PHP过滤中禁用单词的文本 [英] PHP Filter text for banned words

问题描述

我们有一个C2C网站，我们不鼓励在我们的网站上销售品牌产品。我们已经建立了Nike和D&；G等品牌词汇的数据库，并制定了一种算法来过滤这些词汇的产品信息，如果产品包含这些词汇，则禁用产品。

我们当前的算法从提供的文本中删除所有空格和特殊字符，并将文本与数据库中的单词进行匹配。这些情况需要通过算法来捕获，并且能够高效捕获：

• 我是耐克世界
• 我有一双宜家鞋
• 我有一些问题
• 我卖iphone外壳
• 我卖iPhone外壳
• 您可以拥有iPhone

现在的问题是它还捕获以下内容：

• 快速服装厂(D&；G)
• Rosnik Electronics(用于耐克)

如何在保持捕获真实案例的效率的同时防止此类错误匹配？

编辑

以下是为更好地理解代码的人准备的代码：

$orignal_txt = preg_replace('/&.{0,}?;/', '', (strip_tags($orignal_txt)));
$orignal_txt_nospace = preg_replace('/W/', '', $orignal_txt);
{
    $qry_kws = array("nike", "iphone", "d&g");
    foreach($qry_kws as $rs_kw)
    {       
        $no_space_db_kw = preg_replace('/W/', '', $rs_kw);
        if(stristr($orignal_txt_nospace, $rs_kw))
        {
            $ipr_banned_keywords[] = strtolower($rs_kw);
        }
        else if(stristr($orignal_txt_nospace, $no_space_db_kw))
        {
                $ipr_banned_keywords[] = strtolower($rs_kw);
        }

    }
}

推荐答案

只是随便玩玩.(不用于生产)

$data = array(
        "i am nike world",
        "i have n ikee shoes",
        "i have nikeeshoes",
        "i sell i-phone casings",
        "i sell iphone-casings",
        "you can have iphone",
        "rapiD Garment factor",
        "rosNIK Electronics",
        "Buy you self N I K E",
        "B*U*Y I*P*H*O*N*E BABY",
        "My Phone Is not available");


$ban = array("nike","d&g","iphone");

示例1：

$filter = new BrandFilterIterator($data);
$filter->parseBan($ban);
foreach ( $filter as $word ) {
    echo $word, PHP_EOL;
}

输出%1

rapiD Garment factor
rosNIK Electronics
My Phone Is not available

示例2

$filter = new BrandFilterIterator($data,true); //reverse filter
$filter->parseBan($ban);
foreach ( $filter as $word ) {
    echo $word, " " , json_encode($word->getBan()) ,  PHP_EOL;
}

输出2

i am nike world ["nike"]
i have n ikee shoes ["nike"]
i have nikeeshoes ["nike"]
i sell i-phone casings ["iphone"]
i sell iphone-casings ["iphone"]
you can have iphone ["iphone"]
Buy you self N I K E ["nike"]
B*U*Y I*P*H*O*N*E BABY ["iphone"]

使用的类

class BrandFilterIterator extends FilterIterator {
    private $words = array();
    private $reverse = false;

    function __construct(array $words, $reverse = false) {
        $this->reverse = $reverse;
        foreach ( $words as $word ) {
            $this->words[] = new Word($word);
        }
        parent::__construct(new ArrayIterator($this->words));
    }

    function parseBan(array $ban) {
        foreach ( $ban as $item ) {
            foreach ( $this->words as $word ) {
                $word->checkMetrix($item);
            }
        }
    }

    public function accept() {
        if ($this->reverse) {
            return $this->getInnerIterator()->current()->accept() ? false : true;
        }
        return $this->getInnerIterator()->current()->accept();
    }
}


class Word {
    private $ban = array();
    private $word;
    private $parts;
    private $accept = true;

    function __construct($word) {
        $this->word = $word;
        $this->parts = explode(" ", $word);
    }

    function __toString() {
        return $this->word;
    }

    function getTrim() {
        return preg_replace('/W/', '', $this->word);
    }

    function accept() {
        return $this->accept;
    }

    function getBan() {
        return array_unique($this->ban);
    }

    function reject($ban = null) {
        $ban === null or $this->ban[] = $ban;
        $this->accept = false;
        return $this->accept;
    }

    function checkMetrix($ban) {
        foreach ( $this->parts as $part ) {
            $part = strtolower($part);
            $ban = strtolower($ban);
            $t = ceil(strlen(strtolower($ban)) / strlen($part) * 100);
            $s = similar_text($part, $ban, $p);
            $l = levenshtein($part, $part);
            if (ceil($p) >= $t || ($t == 100 && $p >= 75 && $l == 0)) {
                $this->reject($ban);
            }
        }
        // Detect Bad Use of space
        if (ceil(strlen($this->getTrim()) / strlen($this->word) * 100) < 75) {
            if (stripos($this->getTrim(), $ban) !== false) {
                $this->reject($ban);
            }
        }
        return $this->accept;
    }
}

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