php正则加亮关键字函数方法

php正则加亮关键字函数方法
正则加亮关键字

function highlight_words($str, $words, $color = '#FFFF00') { 
if(is_array($words)) { 
   foreach($words as $k => $word) { 
     $pattern[$k] = "/\b($word)\b/is"; 
     $replace[$k] = '<font style="background-color:'.$color.';">\\1</font>'; 
   } 
} 
else { 
   $pattern = "/\b($words)\b/is"; 
   $replace = '<font style="background-color:'.$color.';">\\1</font>'; 
} 
  
return preg_replace($pattern,$replace,$str); 
}