PHP操作数据库时自动创建字段,如下代码:
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span class="tag-name">html</span><span class="tag">></span><span> </span></span></span></li> <li><span><span class="tag"><span class="tag-name">head</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span><span class="tag"><span class="tag-name">meta</span><span> </span><span class="attribute">http-equiv</span><span>=</span><span class="attribute-value">"Content-Type"</span><span> </span><span class="attribute">content</span><span>=</span><span class="attribute-value">"text/html; charset=gb2312"</span><span> </span><span class="tag">/></span><span> </span></span></span></li> <li><span><span class="tag"><span class="tag-name">title</span><span class="tag">></span><span>动态创建字段 - www.cxybl.com</span><span class="tag"></span><span class="tag-name">title</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span><span class="tag"><span class="tag-name">style</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text/css"</span><span class="tag">></span><span> </span></span></span></li> <li><span><span class="comments"><!--</span> </span></li><li class="alt"><span><span class="comments">.STYLE1 {font-size: 12px}</span> </span></li><li><span><span class="comments">--></span><span> </span></span></li> <li class="alt"><span><span class="tag"></span><span class="tag-name">style</span><span class="tag">></span><span> </span></span></li> <li><span><span class="tag"></span><span class="tag-name">head</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> </span></li> <li><span><span class="tag"><span class="tag-name">body</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span><span class="tag"><span class="tag-name">form</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"form1"</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"form1"</span><span> </span><span class="attribute">method</span><span>=</span><span class="attribute-value">"post"</span><span> </span><span class="attribute">action</span><span>=</span><span class="attribute-value">"index_ok.php"</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">table</span><span> </span><span class="attribute">width</span><span>=</span><span class="attribute-value">"467"</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"289"</span><span> </span><span class="attribute">border</span><span>=</span><span class="attribute-value">"0"</span><span> </span><span class="attribute">cellpadding</span><span>=</span><span class="attribute-value">"0"</span><span> </span><span class="attribute">cellspacing</span><span>=</span><span class="attribute-value">"0"</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">width</span><span>=</span><span class="attribute-value">"168"</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"89"</span><span class="tag">></span><span> </span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">width</span><span>=</span><span class="attribute-value">"289"</span><span class="tag">></span><span> </span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"30"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span class="tag"><span class="tag-name">span</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span>选择表 </span><span class="tag"></span><span class="tag-name">span</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"table"</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text"</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"table"</span><span> </span><span class="attribute">size</span><span>=</span><span class="attribute-value">"20"</span><span> </span><span class="tag">/></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"30"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span class="tag"><span class="tag-name">span</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span>字段 </span><span class="tag"></span><span class="tag-name">span</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"field"</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text"</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"field"</span><span> </span><span class="attribute">size</span><span>=</span><span class="attribute-value">"20"</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"30"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span class="tag"><span class="tag-name">span</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span>类型 </span><span class="tag"></span><span class="tag-name">span</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span class="tag"><span class="tag-name">select</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"type"</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"type"</span><span class="tag">></span><span> </span></span></span></span></li> <li><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>int</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>text</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>date</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>double</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>varchar</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>datetime</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">option</span><span class="tag">></span><span>blob</span><span class="tag"></span><span class="tag-name">option</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"></span><span class="tag-name">select</span><span class="tag">></span><span> </span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></li> <li><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"30"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span class="tag"><span class="tag-name">span</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span>长度 </span><span class="tag"></span><span class="tag-name">span</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"length"</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text"</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"length"</span><span> </span><span class="attribute">size</span><span>=</span><span class="attribute-value">"15"</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"30"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span