php 替换掉textarea换行符

</p><p><input type="submit" /></p><p></form></p><p><?php</p><p>$str=$_GET['test'];</p><p>echo $str.'<br />';</p><p>$arr=explode("n",$str);</p><p>print_r($arr);</p><p>echo count($arr).'<br />';//回车数</p><p>$str1=nl2br($str);//回车换成换行默认函数</p><p>echo $str1;</p><p>?></p><p></body></p><p></html></p><p>再来看一段dz论坛中例子。不多说了，直接上代码：</p><p>$names = preg_split('/rn/',$_POST['textarea']);</p><p>foreach($names as $name){</p><p>// todo something eg: echo $name;</p><p>}</p><p>取值很简单，那么赋值呢，在textarea中输出换行符可没那么简单</p><p>$vals = get_from_mydb();</p><p>$tmp = '';</p><p>foreach($vals as $val){</p><p>$tmp .= $val.'</p><p>';</p><p>}</p><p>""和" "是什么意思</p><p><br /></p><p>相信大家都看到了，其实textarea中的回车变成字符就成"n"了，所以php处理textarea中的回车其实就是处理字符中的"n".</p></p> <p style="text-align:right;">（编辑：安卓应用网）</p> <p style="text-align:right;">【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!</p> </td> </tr> </table> </div> <div class="dede_pagess"><ul class="pagelist"></ul></div> <div class="ad-690"><script src='https://ess.0577qiche.com/d/js/acmsd/ad76.js' language='javascript'></script></div> <div class="g-box10"> <div class="t-2">相关内容</div> <ul class="b-box12"></ul> <ul class="b-box13"><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200528/80724.html" target="_blank">PHP echo,print,printf,sprintf函数之间的区别与用法详解</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200524/60526.html" target="_blank">php 动态多文件上传</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200530/84308.html" target="_blank">php AJAX POST的使用实例代码</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200524/51453.html" target="_blank">解析func_num_args与func_get_args函数的使用</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200523/22503.html" target="_blank">PHP读取文件的常见几种方法</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/66621.html" target="_blank">PHP 将视频转成 MP4 并获取视频预览图(用到ffmpeg)</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200524/60059.html" target="_blank">程序员编程十条戒律</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/70288.html" target="_blank">Yii框架弹出窗口组件CJuiDialog用法分析</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200526/73118.html" target="_blank">php提交表单发送邮件的简单示例</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200524/47429.html" target="_blank">php使用codebase生成随机数</a></li><div class="cl"></div></ul> </div> </div> </div> <div class="right-1 fr"> <div class="g-box8"> <div class="t-2">推荐文章</div> <ul></ul> </div> <div class="g-box11"> <div class="t-2">站长推荐</div> <ul class="b-box7"><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/62925.html" target="_blank">php 使用pathinfo(), parse_url(), basename()解</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200528/80843.html" target="_blank">PHP函数之日期时间函数date()使用详解</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200526/73934.html" target="_blank">wordpress 3.6 才引入的处理输入转义字符的</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/63752.html" target="_blank">创建画布（验证码）</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/67429.html" target="_blank">在线HTTP接口测试工具</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/72721.html" target="_blank">小结下MySQL中文乱码，phpmyadmin乱码，php乱码 </a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200525/62524.html" target="_blank">php+ajax+json的一个最简单实例</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200522/9988.html" target="_blank">php-msf源码详解</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200523/26339.html" target="_blank">Yii使用DeleteAll连表删除出现报错问题的解决方法</a></li><li><a href="https://www.0791zz.com/html/kaifa/PHP/20200522/10563.html" target="_blank">PHP中register_shutdown_function函数的基础介绍</a></li></ul> </div> <script type="text/javascript">jQuery(".g-box8").slide({ titCell:"li",triggerTime:0 }); </script> <div class="ad-250"><script src='https://ess.0577qiche.com/d/js/acmsd/ad103.js' language='javascript'></script></div> <div class="g-box3 u-3"> <div class="t-1">热点阅读</div> <ul class="b-box2"></ul> </div> <div class="ad-250"><script src='https://ess.0577qiche.com/d/js/acmsd/ad77.js' language='javascript'></script></div> </div> <div class="cl"></div> </div> <div class="ad-960"><script src='https://ess.0577qiche.com/d/js/acmsd/ad78.js' language='javascript'></script></div> <div class="footer"> <p>【免责声明】本站内容转载自互联网，其发布内容言论不代表本站观点，如果其链接、内容的侵犯您的权益，烦请提交相关链接至邮箱bqsm@foxmail.com我们将及时予以处理。</p> <p>建议您使用1920×1080分辨率、谷歌浏览器Google Chrome、Microsoft Edge以获得本站的最佳浏览效果</p> <p>Copygight © 2008-2022 https://www.0791zz.com/ All Rights Reserved. 安卓应用网</p> <p><script type="text/javascript" src="//js.users.51.la/21280179.js"></script></p> </div> </body> </html>