具有多个关键字和排序结果的 PHP 搜索数组

Question

我有一个计划，从我准备的txt文件中进行搜索，txt文件内容类似下面这样

一个.txt

Amy Jefferson
Nathalie Johnson
Emma West
Donna Jefferson
Tanya Nathalie
George West
Emma Watson
Emma Jefferson

如果代码是这样的

一个.php

$filename = "a.txt";
$example = file($filename, FILE_IGNORE_NEW_LINES);
$searchword = 'Emma Jefferson';
$matches = array();
foreach($example as $k=>$v) {
    if(preg_match("/\b$searchword\b/i", $v)) {
        $matches[$k] = $v;
        echo $matches[$k]."<br>";
    }
}

结果只会是“Emma Jefferson”

如果我使用这个代码

b.php

$filename = "a.txt";
$example = file($filename, FILE_IGNORE_NEW_LINES);
$searchword = 'Emma Jefferson';
$matches = array();
foreach($example as $k=>$v) {
    $searchword2 = str_ireplace(" ", "|", $searchword);
    if(preg_match("/\b$searchword2\b/i", $v)) {
        $matches[$k] = $v;
        echo $matches[$k]."<br>";
    }
}

结果会是这样的

Amy Jefferson
Emma West
Donna Jefferson
Emma Watson
Emma Jefferson

唯一的结果，但最后一个结果是“Emma Jefferson”

所以问题是我如何搜索 Emma Jefferson，结果排序是这样的

Emma Jefferson
Emma Watson
Emma West
Amy Jefferson
Donna Jefferson

所以基本上它首先搜索“Emma Jefferson”整个单词，然后是“Emma”，最后一个是“Jefferson”

更新 我为这个问题投票支持 Don't Panic 代码，但我想在这里感谢所有贡献者 Don't Panic、RomanPerekhrest、Sui Dream、Jere、i-man，你们都是最棒的！

帕蒂极客

Answer 1

您当前会立即回显结果，因此它们按文本顺序排列。

您可以搜索完整字符串和部分匹配，然后搜索concatenate results。

foreach($example as $k=>$v) {
    if(preg_match("/\b$searchword\b/i", $v)) {
        $fullMatches[] = $v;
    }
    if(preg_match("/\b$searchword2\b/i", $v)) {
        $matches[] = $v;
    }
}
$matches = array_unique(array_merge($fullMatches, $matches));
foreach($matches as $k => $v)
    echo $v . "<br>";

更新：

多词变体：

$words = ['Emma', 'Jefferson'];
$matches = array();
foreach($example as $k => $v) {
    $fullStr = implode(' ', $words);
    if(preg_match("/\b$fullStr\b/i", $v))
        $matches[0][] = $v;
    $str = "";
    $i = 1;
    foreach($words as $word) {
        if ($str === "")
            $str = $word;
        else
            $str .= '|' . $word;
        if(preg_match("/\b$str\b/i", $v))
            $matches[$i][] = $v;
        $i++;
    }
}
$result = array();
foreach($matches as $firstKey => $arr) {
    foreach($arr as $secondKey => $v) {
        $result[] = $v;
    }
}
$result = array_unique($result);
foreach($result as $k => $v)
    echo $v . "<br>";

Answer 2

复杂的解决方案：

$lines = file('a.txt', FILE_IGNORE_NEW_LINES);
$name = 'Emma';
$surname = 'Jefferson';
$emmas = $jeffersons = [];

foreach ($lines as $l) {
    if (strpos($l, $name) === 0) {
        $emmas[] = $l;
    } elseif ( strrpos($l, $surname) === (strlen($l) - strlen($surname)) ) {
        $jeffersons[] = $l;
    }
}

usort($emmas, function($a,$b){
    return strcmp(explode(' ', $a)[1], explode(' ', $b)[1]);
});
usort($jeffersons, function($a,$b){
    return strcmp($a, $b);
});

$result = array_merge($emmas, $jeffersons);
print_r($result);

输出：

Array
(
    [0] => Emma Jefferson
    [1] => Emma Watson
    [2] => Emma West
    [3] => Amy Jefferson
    [4] => Donna Jefferson
)

Answer 3

您将不得不编写一个新循环或开始对 Array 后缀进行排序，因为 foreach 循环一次采用一个元素名称，测试它是否与您的搜索词匹配，如果匹配，则名称放在末尾你的新数组$matches[]。所以

    if(preg_match("/\b$searchword2\b/i", $v)) {
    $matches[$k] = $v;
    echo $matches[$k]."<br>";
}

part 不知道 $matches[] 中存在或不存在的名称。

所以我的建议是：

$filename = "a.txt";
$example = file($filename, FILE_IGNORE_NEW_LINES);
$searchword = 'Emma Jefferson';
$matches = array();



$searchword2 = array($searchword, explode(" ", $searchword)[0], explode(" ", $searchword)[1]);
$isThisNameAlreadyInTheList;

foreach($searchword2 as $actualSearchword) {

    foreach($example as $k=>$v) {

        $isThisNameAlreadyInTheList = false;
        foreach($matches as $match) {   
            if(preg_match("/\b$match\b/i", $v)) {
                $isThisNameAlreadyInTheList = true;
            }
        }

        if (!$isThisNameAlreadyInTheList) {
            if(preg_match("/\b$actualSearchword\b/i", $v)) {
                $matches[$k] = $v;
                echo $matches[$k]."<br>";
            }
        }
    }

}

Answer 4

我不知道使用正则表达式解决方案来考虑匹配位置的方法，但是如果您将搜索字符串和术语转换为单词数组，则可以做到。

通过这种方法，我们迭代文本项并为搜索词中的每个单词构建一个位置匹配数组，然后按匹配数对结果进行排序，然后是匹配位置。

$search_words = explode(' ', strtolower($searchword));

foreach ($example as $item) {
    $item_words = explode(' ', strtolower($item));

    // look for each word in the search term
    foreach ($search_words as $i => $word) {
        if (in_array($word, $item_words)) {

            // add the index of the word in the search term to the result
            // this way, words appearing earlier in the search term get higher priority
            $result[$item][] = $i;
        }
    }
}

// this will sort alphabetically if the uasort callback returns 0 (equal)
ksort($result);

// sort by number of matches, then position of matches    
uasort($result, function($a, $b) {
    return count($b) - count($a) ?: $a <=> $b;
});

// convert keys to values    
$result = array_keys($result);

Answer 5

我会像这样使用 preg_match_all 解决方案：

$searchName = "Emma Jefferson";
$searchTerms = explode(' ', $searchName);

$pattern = "/(\b$searchTerms[0]\b \b$searchTerms[1]\b)|(\b$searchTerms[0]\b \w+)|(\w* \b$searchTerms[1]\b)/i";

$output = [];
preg_match_all($pattern, implode(' | ', $example), $out);

foreach($out as $k => $o){
    if($k == 0){
        continue;
    }

    foreach($o as $item){
        if(!empty($item)){
            $output[] = $item;
        }
    }
}

print_r($output);

您也可以将文件作为字符串引入并避免内爆部分。