php教程之表单提交实例
一个超简单的初学者用的php教程之表单提交实例有需要的朋友参考一下。下面我们将创建一个复杂的表单,代码如下所示。
代码如下 | 复制代码 |
Copy after login Copy after login Copy after login |
maxlength是与密码文本框关联的属性,它限制用户输入密码的最大长度为10个字符。
age列表框是列表菜单,它的命名属性下都有自己的值供选择。selected是一个特定的属性选择元素,如果某个option附加有该属性,在显示时就把该项列为第一项显示。
intro文本框中的内容,按照rows和cols显示文字、行和列宽。
fave_sport是一组单选按钮(radio),我们要按组命名元素名称,比如这一组单选按钮都叫做fave_sport,用户只可选择一个,发送脚本端也只存在一个值。
和单选项一样,所有多选项成员也须有同名的属性,而属性名称需要添加括号[],这样就把多选项的值以数组形式发送给PHP,languages就是这种形式。
checked标签是指单选项和多选项中的某个值,默认已经被选择。 上面表单的显示画面如图5-3所示。 图5-3 因为上面HTML中的form表单使用的是POST方法传递数据,所以用户提交的数据会保存到$_POST或$_REQUEST的超级全局数组中,我们根据$_POST数组中的值就可以处理提交的数据。 将上面表单中数据提交到someform.php脚本,该脚本的处理逻辑如下:
代码如下 | 复制代码 |
//通过判断按钮的变量名是否在$_POST中定义,如果有表示该表单已提交<br>if(isset($_POST["btn_submit"])){<br>if (empty($_POST['username'])){<br>echo "您没有输入用户名";<br>exit(0);<br>}<br>if (empty($_POST['password'])){<br>echo "您没有输入密码: ";<br>exit(0);<br>}<br>echo "您的用户名: ".$_POST['user_name']."<br>";<br>echo "您的密码(明文): ".$_POST['password']."<br>";<br>echo "您的年龄: ".$_POST['age']."<br>";<br>if (!empty($_POST['languages'])){<br>echo "您选择的语言为:";<br>//处理用户选择兴趣的checkbox按钮产生的数组<br>foreach ($_POST['languages'] as $lang){<br>echo $lang. " ";<br>}<br>} else {<br>echo "您没有输入任何兴趣爱好";<br>}<br>if (!empty($_POST['develop_ide'])){<br>echo "您使用的开发工具为:";<br>//处理用户多选开发工具菜单产生的数组<br>foreach ($_POST['develop_ide'] as $ide){<br>echo $ide. " ";<br>}<br>} else {<br>echo "您没有选择开发工具";<br>}<br>echo "您的自我介绍: ".nl2br($_POST['intro'])."<br>";//nl2br(),在字符串中的每个新行 (n) 之前插入 HTML 换行符 (<br>)<br>";<br>echo "网页隐藏值(通过hidden标签值传递): ".$_POST['from']."<br>";<br>}<br>?> Copy after login |

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