PHP 从字符串中获取搜索词数组 [英] PHP get array of search terms from string

问题描述

是否有一种简单的方法可以解析包含否定词在内的搜索词字符串?

Is there an easy way to parse a string for search terms including negative terms?

'this -that "the other thing" -"but not this" "-positive"' 

将更改为

array(
  "positive" => array(
    "this",
    "the other thing",
    "-positive"
  ),
  "negative" => array(
    "that",
    "but not this"
  )
)

因此这些术语可用于搜索.

so those terms could be used to search.

推荐答案

下面的代码将解析您的查询字符串并将其拆分为正面和负面的搜索词.

The code below will parse your query string and split it up into positive and negative search terms.

// parse the query string
$query = 'this -that "-that" "the other thing" -"but not this" ';
preg_match_all('/-*"[^"]+"|\S+/', $query, $matches);

// sort the terms
$terms = array(
    'positive' => array(),    
    'negative' => array(),
);
foreach ($matches[0] as $match) {
    if ('-' == $match[0]) {
        $terms['negative'][] = trim(ltrim($match, '-'), '"');
    } else {
        $terms['positive'][] = trim($match, '"');
    }
}

print_r($terms);

输出

Array
(
    [positive] => Array
        (
            [0] => this
            [1] => -that
            [2] => the other thing
        )

    [negative] => Array
        (
            [0] => that
            [1] => but not this
        )
)

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