求php牛人写个判断解决方案

求php牛人写个判断

本帖最后由 music_vip_2009 于 2014-01-03 23:21:20 编辑 用php如何判断第一次出现的关键词为那么第一个关键词不加标签，则在第二次出现的时候加上链接！
示例：如果第一个关键词是

<strong>百度</strong>

。那这个标签则过滤掉标签，然后再第二次出现“百度”这个词的时候加上标签



不知道我这样说的清楚不啊，各位php大牛如果不理解请回复我啊！小弟没分了，谢谢各位大哥的帮忙！

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------解决方案--------------------

$html=<<<EOT<br />
<strong>文字1</strong><br />
<strong>文字2</strong><br />
<strong>文字3</strong><br />
<strong>文字4</strong><br />
<strong>文字5</strong><br />
EOT;<br />
preg_match_all('@<strong>(.*?)<\/strong>@i',$html,$match);<br />
foreach($match[0] as $k=>$row){<br />
	if($k==0){<br />
		$result=$row;<br />
	}else{<br />
		$result.='<a>'.$row.'</a>';<br />
	}<br />
}<br />
echo $result;

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