黄聪：php实现关键词高亮

直接上代码

function highlight($sString, $aWords) {   
        if (!is_array ($aWords) || emptyempty ($aWords) || !is_string ($sString)) {   
            return false;   
        }   
       
        $sWords = implode ('|', $aWords);   
        return preg_replace ('@\b('.$sWords.')\b@si', '<strong style="background-color:yellow">$1</strong>', $sString);   
    }