class="tag"><span class="tag-name">span</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span>NULL </span><span class="tag"></span><span class="tag-name">span</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">class</span><span>=</span><span class="attribute-value">"STYLE1"</span><span class="tag">></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"radio"</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"null"</span><span> </span><span class="attribute">value</span><span>=</span><span class="attribute-value">"null"</span><span class="tag">></span><span> </span></span></span></span></li> <li><span> null </span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"radio"</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"null"</span><span> </span><span class="attribute">value</span><span>=</span><span class="attribute-value">"not null"</span><span class="tag">></span><span> </span></span></span></li> <li><span> not null <span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"30"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span> </span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span class="tag">></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"submit"</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"Submit"</span><span> </span><span class="attribute">value</span><span>=</span><span class="attribute-value">"提交"</span><span> </span><span class="tag">/></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></span></li> <li class="alt"><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li><span> <span class="tag"><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"><span class="tag-name">td</span><span> </span><span class="attribute">height</span><span>=</span><span class="attribute-value">"20"</span><span> </span><span class="attribute">align</span><span>=</span><span class="attribute-value">"right"</span><span class="tag">></span><span> </span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></li> <li><span> <span class="tag"><span class="tag-name">td</span><span class="tag">></span><span> </span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span></span></li> <li class="alt"><span> <span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span></span></li> <li><span> <span class="tag"></span><span class="tag-name">table</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span><span class="tag"></span><span class="tag-name">form</span><span class="tag">></span><span> </span></span></li> <li><span><span class="tag"></span><span class="tag-name">body</span><span class="tag">></span><span> </span></span></li> <li class="alt"><span><span class="tag"></span><span class="tag-name">html</span><span class="tag">></span><span> </span></span></li> </ol>
conn.php:
<ol class="dp-c"> <li class="alt"><span><span><?php </span></span></span></li> <li><span><span class="vars">$id</span><span>=mysql_connect(</span><span class="string">"localhost"</span><span>,</span><span class="string">"root"</span><span>,</span><span class="string">"mysql"</span><span>) </span><span class="keyword">or</span><span> </span><span class="keyword">die</span><span>(</span><span class="string">'连接失败:'</span><span> . mysql_error()); </span></span></li> <li class="alt"><span><span class="keyword">if</span><span>(mysql_select_db(</span><span class="string">"phpjcdb"</span><span>,</span><span class="vars">$id</span><span>)) </span><span class="comment">//说明:phpjcdb 是数据库名称</span><span> </span></span></li> <li><span> <span class="func">echo</span><span> </span><span class="string">""</span><span>; </span></span></li> <li class="alt"><span> <span class="keyword">else</span><span> </span></span></li> <li><span> <span class="func">echo</span><span> (</span><span class="string">'数据库选择失败:'</span><span> . mysql_error()); </span></span></li> <li class="alt"><span>mysql_query(<span class="string">"set names gb2312"</span><span>); </span><span class="comment">//设置为简体中文</span><span> </span></span></li> <li><span>?> </span></li> </ol>
index_ok.php:
<ol class="dp-c"> <li class="alt"><span><span><?php </span></span></span></li> <li><span>session_start(); </span></li> <li class="alt"><span><span class="keyword">include</span><span>(</span><span class="string">"conn.php"</span><span>); </span></span></li> <li><span><span class="keyword">if</span><span>(</span><span class="vars">$_POST</span><span>[</span><span class="string">'Submit'</span><span>]==true){ </span></span></li> <li class="alt"><span> <span class="vars">$null</span><span>=</span><span class="vars">$_POST</span><span>[null]; </span></span></li> <li><span> <span class="vars">$table</span><span> = </span><span class="vars">$_POST</span><span>[</span><span class="string">'table'</span><span>]; </span></span></li> <li class="alt"><span> <span class="vars">$field</span><span> = </span><span class="vars">$_POST</span><span>[</span><span class="string">'field'</span><span>]; </span></span></li> <li><span> <span class="vars">$type</span><span> = </span><span class="vars">$_POST</span><span>[</span><span class="string">'type'</span><span>]; </span></span></li> <li class="alt"><span> <span class="vars">$length</span><span> = </span><span class="vars">$_POST</span><span>[</span><span class="string">'length'</span><span>]; </span></span></li> <li><span> <span class="vars">$mysql</span><span>=mysql_query(</span><span class="string">"alter table $table add $field $type($length) $null"</span><span>); </span></span></li> <li class="alt"><span> <span class="func">echo</span><span> mysql_error(); </span></span></li> <li><span> <span class="keyword">if</span><span>(</span><span class="vars">$mysql</span><span>==true){ </span></span></li> <li class="alt"><span> <span class="func">echo</span><span> </span><span class="string">"字段添加成功!"</span><span>; </span></span></li> <li><span> }<span class="keyword">else</span><span>{</span><span class="func">echo</span><span> </span><span class="string">"添加失败!"</span><span>;} </span></span></li> <li class="alt"><span>} </span></li> <li><span>?> </span></li> </ol>

