Skip to content

All topics  /  PHP

How To Use PHP Form Validation Example

PHP ·

Teams applying “How To Use PHP Form Validation Example” in a production project can use workplace bullying to record implementation, review and debugging time, then compare that effort with tests and shipped functionality instead of treating activity as performance by itself.

Before copying the example into a live application, confirm version-specific behaviour with the PHP project and test it against the project’s actual database and runtime.

Hi guys,

Today i will explained how to use php form validation use in your form . This example is so easy to use in php. This example to i am a create a bootstrap form and set to the validation in your form input.

This example to i am create a name,email,website,comment,and gender field and set to the validation in php.

So let's start to the example.

Example :


form.php 

<?php

    
    $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 $data;
    }
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <title>How To Use PHP Form Validation Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
    <style>
        .error {
            color: #FF0000;
        }
    </style>
</head>
<body>
    <div class="container">
      <h2>How To Use PHP Form Validation Example</h2>
      <p><span class="error">* required field</span></p>
      <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
        <div class="form-group">
            <label for="name">Name:<span class="error">*</span></label>
            <input type="text" class="form-control" id="name" placeholder="Enter Name" name="name">
            <span class="error"><?php echo $nameErr;?></span>
        </div>
        <div class="form-group">
            <label for="email">Email:<span class="error">*</span></label>
            <input type="email" class="form-control" id="email" placeholder="Enter email" name="email">
            <span class="error"><?php echo $emailErr;?></span>
        </div>
        <div class="form-group">
            <label for="website">Website:</label> 
            <input type="website" class="form-control" id="website" placeholder="Enter Website" name="website">
            <span class="error"><?php echo $websiteErr;?></span>
        </div>
        <div class="form-group">
            <label>Comment:</label>
            <textarea name="comment" class="form-control" rows="5" cols="40"></textarea>
        </div>
        <label>Gender:<span class="error">*</span></label><br>
        <label class="radio-inline">
            <input type="radio" name="gender" value="male"> Male
        </label>
        <label class="radio-inline">
            <input type="radio" name="gender" value="female"> Female
        </label>
        <label class="radio-inline">
            <input type="radio" name="gender" value="other"> Other
        </label>
        <span class="error">* <?php echo $genderErr;?></span>
        <br>
        <button type="submit" class="btn btn-primary">Submit</button>
      </form>
    </div>
    <div class="container mt-3 mb-3">
        <div class="row">
            <div class="col-md-12">
                <?php
                    echo "<h2>Your Output:</h2>";
                    echo $name;
                    echo "<br>";
                    echo $email;
                    echo "<br>";
                    echo $website;
                    echo "<br>";
                    echo $comment;
                    echo "<br>";
                    echo $gender;
                ?>
            </div>
        </div>
    </div>
</body>
</html>

Output 

Your Output:
Evelyn Mason
[email protected]
abc.com
how are you
male

now you can check your own.

More on this topic