Ecrire du code PHP pour assurer que les données soumises utilisateur suivantes sont au format correct roll_Number, nom, email et phone_number

Question

Ecrire code PHP pour faire en sorte que les données soumises utilisateur suivantes sont au format correct

roll_Number,name,email and phone_Number 

if(isset($_POST['Submit'])){ 
    $roll_Number=$_POST['uroll']; 
    $name=$_POST['uname']; 
    $email=$_POST['uemail']; 
    $phone_Number=$_POST['uphone']; 
    echo $roll_Number; 

    if(filter_var($roll_Number,FILTER_VALIDATE_INT) && filter_var($email,FILTER_VALIDATE_EMAIL) && filter_var($phone_Number,FILTER_VALIDATE_INT)){ 
     echo "Valid data!!!"; 
     //establish a connection 
     $db=mysqli_connect('localhost','root',''); 

     //create database 
     $sql="CREAte database db_validate__2014"; 

     //create table 
     $sql.="create table studentInfo 
       (
        roll_Number INT primary key, 
        name VARCHAR(45) not null, 
        email varchar(45) null, 
        phone int not null 
       )"; 

     //insert data into table 

     $sql.="insert into studentInfo 
      values('$roll_Number','$name','$email','$phone_Number')"; 
     $sqlres=mysqli_multi_query($db,$sql); 

     if($sqlres){ 
      echo "Operation successful!!!"; 
     }else{ 
      echo "Operation failed!!!"; 
     } 

     //close the connection 
     mysqli_close($db); 



    }else{ 
     echo "Invalid data enter again!!!"; 
    } 
}else{ 
    echo "<form action='' method='post' > 
     <table> 
      <tr> 
       <td> 
        roll_Number:<input type='number' name='uroll' > 
       </td> 
      </tr> 

      <tr> 
       <td> 
        name:<input type='text' name='uname' > 
       </td> 
      </tr> 

      <tr> 
       <td> 
        Email:<input type='text' name='uemail' >  
       </td> 
      </tr> 
      <tr> 
       <td> 
        phone_Number:<input type='number' name='uphone' > 
       </td> 
      </tr> 

      <tr> 
       <td> 
        <input type='Submit' name='Submit' >  
       </td> 
      </tr> 
     </table> 
     </form>"; 
} 

Answer 1

Je pense que vous besoin de placer ce $ db = mysqli_connect ('localhost', 'root', '');

 //create database 
     $sql="CREAte database db_validate__2014"; 

     //create table 
     $sql.="create table studentInfo 
       (
        roll_Number INT primary key, 
        name VARCHAR(45) not null, 
        email varchar(45) null, 
        phone int not null 
       )"; 

ci-dessus si ce (isset ($ _ POST [ 'Soumettre'])) {line