php trim() 表单验证不为空实例,应该算是入门级的实例了,告诉你如何利用trim函数来删除空格然后判断用户提交的数据是否为空.
- <html>
- <body>
- <form method="post" action="formerrorcheck.php">
- <h1>contact information</h1>
- <table>
- <tr>
- <td><b>nickname:</b></td>
- <td><input type="text" name="nickname"></td>
- </tr>
- <tr>
- <td>title:</td>
- <td><input type="text" name="title"></td>
- </tr>
- <tr>
- <td><b>first name:</b></td>
- <td><input type="text" name="firstname"></td>
- </tr>
- <tr>
- <td>middle name:</td>
- <td><input type="text" name="middlename"></td>
- </tr>
- <tr>
- <td><b>last name:</b></td>
- <td><input type="text" name="lastname"></td>
- </tr>
- <tr>
- <td><b>primary email:</b></td>
- <td><input type="text" name="email"></td>
- <td width="20"> </td>
- <td>secondary email:</td>
- <td><input type="text" name="secondaryemail"></td>
- </tr>
- <tr>
- <td>company name:</td>
- <td><input type="text" name="companyname"></td>
- </tr>
- <tr>
- <td>office address:</td>
- <td><input type="text" name="officeaddres1"></td>
- <td width="20"> </td>
- <td>home address:</td>
- <td><input type="text" name="homeaddress"></td>
- </tr>
- <tr>
- <td></td>
- <td><input type="text" name="officeaddress2"></td>
- </tr>
- <tr>
- <td>city:</td>
- <td><input type="text" name="officecity"></td>
- <td width="20"> </td>
- <td> </td>
- <td><input type="text" name="homecity"></td>
- </tr>
- <tr>
- <td>state:</td>
- <td><input type="text" name="officestate"></td>
- <td width="20"> </td>
- <td> </td>
- <td><input type="text" name="homestate"></td>
- </tr>
- <tr>
- <td>zip:</td>
- <td><input type="text" name="officezip"></td>
- <td width="20"> </td>
- <td> </td>
- <td><input type="text" name="homezip"></td>
- </tr>
- <tr>
- <td>phone:</td>
- <td><input type="text" name="officephone"></td>
- <td width="20"> </td>
- <td> </td>
- <td><input type="text" name="homephone"></td>
- </tr>
- <tr>
- <td>birthday:</td>
- <td><input type="text" name="birthday"></td>
- </tr>
- <tr>
- <td>spouse name:</td>
- <td><input type="text" name="spousename"></td>
- <td width="20"> </td>
- <td>childrens' names:</td>
- <td><input type="text" name="children"></td>
- </tr>
- <tr>
- <td>anniversary:</td>
- <td><input type="text" name="anniversary"></td>
- </tr>
- </table>
- <br>
- <br>
- <br>
- <input type="submit" value="submit">
- <br>
- <br>
- <input type="reset" value="clear the form">
- </form>
- </body>
- </html>
formerrorcheck.php
- <html>
- <body>
- <?php
- $errors=0;
- if (!trim($nickname)) {
- echo "<br><b>nickname</b> is required.";
- $errors++;
- }
- if (!trim($firstname)) {
- echo "<br><b>first name</b> is required.";
- $errors++;
- }
- if (!trim($lastname)) {
- echo "<br><b>last name</b> is required.";
- $errors++;
- }
- if (!trim($email)) {
- echo "<br><b>primary email address</b> is required.";
- $errors++;
- }
- if ($errors > 0)
- echo "<br><br><br>please use your browser's back button " .
- "to return to the form, and correct error(s)";
- ?>
- </body>
- </html>
这是个简单的验证函数:
- <?php
- function phone_validate($data, $desc) {
- $regex = "/^([2-9][0-9]{2})[2-9][0-9]{2}-[0-9]{4}/i";
- if(preg_match($regex, $data) != 1) {
- return "the '$desc' field isn't valid!";
- }
- return true;
- }
- ?>
波比源码 – 精品源码模版分享 | www.bobi11.com
1. 本站所有资源来源于用户上传和网络,如有侵权请邮件联系站长!
2. 分享目的仅供大家学习和交流,您必须在下载后24小时内删除!
3. 不得使用于非法商业用途,不得违反国家法律。否则后果自负!
4. 本站提供的源码、模板、插件等等其他资源,都不包含技术服务请大家谅解!
5. 如有链接无法下载、失效或广告,请联系管理员处理!
6. 本站资源售价只是赞助,收取费用仅维持本站的日常运营所需!
7. 本站源码并不保证全部能正常使用,仅供有技术基础的人学习研究,请谨慎下载
8. 如遇到加密压缩包,请使用WINRAR解压,如遇到无法解压的请联系管理员!
波比源码 » php trim() 表单验证不为空实例
波比源码 » php trim() 表单验证不为空实例