php给一组指定关键词添加span标签的方法
本文实例讲述了php给一组指定关键词添加span标签的方法。分享给大家供大家参考。具体如下：
这里是php给一组指定的关键词添加span标签，高亮突出显示关键词
//Exampleuse:$spanned=codeWords($string_containing_keywords);
//Mysite:andrew.dx.am
//Usingcolour==blue,butdifferentarraysofwordsanddifferent
//colourscanbeadded.
functiononlyWholeWords(&$value,$key){
//Ignoreswordsafter//commentdelimiters.
//$value="/\b(".$value.")\b/";//doesn'thandlecomments
//$value="/^(?:(?!\/\/).)*\K\b(".$value.")\b/";
//\KlookbehindalternativeisnotsupportedinPHP<5.2.4,souse:
$value="/^((?:(?!\/\/).)*)\b".$value."\b/";
}
functionaddSpan(&$value,$key,$color='blue'){
$value="$1<spanstyle='color:$color'>".$value."</span>";
}
functioncodeWords($code){
$keywords=array('as','break','case','class',
'continue','default','do','elif','else',
'elseif','for','foreach','function','if',
'new','null','return','self','switch',
'this','to','typeof','until',
'var','void','while','with');
$keywords2=$keywords;
array_walk($keywords,'onlyWholeWords');
array_walk($keywords2,'addSpan','blue');
$code=preg_replace($keywords,$keywords2,$code);
return$code;
}
希望本文所述对大家的php程序设计有所帮助。