Question

我需要以下内容 -

如果我有一个句子

$str = "i like programming very much";

我搜索一个单词

$word = "r";

我希望它能够返回句子

“我喜欢* p *** r *** og *** r *** aming * * ve *** r *** y *”

我为它编写了以下正则表达式，但它有时不起作用。

$str = preg_replace("/([^\s{".preg_quote($word)."}]*?)(".preg_quote($word).")([^\s{".preg_quote($word)."}]*)/siu","$1$2$3",$str);

你能告诉我我写错了什么吗？

由于

更新：

例如，它

时不起作用

$str = "ameriabank"; and $word = "ab";

...

Answer 1

为什么不使用str_replace（）？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

访问highlight multiple keywords in search并感到惊讶。

Answer 4

这样：

$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 5

$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);

做好工作（也适用于外语）......

这个正则表达式有什么问题？

5 个答案: