PHP基础篇-表单完整实例

来源：互联网发布：淘宝客cms系统编辑：程序博客网时间：2024/05/16 12:40
学习资料来源于：菜鸟教程
 <!DOCTYPE HTML><html><head><style>.error {color: #FF0000;}</style></head><body><?php// define variables and set to empty values$nameErr = $emailErr = $genderErr = $websiteErr = "";$name = $email = $gender = $comment = $website = "";if ($_SERVER["REQUEST_METHOD"] == "POST"){   if (empty($_POST["name"]))     {$nameErr = "Name is required";}   else     {     $name = test_input($_POST["name"]);     // check if name only contains letters and whitespace     if (!preg_match("/^[a-zA-Z ]*$/",$name))       {       $nameErr = "Only letters and white space allowed";       }     }     if (empty($_POST["email"]))     {$emailErr = "Email is required";}   else     {     $email = test_input($_POST["email"]);     // check if e-mail address syntax is valid     if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email))       {       $emailErr = "Invalid email format";       }     }       if (empty($_POST["website"]))     {$website = "";}   else     {     $website = test_input($_POST["website"]);     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website))       {       $websiteErr = "Invalid URL";       }     }   if (empty($_POST["comment"]))     {$comment = "";}   else     {$comment = test_input($_POST["comment"]);}   if (empty($_POST["gender"]))     {$genderErr = "Gender is required";}   else     {$gender = test_input($_POST["gender"]);}}function test_input($data){     $data = trim($data);     $data = stripslashes($data);     $data = htmlspecialchars($data);     return $data;}?><h2>PHP Form Validation Example</h2><p><span class="error">* required field.</span></p><form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">   Name: <input type="text" name="name" value="<?php echo $name;?>">   <span class="error">* <?php echo $nameErr;?></span>   <br><br>   E-mail: <input type="text" name="email" value="<?php echo $email;?>">   <span class="error">* <?php echo $emailErr;?></span>   <br><br>   Website: <input type="text" name="website" value="<?php echo $website;?>">   <span class="error"><?php echo $websiteErr;?></span>   <br><br>   Comment: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>   <br><br>   Gender:   <input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?>  value="female">Female   <input type="radio" name="gender" <?php if (isset($gender) && $gender=="male") echo "checked";?>  value="male">Male   <span class="error">* <?php echo $genderErr;?></span>   <br><br>   <input type="submit" name="submit" value="Submit"></form><?phpecho "<h2>Your Input:</h2>";echo $name;echo "<br>";echo $email;echo "<br>";echo $website;echo "<br>";echo $comment;echo "<br>";echo $gender;?></body></html>
0 0