '/\b(' . $implodestopwords . ')\b/i';
$string = preg_replace($pattern, "", $string);

var_dump($string);

outputs:

I got “B..” ...

How can I modify my preg_replace to only match exact words and remove them from a large list of words from an array?

Full script here: https://pastebin.com/vwbNjhs9

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