PHP 计数器增加了一个额外的增量答案

【问题标题】：PHP counter adds an extra incrementPHP 计数器增加了一个额外的增量
【发布时间】：2014-11-17 04:48:19
【问题描述】：

我基本上有一个简单的程序，它从表单中获取一些文本作为输入，将文本中的所有单词匹配到两个词典。一个词典包含一个肯定词列表，另一个包含一个否定词列表。对于每个正词匹配，$posMatchCount 会递增。对于每个否定词匹配，$negMatchCount 递增。做一个简单的比较，如果正数更大，程序返回“正”，否则返回“负”。如果正面词 == 负面词，或者没有正面或负面匹配，则返回“中性”。完整代码如下：

        <?php
include("positive_lexicon.php");
include("negative_lexicon.php");
?>
<html>
<head>
    <title>Output</title>
</head>
<body>

<h1>Output</h1>  
<hr>
<?php

$preprocessedDoc2 = "我喜欢这款手机，但讨厌电池，我喜欢屏幕尺寸";

/////////////////////////////////////////////////////////////////////////////////match doc text with POSITIVE sentiment lexicon

$matchedPosWords = NULL;//contains matched words
$posMatchCount = 0;//count of POS matches

$array1 = explode(' ', $preprocessedDoc2);
foreach($array1 as $word){

    if(preg_match("/\s{$word}\s/", $positiveLexicon)){
        $matchedPosWords = $matchedPosWords . $word . " - ";
        $posMatchCount++;
        $posMatch = true; //for subjectivity check
    }
    else{
        $posMatch= false; //for subjectivity check
    }
}

   echo "Matched POSITIVE words: <br><br>";
   echo "<div style=\"background-color:#66FF66\">";
   echo $matchedPosWords . " (Total: {$posMatchCount})";
   echo "</div>";
   echo "<br><br>";

/////////////////////////////////////////////////////////////////////////////////match doc text with NEGATIVE sentiment lexicon   

$matchedNegWords = NULL;//contains matched words
$negMatchCount = 0;//count of NEG matches

$array2 = explode(' ', $preprocessedDoc2);
foreach($array2 as $word2){

    if(preg_match("/\s{$word2}\s/", $negativeLexicon)){
        $matchedNegWords = $matchedNegWords . $word2 . " - ";
        $negMatchCount++;
        $negMatch = true; //for subjectivity check
    }
    else{
        $negMatch = false; //for subjectivity check
    }
}

   echo "Matched NEGATIVE words: <br><br>";
   echo "<div style=\"background-color:#FF5050\">";
   echo $matchedNegWords . " (Total: {$negMatchCount})";
   echo "</div>";
   echo "<br><br>";

/////////////////////////////////////////////////////////////////////////////////comparison between POSITIVE and NEGATIVE words

echo "analyzing document's sentiment ...<br><br>";

function checkPolarity($posWords, $negWords, $posMatch1, $negMatch1){//function to check polarity of doc


    if((($posMatch1==false) && ($negMatch1==false))||($posWords==$negWords)){
        return "<strong>NEUTRAL</strong>"; //if there are no POS or NEG matches, or matches are equal, return NEUTRAL

    }

    if($posWords > $negWords){
        return "<strong>POSITIVE</strong>"; //if count of POS matches is greater than count of NEG matches, return POSITIVE

    }

    else{
        return "<strong>NEGATIVE</strong>"; //if count of NEG matches is greater than count of POS matches, return NEGATIVE

    }



}

$polarity = checkPolarity($posMatchCount, $negMatchCount, $posMatch, $negMatch); //call function to check polarity   

echo "Polarity of the document is: " . $polarity; //display overall polarity
echo "<br><br>";

$polarity = "";



?>

</body>
</html>

但是，有时即使正面词的数量大于负面词的数量，它也会返回“神经”。有时它会额外增加。例如，字符串输入“我喜欢这款手机，但讨厌我喜欢屏幕尺寸的电池”返回以下内容：

Matched POSITIVE words:

love - adore - - (Total: 3)


Matched NEGATIVE words:

hate - - (Total: 2)

尽管只有两个正匹配和一个负匹配，但它给出的正匹配计数为 3，负匹配计数为 2。我知道问题会立即在 SO 上被发现，即使我似乎找不到它。我会试试我的运气..

【问题讨论】：

标签： php regex increment

【解决方案1】：

在我看来，代码看起来并没有错。但是你放的输出

Matched POSITIVE words:

love - adore - - (Total: 3)


Matched NEGATIVE words:

hate - - (Total: 2)

您在最后一个条目中有一个空格，用于正匹配或负匹配，我认为这是错误的。

如果你喜欢，请将代码改成这样进行调试和检查。

echo "Foreach for Positive words started <br/>";
foreach($array1 as $word){

    if(preg_match("/\s{$word}\s/", $positiveLexicon) && trim($word) != "" ){
        echo $word."= <br/>"; // there should be no empty word in this
        $matchedPosWords = $matchedPosWords." - ". $word; // there should be no dash at the last, only word
        $posMatchCount++;
        $posMatch = true; //for subjectivity check
    }
    else{
        $posMatch= false; //for subjectivity check
    }
}
echo "Foreach for Positive words Ended <br/>";

【讨论】：