我一直试图用PHP设置一个简单的联系表单，但它不起作用，我使用了本教程，第一次尝试时它起了作用，但当我尝试自定义它并添加一些字段时，它失败了。当我发送数据时，我认为这介于Ajax和PHP之间，但我真的不知道。

这是我正在使用的代码：

HTML
<form id="formulariocontacto">
        <fieldset>
            <input type="text" id="name" name="name" class="input-block-level" placeholder="Name">
            <input type="text" id="telefono" name="telefono" class="input-block-level" placeholder="Phone">
            <input type="text" id="email" name="email" class="input-block-level" placeholder="Email">
            <input type="text" id="direccion" name="direccion" class="input-block-level" placeholder="Adress">
            <textarea rows="14" id="comentario" name="comentario" class="input-block-level" placeholder="Comments"></textarea>
            <button type="submit" class="botonform" class="btn btn-warning pull-right">SEND</button>
        </fieldset>
    </form>  
jQuery
 $("#formulariocontacto").submit(function(e){
  e.preventDefault();
  var nombre = $("#name").val();
  var telefono = $("#telefono").val();
  var email = $("#email").val();
  var direccion = $("#direccion").val();
  var comentario = $("#comentario").val();
  var dataString = 'nombre=' + nombre + '&email=' + email + '&comentario=' + comentario + '&telefono' + telefono + '&direccion' + direccion;
  function isValidEmail(emailAddress) {
    var pattern = new RegExp(/^((([a-z]|'d|[!#'$%&''*'+'-'/='?'^_`{'|}~]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])+('.([a-z]|'d|[!#'$%&''*'+'-'/='?'^_`{'|}~]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])+)*)|(('x22)(((('x20|'x09)*('x0d'x0a))?('x20|'x09)+)?((['x01-'x08'x0b'x0c'x0e-'x1f'x7f]|'x21|['x23-'x5b]|['x5d-'x7e]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])|(''(['x01-'x09'x0b'x0c'x0d-'x7f]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF]))))*((('x20|'x09)*('x0d'x0a))?('x20|'x09)+)?('x22)))@((([a-z]|'d|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])|(([a-z]|'d|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])([a-z]|'d|-|'.|_|~|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])*([a-z]|'d|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])))'.)+(([a-z]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])|(([a-z]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])([a-z]|'d|-|'.|_|~|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])*([a-z]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])))'.?$/i);
    return pattern.test(emailAddress);
  };
  if (isValidEmail(email) && (comentario.length > 100) && (nombre.length > 1)){
    $.ajax({
    type: "POST",
    url: "procesar.php",
    data: dataString,
    success: function(){
      $('.exito').fadeIn(1000);
    }
    });
  } else{
    $('.error').fadeIn(1000);
  }
  return false;
});
PHP
<?php
// Email Submit
// Note: filter_var() requires PHP >= 5.2.0
if ( isset($_POST['email']) && isset($_POST['nombre']) && isset($_POST['comentario'])  ) {
$name_field=$_POST['nombre'];
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);
$telefono_field=$_POST['telefono'];
$direccion_field=$_POST['direccion'];
$mensaje_field=$_POST['comentario'];
$subject=.$_POST['nombre']" V&#237;a mysite.com";
$mensaje="Nombre: $name_field'n Email: $email_field'n Tel&#233;fono: $telefono_field'n Direcci&#243;n: $direccion_field'n Mensaje:'n $mensaje_field";
  // detect & prevent header injections
$test = "/(content-type|bcc:|cc:|to:)/i";
foreach ( $_POST as $key => $val ) {
if ( preg_match( $test, $val ) ) {
  exit;
}
}  
 //send email
 mail( "mymail@mysite.com", $subject, $mensaje, "From: " . $email );
}
?>

我试图通过添加一些额外的字段来制作一个更完整的消息，你可以在PHP 中看到var"$mensaje"