How to validate all rows in a table using PHP


adapar
26/4/2016 6:52 am
HOME ยป Web Development

below is the script where i am trying to validate if the same name, id and email exists in a table, the problem is that even if i add a new input for each field i still get a "data already exist", how do i fix this issue, also how to validate using regular expression for each fields..for id i need three letters and 3 numbers using regular expression

if(isset($_POST['register'])){

//Retrieve the field values from our registration form.
$name = !empty($_POST['name']) ? trim($_POST['name']) : null;
$ccode = !empty($_POST['id']) ? trim($_POST['id']) : null;
$email = !empty($_POST['email']) ? trim($_POST['email']) : null;

$sql = "SELECT COUNT(*) AS num FROM users";
$stmt = $pdo->prepare($sql);


$stmt->bindValue(':name', $name);
$stmt->bindValue(':id', $id);
$stmt->bindValue(':email', $email);

$stmt->execute();

$row = $stmt->fetch(PDO::FETCH_ASSOC);


if($row['num'] > 0){
die('The Data already exists!');
}

else{

$sql = "INSERT INTO users (name, id, email) VALUES (:name, :id,  
:email)";
$stmt = $pdo->prepare($sql);


$stmt->bindValue(':name', $name);
$stmt->bindValue(':id', $id);
$stmt->bindValue(':email', $email);


$result = $stmt->execute();


if($result){
echo 'User aadded successfully!';
}
} 
}


<form action="sign.php" method="post">
<label for="name">Name</label>
<input type="text" id="name" name="name" required><br>
<label for="id">id</label>
<input type="text" id="" name="id" required><br>
<label for="email">Email</label>
<input type="email" id="email" name="email" required><br>
<input type="submit" name="register" value=" Click to
Add"></button>
</form>

and how do i validate if the fields have same name., for example i have 3 input fields, in the first field i enter the name of a person and in the second or third field if i enter the same name an error should display when i click the submit button, can it be done using a for loop to check each field if it contains the same name


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