“你的组织要求你更改PIN消息”将显示在登录屏幕上。当在使用基于组织的帐户设置的电脑上达到PIN过期限制时,就会发生这种情况,在该电脑上,他们可以控制个人设备。但是,如果您使用个人帐户设置了Windows,则理想情况下不应显示错误消息。虽然情况并非总是如此。大多数遇到错误的用户使用个人帐户报告。为什么我的组织要求我在Windows11上更改我的PIN?可能是您的帐户与组织相关联,您的主要方法应该是验证这一点。联系域管理员会有所帮助!此外,配置错误的本地策略设置或不正确的注册表项也可能导致错误。即

Windows11将清新优雅的设计带到了最前沿;现代界面允许您个性化和更改最精细的细节,例如窗口边框。在本指南中,我们将讨论分步说明,以帮助您在Windows操作系统中创建反映您的风格的环境。如何更改窗口边框设置?按+打开“设置”应用。WindowsI转到个性化,然后单击颜色设置。颜色更改窗口边框设置窗口11“宽度=”643“高度=”500“>找到在标题栏和窗口边框上显示强调色选项,然后切换它旁边的开关。若要在“开始”菜单和任务栏上显示主题色,请打开“在开始”菜单和任务栏上显示主题

默认情况下,Windows11上的标题栏颜色取决于您选择的深色/浅色主题。但是,您可以将其更改为所需的任何颜色。在本指南中,我们将讨论三种方法的分步说明,以更改它并个性化您的桌面体验,使其具有视觉吸引力。是否可以更改活动和非活动窗口的标题栏颜色?是的,您可以使用“设置”应用更改活动窗口的标题栏颜色,也可以使用注册表编辑器更改非活动窗口的标题栏颜色。若要了解这些步骤,请转到下一部分。如何在Windows11中更改标题栏的颜色?1.使用“设置”应用按+打开设置窗口。WindowsI前往“个性化”,然

您是否在Windows安装程序页面上看到“出现问题”以及“OOBELANGUAGE”语句?Windows的安装有时会因此类错误而停止。OOBE表示开箱即用的体验。正如错误提示所表示的那样,这是与OOBE语言选择相关的问题。没有什么可担心的,你可以通过OOBE屏幕本身的漂亮注册表编辑来解决这个问题。快速修复–1.单击OOBE应用底部的“重试”按钮。这将继续进行该过程,而不会再打嗝。2.使用电源按钮强制关闭系统。系统重新启动后,OOBE应继续。3.断开系统与互联网的连接。在脱机模式下完成OOBE的所

任务栏缩略图可能很有趣,但它们也可能分散注意力或烦人。考虑到您将鼠标悬停在该区域的频率,您可能无意中关闭了重要窗口几次。另一个缺点是它使用更多的系统资源,因此,如果您一直在寻找一种提高资源效率的方法,我们将向您展示如何禁用它。不过,如果您的硬件规格可以处理它并且您喜欢预览版,则可以启用它。如何在Windows11中启用任务栏缩略图预览?1.使用“设置”应用点击键并单击设置。Windows单击系统,然后选择关于。点击高级系统设置。导航到“高级”选项卡,然后选择“性能”下的“设置”。在“视觉效果”选

在Windows11上的显示缩放方面,我们都有不同的偏好。有些人喜欢大图标,有些人喜欢小图标。但是,我们都同意拥有正确的缩放比例很重要。字体缩放不良或图像过度缩放可能是工作时真正的生产力杀手,因此您需要知道如何对其进行自定义以充分利用系统功能。自定义缩放的优点:对于难以阅读屏幕上的文本的人来说,这是一个有用的功能。它可以帮助您一次在屏幕上查看更多内容。您可以创建仅适用于某些监视器和应用程序的自定义扩展配置文件。可以帮助提高低端硬件的性能。它使您可以更好地控制屏幕上的内容。如何在Windows11

屏幕亮度是使用现代计算设备不可或缺的一部分,尤其是当您长时间注视屏幕时。它可以帮助您减轻眼睛疲劳,提高易读性,并轻松有效地查看内容。但是,根据您的设置,有时很难管理亮度,尤其是在具有新UI更改的Windows11上。如果您在调整亮度时遇到问题,以下是在Windows11上管理亮度的所有方法。如何在Windows11上更改亮度[10种方式解释]单显示器用户可以使用以下方法在Windows11上调整亮度。这包括使用单个显示器的台式机系统以及笔记本电脑。让我们开始吧。方法1:使用操作中心操作中心是访问

Windows上的激活过程有时会突然转向显示包含此错误代码0xc004f069的错误消息。虽然激活过程已经联机,但一些运行WindowsServer的旧系统可能会遇到此问题。通过这些初步检查,如果这些检查不能帮助您激活系统,请跳转到主要解决方案以解决问题。解决方法–关闭错误消息和激活窗口。然后,重新启动计算机。再次从头开始重试Windows激活过程。修复1–从终端激活从cmd终端激活WindowsServerEdition系统。阶段–1检查Windows服务器版本您必须检查您使用的是哪种类型的W


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