PHP表单验证之必填字段--w3school学习笔记 w3school离线手册 w3school tiy w3school手册下载-php教程-PHP中文网

PHP表单验证之必填字段--w3school学习笔记 w3school离线手册 w3school tiy w3school手册下载

php中文网

发布： 2016-07-29 08:53:26

原创

1608人浏览过

接上文，通过PHP验证必填字段
w3school教程,w3school下载,w3school手册,w3school.com,w3school官网,w3school在线,类似w3school,离线w3school,w3school电子书,w3school在线教程,www.w3school.com,w3school.com.cn,w3school离线手册,w3school tiy,w3school手册下载
验证规则：
字段–验证规则
姓名（name)–必填，必须包含字母和空格
邮件（email)–必需，必须包含有效的电子邮件地址，包括@和.
网址（website)–可选填，如果填则必须是有效的url
评论（comment）–可选填，多行输入字段
性别（gender）–必需，选择一项

html代码：

<code><span><!DOCTYPE html></span><span><<span>html</span>></span><span><<span>head</span>></span><span><<span>title</span>></span><span></<span>title</span>></span><span></<span>head</span>></span><span><<span>body</span>></span><span><<span>form</span><span>action</span>=<span>htmlspecialchars("<?php</span><span>echo</span> $<span>_SERVER</span>['<span>PHP_SELF</span>']; ?></span>") method='post'>
        姓名:<span><<span>input</span><span>type</span>=<span>'text'</span><span>name</span>=<span>'name'</span> /></span><span><<span>span</span><span>style</span>=<span>'color:red'</span>></span>*<span><span><?php</span><span>echo</span><span>$name_Err</span>; <span>?></span></span><span></<span>span</span>></span><span><<span>br</span>/></span>
        电邮:<span><<span>input</span><span>type</span>=<span>'text'</span><span>name</span>=<span>'email'</span> /></span><span><<span>span</span><span>style</span>=<span>'color:red'</span>></span>*<span><span><?php</span><span>echo</span><span>$email_Err</span>; <span>?></span></span><span></<span>span</span>></span><span><<span>br</span>/></span>
        网址:<span><<span>input</span><span>type</span>=<span>'text'</span><span>name</span>=<span>'website'</span> /></span><span><<span>br</span>/></span>
        评论:<span><<span>textarea</span><span>name</span>=<span>'comment'</span><span>rows</span>=<span>3</span><span>cols</span>=<span>21</span>></span><span></<span>textarea</span>></span><span><<span>br</span>/></span>
        性别:<span><<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>'gender'</span><span>value</span>=<span>0</span><span>checked</span>=<span>'checked'</span>/></span>女性
        <span><<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>'gender'</span><span>value</span>=<span>1</span> /></span>男性<span><<span>br</span>/></span><span><<span>input</span><span>type</span>=<span>'submit'</span><span>value</span>=<span>'提交'</span> /></span><span></<span>form</span>></span><span></<span>body</span>></span><span></<span>html</span>></span></code>

登录后复制

php代码

表单大师AI

一款基于自然语言处理技术的智能在线表单创建工具，可以帮助用户快速、高效地生成各类专业表单。

查看详情

<code><span><span><?php</span><span>$name</span>=<span>$email</span>=<span>$website</span>=<span>$comment</span>=<span>''</span>;
<span>$name_Err</span>=<span>$email_Err</span>=<span>''</span>;<span>//存储错误信息</span><span>if</span>(<span>$_SERVER</span>[<span>'REQUEST_METHOD'</span>]==<span>'POST'</span>){
    <span>if</span>(<span>$_POST</span>[<span>'name'</span>]==<span>''</span>){
        <span>$name_Err</span>=<span>'姓名不能为空'</span>;
    }<span>else</span>{
        <span>$name</span>=test_input(<span>$_POST</span>[<span>'name'</span>]);
    }
    <span>if</span>(<span>$_POST</span>[<span>'email'</span>]==<span>''</span>){
        <span>$email_Err</span>=<span>'邮箱不能为空'</span>;
    }<span>else</span>{
        <span>$email</span>=test_input(<span>$_POST</span>[<span>'email'</span>]);
    }
    <span>$website</span>=test_input(<span>$_POST</span>[<span>'website'</span>]);
    <span>$comment</span>=test_input(<span>$_POST</span>[<span>'comment'</span>]);
    <span>//由于我在html中将女性默认为选中，因此性别不用验证是否为空</span><span>$gender</span>=test_input(<span>$_POST</span>[<span>'gender'</span>]);
}

<span><span>function</span><span>test_input</span><span>(<span>$data</span>)</span>{</span><span>$data</span>=trim(<span>$data</span>);
    <span>$data</span>=stripslashes(<span>$data</span>);
    <span>$data</span>=htmlspecialchars(<span>$data</span>);
    <span>return</span><span>$data</span>;
}







<span>?></span></span></code>

登录后复制

').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });

以上就介绍了PHP表单验证之必填字段--w3school学习笔记，包括了w3school方面的内容，希望对PHP教程有兴趣的朋友有所帮助。