表单验证不为空实例

作者: 关于计算机  发布:2019-09-26

php教程 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。

# sendmsg.php
<?php
require "func.php";
if ($b1) {
    if (is_user_exits($fromname) and check_user_password($fromname,$password)) {
        sendmsg();
        echo "成功!<br><form method="POST"><input type="button" value=" 关闭窗口 " name="B1" onclick="window.close()"></form>";
    }
    else {
        $founderr=1;
        echo "用户名/密码错误!";
    }
}
else {
?>
<html>
<head>
<title>发送留言</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link rel="stylesheet" type="text/css" href="css/index.css">
</head>

<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>

<body bgcolor="#eeeeee">
<form method="post" action="<?php echo $php_self;?>">
  <table width="98%" border="1" cellspacing="0" cellpadding="0" bordercolorlight="#000000" bordercolordark="#FFFFFF">
    <tr align="center">  
      <td colspan="2">给 <a href="userinfo.php?name=<?php echo $name;?>" target="_blank"><?php echo $name;?></a>  
        发送留言</td>
    </tr>
    <tr>  
      <td align="right" width="27%">您的用户名:</td>
      <td width="73%">  
        <input type="text" name="fromname" size="17" maxlength="16" value="<?php echo $jl_forum[name];?>">
        * </td>
    </tr>
    <tr>  
      <td align="right" width="27%">您的密码:</td>
      <td width="73%">  
        <input type="password" name="password" size="17" maxlength="16">
        * </td>
    </tr>
    <tr>  
      <td align="right" width="27%" valign="top">内容:</td>
      <td width="73%">  
        <textarea name="cont" wrap="VIRTUAL" cols="40" rows="3"></textarea>
        <input type="hidden" name="toname" value="<?php echo $name;?>">
        <br>
        <input type="submit" name="b1" value="发送">
        <input type="button" name="Submit" value="取消" onclick="window.close()">
      </td>
    </tr>
  </table>
</form>
</body>
</html>
<?php
}
?>
###############
# setup.php
# 此为初始化程序,只在上传后第一次执行,之后必须delete,以免出错
#################
<?php
require "func.php";
echo "<h1>初始化数据库</h1><br><br>";
echo "建立数据库连接...ok!<br>";
echo "建立表 boardinfo...";
$sql="CREATE TABLE boardinfo (name varchar(50) NOT NULL, chinesename varchar(50) NOT NULL)";
mysql_query($sql) or die("错误");
echo "ok!<br>";
echo "建立表 user...";
$sql="CREATE TABLE user (id int(11) NOT NULL auto_increment, name varchar(50) NOT NULL, sex varchar(6), realname varchar(20), password varchar(16) NOT NULL, address varchar(40), oicq varchar(10), homepage  varchar(50), score int(11), phone varchar(20), email varchar(50), regtime varchar(20), qm text,  slaveboard varchar(50), PRIMARY KEY (id))";
mysql_query($sql) or die("错误");
echo "ok!<br>";
echo "建立表 message... ";
$sql="create table message (id int(11) NOT NULL auto_increment,    name varchar(50), fromname varchar(50), writetime varchar(20), cont longtext, PRIMARY KEY(id))";
mysql_query($sql) or die("错误");
echo "ok!<br>";
echo "初始化版面 “个人电脑”...";
create_board_table('computer','个人电脑');
echo "ok!<br><br>";
echo "<h2>设置完毕!</h2>";
echo "<br><br>冷情疯子(电脑疯子)";
?>
## userinfo.php
<html>
<head>
<title>用户信息</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link rel="stylesheet" type="text/css" href="css/index.css">
</head>

