PHP：用字符串干草堆中的html元素包装（全部）针

Question

对于我的自动建议功能，我需要为建议中的摘录着色......所以......

如果我搜索类似 “萨” 建议者给了我以下内容

三星 讽刺 数据 e-sata ...

现在我想从我的函数中突出显示 - 将“sa”针（所有出现）包裹在所需的 html 标记中。

喜欢 萨msung sa轮胎 sata e-sata

• 应该是 utf8 安全的
• 它应该保留大写
• 它应该忽略 HTML

在 PHP 网站上，我找到了一个可以替换并保持大写的函数...我对其进行了修改，使其对 utf8 友好...

function ext_str_ireplace($findme, $replacewith, $text) { 
    // Replaces $findme in $subject with $replacewith 
    // Ignores the case and do keep the original capitalization by using $1 in $replacewith 
    // Required: PHP 5 

    $rest = $text; 

    $result = ''; 

    while (mb_stripos($rest, $findme) !== false) { 
      $pos = mb_stripos($rest, $findme); 

      // Remove the wanted string from $rest and append it to $result 
      $result .= mb_substr($rest, 0, $pos); 
      $rest = mb_substr($rest, $pos, mb_strlen($rest)-$pos); 

      // Remove the wanted string from $rest and place it correctly into $result 
      $result .= mb_ereg_replace('$1', mb_substr($rest, 0, mb_strlen($findme)), $replacewith); 
      $rest = mb_substr($rest, mb_strlen($findme), mb_strlen($rest)-mb_strlen($findme)); 
    } 

    // After the last match, append the rest 
    $result .= $rest; 

    return $result; 
} 

效果很好……喜欢

ext_str_ireplace("sa", "<b>sa</b>", "Samsung");

直到我将一些 html 代码传递给它

$text= '<p class="red">A client is an application or system that accesses a service made available by a server. </p>';
ext_str_ireplace("cl", "<b>cl</b>", $text);

该函数当然会替换 "cl" 字符串

Answer 1

   function keywords($text, $words)
    {
        if (sizeof($words) == 1)
        {
            $expression = preg_quote($words[0]);
        }
        else
        {
            foreach ($words as $key => $word)
            {
                $words[$key] = preg_quote($word);
            }
            $expression = implode('|', $words);
        }   
        return preg_replace('/('.$expression.')(?=[^>]*(<|$))/iu', '<strong>$1</strong>', $text);
    }

用法：

keywords('Samsung', array('sa', 'ng'));