如果包含或匹配搜索词，则将整个单词和单个字符包含在 HTML 标记中

Question

我想将 HTML 标签添加到包含搜索词的单词中，并且我想在每次出现的搜索词周围添加嵌套标签。

示例字符串：

$str = "i like programming very much";

示例搜索词：

$word = "r";

所需结果：

i like <span class='pice1'>p<span class='pice2'>r</span>og<span class='pice2'>r</span>aming</span> <span class='pice1'>ve<span class='pice2'>r</span>y</span> much

我为其编写了以下正则表达式，但有时不起作用。

$str = preg_replace(
    "/([^\s{" . preg_quote($word) . "}]*?)(" . preg_quote($word) . ")([^\s{" . preg_quote($word) . "}]*)/siu",
    "<span class='pice1'>$1</span><span class='pice2'>$2</span><span class='pice1'>$3</span>",
    $str
);

Answer 1

为什么不直接使用 str_replace() 呢？我认为这更简单

$search = "ab";
$word = "ameriabank";
$newstr = "<span class=\"pice1\">".str_replace($search, $word, "</span><span class=\"pice3\">".$search."</span></span class=\"pice1>\")."</span>";

Answer 2

$str = "i like programming very much";
$w = "r";
echo preg_replace("/($w)/", "<b>$1</b>", $str);

输出：

i like p<b>r</b>og<b>r</b>amming ve<b>r</b>y much

回答评论：分两步完成。

$str = "i like programming very much ready tear";
$w = "r";
$str = preg_replace("/\\b((?:\\w+|\\b)$w(\\w+|\\b))\\b/", "<i>$1</i>", $str);
$str = preg_replace("/($w)/", "<b>$1</b>", $str);
echo $str;

输出：

i like <i>p<b>r</b>og<b>r</b>amming</i> <i>ve<b>r</b>y</i> much <i><b>r</b>eady</i> <i>tea<b>r</b></i>

Answer 3

这种方式怎么样：

$str = "i like programming very much";
$word = "r";
$list = explode(' ',$str);
for($i=0; $i<count($list); $i++) {
    if(preg_match("/$word/", $list[$i])) {
        $list[$i] = '<i>'.preg_replace("/$word/siu", "<b>$word</b>", $list[$i]).'</i>';
    }
}
$str = implode(' ',$list);
echo $str,"\n";

Answer 4

$str = "i like programming very much";
$word = "r";
function highlight($matches)
{
    global $word;
    return '<span class="pice1">'.str_replace($word,'<span class="pice2">'.$word.'</span>',$matches[0]).'</span>';
}
echo $str = preg_replace_callback("/([^\s]*?".preg_quote($word, '/')."[^\s]*)/siu", highlight, $str);

完成这项工作（它也适用于外语）...

Answer 5

要将包含搜索词的整个单词包装在给定 HTML 标记中，请使用 preg_replace_callback() 并使正则表达式模式不区分大小写且以 unicode 安全方式匹配搜索词前后的零个或多个单词字符。

隔离整个单词后，再次搜索该搜索词，并用另一个 HTML 标签包裹每个出现的位置。 str_replace() 不适合这种内部替换，因为它不会保留匹配搜索词的大小写。

代码：(演示)

<style>
    .whole_word {color: blue;}
    .sub_word {color: red;}
</style>

<?php

$str = 'i like programming veRy much';
$find = 'r';
$safeFind = preg_quote($find);
$wordStart = '<span class="whole_word">';
$wordEnd = '</span>';
$partStart = '<span class="sub_word">';
$partEnd = '</span>';

echo preg_replace_callback(
    "#\w*{$safeFind}\w*#iu",
    fn($m) => $wordStart . preg_replace("#{$safeFind}#iu", $partStart . '\0' . $partEnd, $m[0]) . $wordEnd,
    $str
);

原始输出：

i like <span class="whole_word">p<span class="sub_word">r</span>og<span class="sub_word">r</span>amming</span> <span class="whole_word">ve<span class="sub_word">R</span>y</span> much

渲染的 HTML