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Problem with replacing newline characters with

in php

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Release： 2016-08-18 09:16:33
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<p>用nl2br处理了从数据库里取的数据，不想使用<br>换行，想使用<p>分段。<br>网上找到的方法：

<code>$content = '<p>'.str_replace("<br />","</p><p>",$content).'</p>';
</code>
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<p>但是我的数据里还有别的一些标签，转换的时候就会有问题。<br>比如我有这样一段数据：

<code>blahblah<br />
<pre class="brush:php;toolbar:false"><code><br />
blahblah<br />
blahblah<br />
</code>
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<p>就会变成

<code><p>blahblah</p><p>
<pre class="brush:php;toolbar:false"><code></p><p>
blahblah</p><p>
</code>

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<p>这样我的<pre class="brush:php;toolbar:false">&lt;code&gt;&lt;/code&gt;</pre>代码块就被隔断了。<br>有没有什么办法不替换<pre class="brush:php;toolbar:false">&lt;code&gt;&lt;/code&gt;</pre>里的换行？

回复内容：

<p>用nl2br处理了从数据库里取的数据，不想使用<br>换行，想使用<p>分段。<br>网上找到的方法：

<code>$content = '<p>'.str_replace("<br />","</p><p>",$content).'</p>';
</code>
Copy after login
Copy after login
<p>但是我的数据里还有别的一些标签，转换的时候就会有问题。<br>比如我有这样一段数据：

<code>blahblah<br />
<pre class="brush:php;toolbar:false"><code><br />
blahblah<br />
blahblah<br />
</code>
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<p>就会变成

<code><p>blahblah</p><p>
<pre class="brush:php;toolbar:false"><code></p><p>
blahblah</p><p>
</code>

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<p>这样我的<pre class="brush:php;toolbar:false">&lt;code&gt;&lt;/code&gt;</pre>代码块就被隔断了。<br>有没有什么办法不替换<pre class="brush:php;toolbar:false">&lt;code&gt;&lt;/code&gt;</pre>里的换行？

<code class="php">echo preg_replace('#([a-zA-Z]*)<br\s*\/>#', "<p>$1</p>", "blahblah<br />
<pre class="brush:php;toolbar:false"><code><br />
blahblah<br />
blahblah<br />
</code>
");
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<p>p和br都是标签，没有什么转换的必要，你想要<p>的效果也就是为了好看点，所以直接用css就行了，别折腾PHP了。例如

<code>p br {margin-bottom: 1em;}
p pre br {margin-bottom: 0;}</code>
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