How to replace the search title keyword in php with red color

php search and replace red implementation method: first open the corresponding PHP file; then search for keywords through the "if(!empty($_GET['kws'])) {...}" method and Just replace all places containing keywords with red fonts.

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php replace the search title keyword with red

//将包含关键字的地方全部替换为红色字体（不区分大小写）
if(!empty($_GET['kws'])) //搜索关键字
{
    $k = trim($_GET['kws']);
    foreach($result as $key =>$value){
        $result[$key][&#39;title&#39;] = str_ireplace($k, "<font color=&#39;red&#39;>$k</font>", $value[&#39;title&#39;]);
    }
}

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