Form Required in Php

Page Index

PHP Introduction

Control Structures

Php Forms

Php Advanced

PHP Form Required

From the validation rules table on the previous page, we see that the "Name", "E-mail", and "Gender" fields are required. These fields cannot be empty and must be filled out in the HTML form.

Field	Validation Rules
Name	Required. + Must only contain letters and whitespace
E-mail	Required. + Must contain a valid email address (with @ and .)
Website	Optional. If present, it must contain a valid URL
Comment	Optional. Multi-line input field (textarea)
Gender	Required. Must select one

    <!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"]);
      }
      
      if (empty($_POST["email"])) {
        $emailErr = "Email is required";
      } else {
        $email = test_input($_POST["email"]);
      }
        
      if (empty($_POST["website"])) {
        $website = "";
      } else {
        $website = test_input($_POST["website"]);
      }
    
      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">
      <span class="error">* <?php echo $nameErr;?></span>
      <br><br>
      E-mail: <input type="text" name="email">
      <span class="error">* <?php echo $emailErr;?></span>
      <br><br>
      Website: <input type="text" name="website">
      <span class="error"><?php echo $websiteErr;?></span>
      <br><br>
      Comment:
      <textarea name="comment" rows="5" cols="40"></textarea>
      <br><br>
      Gender:
      <input type="radio" name="gender" value="female">Female
      <input type="radio" name="gender" value="male">Male
      <input type="radio" name="gender" value="other">Other
      <span class="error">* <?php echo $genderErr;?></span>
      <br><br>
      <input type="submit" name="submit" value="Submit">  
    </form>
    
    <?php
    echo "<h2>Your Input:</h2>";
    echo $name;
    echo "<br>";
    echo $email;
    echo "<br>";
    echo $website;
    echo "<br>";
    echo $comment;
    echo "<br>";
    echo $gender;
    ?>
    
    </body>
    </html>

In next chapter we have a big complete form with database store

Form Validation

Form Complete

Share this page on :