php trim() 表单验证不为空实例 -php手册-php.cn

Home

php教程

php手册

php trim() 表单验证不为空实例

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 25, 2016 pm 04:46 PM

phptrim()form validation

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 id="contact-nbsp-information">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&#39; 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

 class="brush: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&#39;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, $data) != 1) { 
	            return "the &#39;$desc&#39; field isn&#39;t valid!"; 
	        } 
	        return true; 
	    }

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Best Graphic Settings

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Assassin's Creed Shadows: Seashell Riddle Solution

2 weeks agoByDDD

R.E.P.O. How to Fix Audio if You Can't Hear Anyone

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

WWE 2K25: How To Unlock Everything In MyRise

4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software