PHP获取表单textarea数据中的换行问题_PHP教程

<br> <br> <br> <br><meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <br><title>PHP获取表单area数据中的换行问题</title> <br> <br> <br><!--?php <BR-->$content=empty($_POST['content'])?null:trim($_POST['content']); <br>if(!empty($content))echo str_replace("\r",'rl',nl2br($content)); <br>echo "\r".'<br>----------分割线----------------------'."\r"; <br>if(!empty($content))echo str_replace("\n",'nl',nl2br($content)); <br>echo "\n".'<br>----------分割线----------------------'."\n"; <br>if(!empty($content))echo str_replace("\r",'rl',str_replace("\n",'nl',nl2br($content))); <br>echo "\r".'<br>----------分割线----------------------<br>'."\n"; <br>echo 'hello'."\n".'boys!'; <br>echo 'hello'."\r".'boys!'; <br>?> <br> <br> <br> <br> <br>
<p>在浏览器中打开后,在表单中输入:</p>
<p><img src="http://www.bkjia.com/uploads/allimg/131016/11400BQ7-0.jpg"></p>
<p>按提交后,浏览器中显示结果如下:</p>
<p><img src="http://www.bkjia.com/uploads/allimg/131016/1140064139-1.jpg"></p>
<p> </p>
<p>在记事本可可看到如下结果:</p>
<p><img src="http://www.bkjia.com/uploads/allimg/131016/11400C344-2.jpg"></p>
<p><span id="mce_marker"></span></p>
<p>从以上结果可见:</p>
<p>1.PHP函数nl2br()是在字符串中的每个新行(\r\n)之前插入HTML换行符:<br>;<br>2.Windows下的换行是(\r\n);<br>3.在记事本中,\r或\n均有换行的功能;</p>
<p></p>
<p align="left"><span id="url" itemprop="url">http://www.bkjia.com/PHPjc/322401.html</span><span id="indexUrl" itemprop="indexUrl">www.bkjia.com</span><span id="isOriginal" itemprop="isOriginal">true</span><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http://www.bkjia.com/PHPjc/322401.html</span><span id="genre" itemprop="genre">TechArticle</span><span id="description" itemprop="description">测试页面代码:  代码如下:</span></p><pre class="brush:php;toolbar:false layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li>!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" html xmlns="ht...<p></p></li><li>                    </li></ol></pre>