PHP中有一个nl2br($string)函数在把内容输入mysql之前需要用这个函数处理一下里面的内容，将回车换行符转换成HTML标记语言里的<br>符号<br>在输出的时候就换行了。<br>建议初学的时候不用着急写代码，先抄代码。自己亲手打上去调试。遇到不懂的就研究，或者百度~抄的多了就都会了</p> </div> </div> <div class="clear"></div> </div> <div class="wdhdnr"> <div class="huidanrtop"> <div class="wdhuidaxinx"> <div class="wdhuidaxm">回答2：</div> </div> </div> <div class="clear"></div> <div class="wdhuidanrmid"> <div class="zuijiacont"> <p>有换行的.文本框里的换行时\n 或者 \r<br>如果你把值重新输入到文本框,就会发现换行还在..<br>但是输出在页面(文本框外)就没有换行了..html解析不了\n \r<br>输出前替换一下就好了.<br>$description = get_description();//得到数据库里的内容.<br>$order = array("\r\n", "\n", "\r");//换行符<br>$newstr = str_replace($order, "<br />", $description); //将换行符替换成<br /><br>然后再输出就行了.</p> </div> </div> <div class="clear"></div> </div> </div> </div> <div class="wendaright"> <div class="wdluluerwema"> <div class="wdxgwttop">相关问答</div> <div class="wdxgwtnr"> </div> <div class="clear"></div> </div> <!-- 其他随机问答['id'=>alphaID($like['zid'])] --> <div class="wdluluerwema"> <div 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