PHP 注册表单

2025年5月3日 | 阅读 6 分钟

在 PHP 中，注册表单是一个字段列表，用户可以在其中输入数据并提交。在需要注册的任何情况下都很有用。

例如，各种公司使用注册表单来为客户注册服务或其他项目。

在学校和学院中，注册表单用于为课程注册学生，学生可以在其中填写他们的联系信息、学术历史等。

让我们来看一下 PHP 中的各种注册表单示例

示例 1

<!DOCTYPE html>  
<html lang="en">  
<head>  
  <!-- Meta tags for responsiveness and character encoding -->
  <meta charset="utf-8">  
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">  
  <title>PHP Registration Form</title>  

  <!-- Internal CSS for styling the form -->
  <style>  
  input[type=radio], input[type=checkbox] {
    width: 20px;
  }

  * {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
  }

  body {
    margin: 50px auto;
    text-align: center;
    width: 800px;
  }

  input[type=reset], input[type=submit] {
    border: 3px solid;
    border-radius: 2px;
    display: block;
    font-size: 1em;
    font-weight: bold;
    margin: 1em auto;
    padding: 1em 4em;
    position: relative;
    text-transform: uppercase;
  }

  input[type=reset]::before,
  input[type=submit]::before {
    background: #fff;
    content: '';
    position: absolute;
    z-index: -1;
  }

  input[type=reset]:hover,
  input[type=submit]:hover {
    color: #1A33FF;
  }

  input {
    border: 2px solid #ccc;
    font-size: 1rem;
    font-weight: 100;
    font-family: 'Lato';
    padding: 10px;
  }

  form {
    margin: 20px auto;
    padding: 20px;
    border: 5px solid #ccc;
    background: #8bb2eafa;
  }

  h1 {
    font-family: sans-serif;
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    letter-spacing: 3px;
    color: hotpink;
    text-transform: uppercase;
  }
  </style>  
</head>  
<body>  

<h1> PHP Registration Form Example </h1>  

<!-- Registration form with POST method and file upload support -->
<form method="post" enctype="multipart/form-data" action="#">  
<table>  
  <!-- Row to display message after form submission -->
  <tr>  
    <td colspan="2"> <?php echo @$msg; ?> </td>  
  </tr>  

  <!-- Name input field -->
  <tr>  
    <td><b>Enter your Name</b></td>  
    <td><input type="text" placeholder="Enter name" name="n" pattern="[a-zA-Z ]*" required /></td>  
  </tr>  

  <!-- Email input field -->
  <tr>  
    <td><b>Enter your Email</b></td>  
    <td><input type="email" name="e" placeholder="Enter Email" /></td>  
  </tr>  

  <!-- Password input field -->
  <tr>  
    <td><b>Enter your Password</b></td>  
    <td><input type="password" name="p" placeholder="Enter Password" /></td>  
  </tr>  

  <!-- Address textarea -->
  <tr>  
    <td><b>Enter your Address</b></td>  
    <td><textarea name="add">Enter Address</textarea></td>  
  </tr>  

  <!-- Mobile number input field -->
  <tr>  
    <td><b>Enter your Mobile Number</b></td>  
    <td><input type="text" pattern="[0-9]*" name="m" placeholder="Enter number" /></td>  
  </tr>  

  <!-- Gender radio buttons -->
  <tr>  
    <td><b>Select your Gender</b></td>  
    <td>  
      Male <input type="radio" name="g" value="m" />  
      Female <input type="radio" name="g" value="f" />  
    </td>  
  </tr>  

  <!-- Hobbies checkboxes -->
  <tr>  
    <td><b>Choose your Hobbies</b></td>  
    <td>  
      Cricket <input type="checkbox" value="cricket" name="hobb[]" />  
      Singing <input type="checkbox" value="singing" name="hobb[]" />  
      Dancing <input type="checkbox" value="dancing" name="hobb[]" />  
    </td>  
  </tr>  

  <!-- Profile picture upload -->
  <tr>  
    <td><b>Select your Profile Pic</b></td>  
    <td><input type="file" name="pic" /></td>  
  </tr>  

  <!-- Date of Birth dropdowns -->
  <tr>  
    <td><b>Select your Date of Birth</b></td>  
    <td>  
      <select name="mm">  
        <option value="">Month</option>  
        <?php for($i=1;$i<=12;$i++) echo "<option value ='$i'>$i</option>"; ?>  
      </select>  
      <select name="dd">  
        <option value="">Date</option>  
        <?php for($i=1;$i<=31;$i++) echo "<option value ='$i'>$i</option>"; ?>  
      </select>  
      <select name="yy">  
        <option value="">Year</option>  
        <?php for($i=1900;$i<=2015;$i++) echo "<option value ='$i'>$i</option>"; ?>  
      </select>  
    </td>  
  </tr>  

  <!-- Submit and Reset buttons -->
  <tr>  
    <td colspan="2" align="center">  
      <input type="submit" name="save" value="Register" />  
      <input type="reset" value="Reset" />  
    </td>  
  </tr>  
</table>  
</form>  
</body>  
</html>  

<!-- PHP Backend Logic -->
<?php  
// Extract all POST values to variables
extract($_POST);  

// Check if the form has been submitted
if(isset($save))  
{  
  // Combine DOB into one string
  $dob = $yy . "-" . $mm . "-" . $dd;  

  // Combine hobbies array into a comma-separated string
  $h = implode(",", $hobb);  

