4

你好,我有一个搜索功能,我将在数据库中搜索关键字。我想突出显示关键字并找到我想在搜索功能中实现的第二个功能。

所以我有这个搜索代码:

<?php 
function searchText($keywords){
    global $db;
    $returned_results = array();
    $where2 = "";

    $keywords = preg_split('/[\s]+/', $keywords); 
    $total_keywords = count($keywords);

    foreach ($keywords as $key=>$keyword){
        $where2 .= "`column` LIKE '%$keyword%'";

        if ($key != ($total_keywords - 1)){ 
            $where2 .= " OR ";
        }
    }

    $results_text = "SELECT `a`, `b`, LEFT(`c`, 150) as `c` FROM `table` WHERE $where2"; 
    $results_num_text = ($query2 = mysqli_query($db, $results_text)) ? mysqli_num_rows($query2) : 0; 
    if ($results_num_text === 0){
        return false;
    } else {

        while ($row = mysqli_fetch_assoc($query2)){

            $returned_results[] = array(
                'ab' => $row['ab'],
                'cd' => $row['cd'], 
            );
        }

        return $returned_results;
    }
}
?>

并希望在其中实现第二个功能:

<?php
function mark_words ($text, $words, $colors = false)
{

    if (!$colors || !is_array($colors) ) {
        $colors = array('#ff9999', '#ffff99', '#ff99ff', '#99ffff','#99ff99');
    }

    $c = 0;

    foreach ($words as $w) {

        $w = preg_quote(trim($w));

        if($w=='') {
            continue;
        }

        $regexp = "/($w)(?![^<]+>)/i";

        $replacement = '<b style="background-color:'.$colors[$c].'">\\1</b>';

        $text = preg_replace ($regexp,$replacement ,$text);

        $c++;
        if ($c >= count($colors)) {
            $c=0;
        }
    }
    return $text;
}

$example = <<< EOT
some text is here inside
EOT;

$search = array('some','is', 'inside');

echo mark_words($example, $search);
?> 

所以我有这个不起作用的代码:

<?php 
function searchText($keywords, $colors = false){
    global $db;

     if (!$colors || !is_array($colors) ) {
        $colors = array('#ff9999', '#ffff99', '#ff99ff', '#99ffff','#99ff99');
    }

    $c = 0;

    $returned_results = array();
    $where2 = "";

    $keywords = preg_split('/[\s]+/', $keywords); 
    $total_keywords = count($keywords);

    foreach ($keywords as $key=>$keyword){

    $regexp = "/($w)(?![^<]+>)/i";
        $replacement = '<b style="background-color:'.$colors[$c].'">\\1</b>';

        $text = preg_replace($regexp,$replacement ,$keywords);
        $c++;

        if ($c >= count($colors)) {
            $c=0;
        }

        $where2 .= "`b` LIKE '%$keyword%'";

        if ($key != ($total_keywords - 1)){ 
            $where2 .= " OR ";
        }
    }

    $results_text = "SELECT `a`, LEFT(`b`, 150) as `b`, `c` FROM `table` WHERE $where2";
    $results_num_text = ($query2 = mysqli_query($db, $results_text)) ? mysqli_num_rows($query2) : 0; 
    if ($results_num_text === 0){
        return false;
    } else {

        while ($row = mysqli_fetch_assoc($query2)){

            $returned_results[] = array(
                'ab' => $row['a'],
                'cd' => $row['b'],
            );
        }

        return $returned_results;
        $highlight = array($keywords);
        echo mark_words($highlight);
    }
}
?>

当我寻找它时,我发现了两种可能性。第一个是一个函数,第二个是直接从选择查询中突出显示它:

SELECT
        REPLACE(`col`, 'foobar', '<span class="highlight">foobar</span>') AS `formated_foobar`
  FROM
        …
  WHERE
        `col` LIKE "%foobar%"

所以我的问题是如何将第二个功能实现到搜索功能中,还是使用第二种方法更好?

如果有人可以帮助我,我将不胜感激。多谢。

4

3 回答 3

13

你不应该让自己太难。您只需要用应用了所需样式的跨度中包含的单词替换每个出现的单词。这应该适合你:

function highlight_word( $content, $word, $color ) {
    $replace = '<span style="background-color: ' . $color . ';">' . $word . '</span>'; // create replacement
    $content = str_replace( $word, $replace, $content ); // replace content

    return $content; // return highlighted data
}

function highlight_words( $content, $words, $colors ) {
    $color_index = 0; // index of color (assuming it's an array)

    // loop through words
    foreach( $words as $word ) {
        $content = highlight_word( $content, $word, $colors[$color_index] ); // highlight word
        $color_index = ( $color_index + 1 ) % count( $colors ); // get next color index
    }

    return $content; // return highlighted data
}



// words to find
$words = array(
    'normal',
    'text'
);

// colors to use
$colors = array(
    '#88ccff',
    '#cc88ff'
);

// faking your results_text
$results_text = array(
    array(
        'ab'    => 'AB #1',
        'cd'    => 'Some normal text with normal words isn\'t abnormal at all'
    ), array(
        'ab'    => 'AB #2',
        'cd'    => 'This is another text containing very normal content'
    )
);

// loop through results (assuming $output1 is true)
foreach( $results_text as $result ) {
    $result['cd'] = highlight_words( $result['cd'], $words, $colors );

    echo '<fieldset><p>ab: ' . $result['ab'] . '<br />cd: ' . $result['cd'] . '</p></fieldset>';
}

使用正则表达式替换内容也可以,但使用起来str_replace()要快一些。

这些函数接受这些参数:

highlight_word( string, string, string );

highlight_words( string, array, array );

上面的示例导致:

在此处输入图像描述

于 2012-04-25T10:09:01.417 回答
3

通过使用 str_ireplace 而不是 str_replace,该函数将不区分大小写

于 2013-04-18T07:41:40.593 回答
2

我不会使用 SQL 方法。随着时间的推移,你有越来越多的突出规则,这将变得难以管理。foo处理需要以不同方式突出显示foobar但一个包含另一个的情况也更棘手。

将数据处理与格式分开。

于 2012-04-25T10:01:23.093 回答