这是个简单的验证函数

<body bgcolor="#FFFFFF" background="image/bg.gif">
<?php include "header.php";
if (!isset($name)) {
?>
<form method="post" action="<?php echo $php_self;?>">
  <table width="90%" border="1" cellspacing="0" cellpadding="1" align="center" bordercolorlight="#CCCCCC" bordercolordark="#FFFFFF">
    <tr align="center">  
      <td>请输入欲察看的用户名</td>
    </tr>
    <tr align="center">  
      <td>
        <input type="text" name="name" size="18" maxlength="16">
      </td>
    </tr>
    <tr align="center">  
      <td>
        <input type="submit" name="b1" value="察看资料">
      </td>
    </tr>
  </table>
</form>
<?php
}
else {
    require "func.php";
    if (is_user_exits($name)) {
        $sql="select * from user where name='$name'";
        $sql_result=mysql_query($sql);
        $row=mysql_fetch_array($sql_result);
?>
<br>
<table width="90%" border="1" cellspacing="0" cellpadding="1" align="center" bordercolorlight="#CCCCCC" bordercolordark="#FFFFFF">
  <tr>
    <td><b>详细资料</b></td>
  </tr>
  <tr>
    <td>用户名:<?php echo $row[name];?></td>
  </tr>
  <tr>
    <td>真实姓名:<?php echo $row[realname];?></td>
  </tr>
  <tr>
    <td>性别:<?php echo $row[sex];?></td>
  </tr>
  <tr>
    <td>地址:<?php echo $row[address];?></td>
  </tr>
  <tr>
    <td>电话:<?php echo $row[phone];?></td>
  </tr>
  <tr>
    <td>OICQ:<?php echo $row[oicq];?></td>
  </tr>
  <tr>
    <td>Email:<a href="mailto:<?php echo $row[email];?>"><?php echo $row[email];?></a></td>
  </tr>
  <tr>
    <td>主页:<a href="<?php echo $row[homepage];?>" target="_blank"><?php echo $row[homepage];?></a></td>
  </tr>
  <tr>
    <td>注册时间:<?php echo $row[regtime];?></td>
  </tr>
  <tr>
    <td>目前积分:<?php echo $row[score];?></td>
  </tr>
</table>
<br>
<?php
        }
        else {
            echo "请输入正确合法存在的用户名称";
        }
}
include "footer.php";?>
</body>
</html>
# viewmsg.php
<?php
require "func.php";
if (is_user_exits($jl_forum[name]) and check_user_password($jl_forum[name],$jl_forum[password])) {
    if (isset($job)) {
        if (is_this_user($id)) {
            delmsg($id);
        }
    }
    $name=$jl_forum[name];
    $sql="select * from message where name='$name'";
    $sql_result=mysql_query($sql);
    $sum=mysql_num_rows($sql_result);
?>
<html>
<head>
<title>察看留言</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link rel="stylesheet" type="text/css" href="css/index.css">
<script language="javascript">
function sendmsg(name){                window.open("sendmsg.php?name="+name,"","height=200,width=500,resizable=yes,scrollbars=yes,status=no,toolbar=no,menubar=no,location=no");
}
</script>
</head>

 

<body bgcolor="#FFFFFF" background="image/bg.gif">
<p>您目前共有 <b><?php echo $sum;?></b> 条留言</p>
<table width="98%" border="1" cellspacing="0" cellpadding="0" bordercolorlight="#CCCCCC" bordercolordark="#FFFFFF">
<?php
while ($sql_row=mysql_fetch_array($sql_result)) {
?>
  <tr bgcolor="#eeeeee">  
    <td><a href="javascript:sendmsg('<?php echo $sql_row[fromname];?>')"><?php echo $sql_row[fromname];?></a>  
      于 <?php echo $sql_row[writetime];?> <a href="<?php echo "$php_self?job=del&id=$sql_row[id]";?>">删除</a></td>
  </tr>
  <tr>
    <td><?php echo $sql_row[cont];?></td>
  </tr>
  <tr>
    <td> </td>
  </tr>
<?php
}
?>
</table>
<p>  </p>
</body>
</html>
<?php
}
else {
    show_error(4);
}
?> 

<?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;
    }
?>  

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