  // Get uploaded file name
  $img = $_FILES['pic']['name'];  

  // Simulate user existence check (placeholder)
  if($return)  // You should define $return based on email check logic
  {  
    // Email already exists
    $msg = "<font color='red'>" . ucfirst($e) . " already exists, choose another email</font>";  
  }  
  else  
  {  
    // Success message
    $msg = "<font color='blue'>Your data has been saved</font>";  
  }  
}  
?>  

输出

填写信息并点击提交按钮之前

填写信息并点击提交按钮之后

示例 2

<!DOCTYPE html> <!-- Corrected from <! Doctype html> to proper <!DOCTYPE html> -->
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <title>PHP Registration Form Example</title>

  <style>
    /* Style for error messages */
    .error {
      color: white;
      font-family: lato;
      background: yellowgreen;
      display: inline-block;
      padding: 2px 10px;
    }

    /* Reset and basic styling */
    * {
      padding: 0;
      margin: 0;
      box-sizing: border-box;
    }

    body {
      margin: 50px auto;
      text-align: center;
      width: 800px;
    }

    h1 {
      font-family: sans-serif;
      font-size: 2rem;
      font-weight: bold;
      text-align: center;
      letter-spacing: 3px;
      color: hotpink;
      text-transform: uppercase;
    }

    label {
      width: 150px;
      display: inline-block;
      text-align: left;
      font-size: 1.5rem;
      font-family: 'Lato';
    }

    input {
      border: 2px solid #ccc;
      font-size: 1.5rem;
      font-weight: 100;
      font-family: 'Lato';
      padding: 10px;
    }

    form {
      margin: 25px auto;
      padding: 20px;
      border: 5px solid #ccc;
      width: 500px;
      background: #f3e7e9;
    }

    div.form-element {
      margin: 20px 0;
    }

    /* Styling for submit button */
    input[type=submit] {
      border: 3px solid;
      border-radius: 2px;
      display: block;
      font-size: 1em;
      font-weight: bold;
      margin: 1em auto;
      padding: 1em 4em;
      position: relative;
      text-transform: uppercase;
      background: white; /* Added missing background */
      cursor: pointer;
    }

    input[type=submit]:hover {
      color: #1A33FF;
    }
  </style>
</head>

<body>

<?php
// Initialize error variables
$nameErr = $emailErr = $genderErr = $websiteErr = "";
// Initialize form field variables
$name = $email = $gender = $comment = $website = "";

// Process form when it is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {

  // Validate Name
  if (empty($_POST["name"])) {
    $nameErr = "Name Field is required";
  } else {
    $name = test_input($_POST["name"]);
    // Only allow letters and whitespace
    if (!preg_match("/^[a-zA-Z-' ]*$/", $name)) {
      $nameErr = "Only letters and white space allowed";
    }
  }

  // Validate Email
  if (empty($_POST["email"])) {
    $emailErr = "Email field is required";
  } else {
    $email = test_input($_POST["email"]);
    // Check if e-mail address is well-formed
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
      $emailErr = "Invalid email format";
    }
  }

  // Validate Website (here you are using it for the phone number based on the label, but keeping the variable name as website)
  if (empty($_POST["website"])) {
    $website = "";
  } else {
    $website = test_input($_POST["website"]);
    // Website validation regex (still checking URL; you might want to adapt this if it's truly for numbers)
    if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i", $website)) {
      $websiteErr = "Invalid URL";
    }
  }

  // Comment is optional
  if (empty($_POST["comment"])) {
    $comment = "";
  } else {
    $comment = test_input($_POST["comment"]);
  }

  // Validate Gender
  if (empty($_POST["gender"])) {
    $genderErr = "Gender is required";
  } else {
    $gender = test_input($_POST["gender"]);
  }
}

// Function to sanitize user input
function test_input($data) {
  $data = trim($data);
  $data = stripslashes($data);
  $data = htmlspecialchars($data);
  return $data;
}
?>

<h1>PHP Registration Form Example</h1>

<!-- Registration Form -->
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">

  <b>Enter Name:</b> 
  <input type="text" name="name" value="<?php echo $name;?>">
  <span class="error">* <?php echo $nameErr;?></span>
  <br><br>

  <b>Enter E-mail:</b> 
  <input type="text" name="email" value="<?php echo $email;?>">
  <span class="error">* <?php echo $emailErr;?></span>
  <br><br>

  <b>Enter Number:</b> <!-- Note: Here you label it 'Number', but still validate it like Website -->
  <input type="text" name="website" value="<?php echo $website;?>">
  <span class="error">* <?php echo $websiteErr;?></span>
  <br><br>

  <b>Message:</b> 
  <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
  <br><br>

  <b>Select Gender:</b>  
  <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) && $gender=="male") echo "checked";?> value="male"> Male
  <input type="radio" name="gender" <?php if (isset($gender) && $gender=="other") echo "checked";?> value="other"> Other
  <span class="error">* <?php echo $genderErr;?></span>
  <br><br>

  <input type="submit" name="submit" value="Register">

</form>

<!-- Display Submitted Input -->
<?php
echo "<h2>Your Input:</h2>";
echo "Name: " . $name . "<br>";
echo "Email: " . $email . "<br>";
echo "Website: " . $website . "<br>";
echo "Comment: " . $comment . "<br>";
echo "Gender: " . $gender . "<br>";
?>

</body>
</html>

输出

填写信息之前

填写信息并点击提交按钮之后

下一主题PHP 三元运算符

PHP 注册表单

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