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1 <!DOCTYPE html> 2 <html> 3 <head> 4 <title>Test Code</title> 5 </head> 6 <body> 7 <h1> 8 My PHP Test 9 <h1> 10 <?php 11 echo "<h1><span style=\"color:#ff0000;\">2015/7/15 上午</span></h1>"; 12 echo "A Simple Form-data<br>"; 13 #<a href="/demo/test_get.php?subject=PHP&web=W3school.com.cn">测试 $GET</a> 14 ?> 15 <!--一个简单的HTML表单--> 16 <form action="<?php echo $_SERVER[‘PHP_SELF‘]?>" method="post"> 17 Name: 18 <input type="text" name="name"> 19 <br> 20 E-mail: 21 <input type="text" name="email"> 22 <br> 23 <input type="submit"> 24 </form> 25 <?php 26 $name=$_REQUEST[‘name‘]; 27 echo $name; 28 ?> 29 <?php 30 $nameErr = $emailErr = $genderErr = $websiteErr=""; 31 $name=$email=$gender=$comment=$website=""; 32 // 定义变量并设置为空值 33 34 if ($_SERVER["REQUEST_METHOD"] == "POST") { 35 if (empty($_POST["name"])) { 36 $nameErr = "姓名是必填的"; 37 } else { 38 $name = test_input($_POST["name"]); 39 if(!preg_match("/^[a-zA-Z]*$/",$name)){ 40 $nameErr="只允许字母和空格"; 41 } 42 } 43 44 if (empty($_POST["email"])) { 45 $emailErr = "电邮是必填的"; 46 } else { 47 $email = test_input($_POST["email"]); 48 //if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) 49 if(!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)){ 50 $emailErr="无效的 Email 格式 ！"; 51 } 52 } 53 54 if (empty($_POST["website"])) { 55 $website = ""; 56 } else { 57 $website = test_input($_POST["website"]); 58 if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) { 59 $websiteErr = "无效的 URL ！"; 60 } 61 } 62 63 if (empty($_POST["comment"])) { 64 $comment = ""; 65 } else { 66 $comment = test_input($_POST["comment"]); 67 } 68 69 if (empty($_POST["gender"])) { 70 $genderErr = "性别是必选的"; 71 } else { 72 $gender = test_input($_POST["gender"]); 73 } 74 } 75 76 function test_input($data) { 77 $data = trim($data); 78 $data = stripslashes($data); 79 $data = htmlspecialchars($data); 80 return $data; 81 } 82 ?> 83 <h2>表单验证实例</h2> 84 <span style="color:#FF0000;">*必填字段</span> 85 <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP-SELF"]);?>"> 86 <p> 姓名 : 87 <input type="text" name="name"> 88 <span style="color:#FF0000"> * <?php echo $nameErr;?></span> 89 <p> 电邮 : 90 <input type="text" name="email"> 91 <span style="color:#FF0000"> * <?php echo $emailErr;?></span> 92 <p> 网址 : 93 <input type="text" name="website"> 94 <span style="color:#FF0000"> * <?php echo $websiteErr;?></span> 95 <p> 评论 ： 96 <textarea name="comment" rows="5" cols="40"></textarea> 97 <p> 性别 : 98 <input type="radio" name = "gender" value="female"> 99 女性 100 <input type="radio" name = "gender" value="male"> 101 男性<span style="color:#FF0000"> *</span> 102 <p> 103 <input type="submit" name="submit" value="提交"> 104 </form> 105 <?php 106 echo "<h2>您的输入：</h2>"; 107 echo $name; 108 echo "<br>"; 109 echo $email; 110 echo "<br>"; 111 echo $website; 112 echo "<br>"; 113 echo $comment; 114 echo "<br>"; 115 echo $gender; 116 ?> 117 <!-- 118 （通过PHPtrim()函数）去除用户输入数据中不必要的字符（多余的空格、制表符、换行） 119 （通过 PHP stripslashes() 函数）删除用户输入数据中的反斜杠（\） 120 --> 121 122 </body> 123 </html>
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原文地址：http://www.cnblogs.com/zeze/p/php2.html
