替换html标签怎么办？

[jellday]

比如要替换<strong>为 <b>

preg_replace("strong","b",$ctxt); 不行啊

[一起混吧]

str_replace("strong","b",$ctxt);

[一起混吧]

或者：preg_replace("/strong/i","b",$ctxt); //第一个参数是正则

[shui淼]

比如要替换<strong>为 <b>

如果你是想用<strong>换为<b>以下代码

$txt = "<strong>";

$content = preg_replace('/<strong>/',"<b>",$txt);
echo htmlentities($content);
echo htmlentities($txt);
如果你是想用strong换为b以下代码
echo preg_replace("/strong/","b",$ctxt);