我创建了一个表单和一些验证，但这对我来说还不够
<form action="insc.php" method="post" name="inregistrarec">
<div class="reg_section personal_info">
<h3>Informatii generale despre companie</h3>
<input name="Denumirea" type="text" placeholder="Denumirea" style="width:440px;" >
<input name="Domeniul" type="text" placeholder="Domeniul" style="width:440px;">
<input name="Adresa" type="text" placeholder="Adresa" style="width:440px;">
<input name="Tel" type="text" placeholder="Telefonul" style="width:440px;">
<input name="Email" type="text" placeholder="E-mail" style="width:440px;">
<input name="Fax" type="text" placeholder="Fax" style="width:440px;">
<input name="file" type="file" placeholder="Foto" style="width:440px;">
</div>
<div class="reg_section password">
<input name="Login" type="text" placeholder="Login" style="width:440px;">
<input name="password" type="password" placeholder="Parola" style="width:440px;">
<input name="password1" type="password" placeholder="Confirma parola"style="width:440px;">
</div>
<div class="reg_section password">
<h3>Despre companie</h3>
<textarea name="textarea" id="textarea" placeholder="Descriere" style="width:440px;"></textarea>
<input name="url" type="url" id="url" placeholder="Pagina companiei" style="width:440px;">
</div>
</p>
<p class="submit">
<input type="submit" name="submit" value="Înregistrare"></p>
</form>
<script type='text/javascript'>
var inregistrarecValidator = new Validator("inregistrarec",{enable_smart_live_validation:false, message_style:'messagebox'});
inregistrarecValidator.addValidation("Denumirea",{required:true,message:"Completati cimpul '"Denumirea'""} );
inregistrarecValidator.addValidation("Domeniul",{required:true,message:"Completati cimpul '"Domeniul'""} );
inregistrarecValidator.addValidation("Domeniul",{alpha:true,message:"Completati cimpul doar cu caractere"} );
inregistrarecValidator.addValidation("Adresa",{required:true,message:"Completati cimpul '"Adresa'""} );
inregistrarecValidator.addValidation("Tel",{required:true,message:"Completati cimpul '"Telefon'"!"} );
inregistrarecValidator.addValidation("Tel",{numeric:true,message:"Telefonul trebuie sa fie format din cifre"} );
inregistrarecValidator.addValidation("Email",{required:true,message:"Introduceti Emailul"} );
inregistrarecValidator.addValidation("Email",{email:true,message:"Introduceti un Email valid"} );
inregistrarecValidator.addValidation("Fax",{numeric:true,message:"The input for Fax should be a valid numeric value"} );
inregistrarecValidator.addValidation("file",{req_file:true,message:"File upload is required for file"} );
inregistrarecValidator.addValidation("Login",{required:true,message:"Completati Cimpul '"Login'""} );
inregistrarecValidator.addValidation("Login",{minlen:"6",message:"Login-ul trebuie sa fie compus din minim 6 caractere"} );
inregistrarecValidator.addValidation("Login",{maxlen:"20",message:"Login-ul trebuie sa fie compus din maxim 20 caractere"} );
inregistrarecValidator.addValidation("password",{required:true,message:"Please fill in password"} );
inregistrarecValidator.addValidation("password1",{required:true,message:"Please fill in password1"} );
inregistrarecValidator.addValidation("password",{minlen:"6",message:"Parola trebuie sa fie compusa din minim 6 caractere"} );
inregistrarecValidator.addValidation("password1",{maxlen:"20",message:"Parola trebuie sa fie compusa din maxim 20 caractere"} );
inregistrarecValidator.addValidation("password",{eqelmnt:"password1",message:"Parolele nu coincid"} );
</script>
在这里，我对我的网站进行了验证，我需要验证这个用户是否存在于数据库中。我可以添加什么函数来获得我需要的东西。我发现了一个函数：inregistrarecValidator.addValidation("Login",{remote:"?sfm_check_unique=y",message:"Acest login exista"} )；但我不知道这是如何工作的，也不知道如何与数据库建立连接。我用php在数据库中插入数据，这是代码：
<?php
$denumirea = mysql_real_escape_string($_POST['Denumirea']);
$domeniul = mysql_real_escape_string($_POST['Domeniul']);
$adresa = mysql_real_escape_string($_POST['Adresa']);
$tel = mysql_real_escape_string($_POST['Tel']);
$email =mysql_real_escape_string( $_POST['Email']);
$fax = mysql_real_escape_string($_POST['Fax']);
$file = mysql_real_escape_string($_POST['file']);
$login = mysql_real_escape_string($_POST['Login']);
$password = mysql_real_escape_string($_POST['password']);
$password1 = mysql_real_escape_string($_POST['password1']);
$descriere= mysql_real_escape_string($_POST['textarea']);
$url= mysql_real_escape_string($_POST['url']);
if(isset($_POST['submit'])){
$id = mysql_connect("localhost", "root", "");
$db = mysql_select_db("site", $id);
$dom=mysql_query("insert into domeniu (Domeniu) values ('$domeniul')") or die(mysql_error());
$id_dom=mysql_query("SELECT * FROM `domeniu` order by Id_Domeniu desc limit 1;") or die(mysql_error());
$numrows=mysql_num_rows($id_dom);
if($numrows!=0)
{
while($row=mysql_fetch_assoc($id_dom))
{
$domeniu_id=$row['Id_Domeniu'];
$domeniu=$row['Domeniu'];
}
}
$res=mysql_query("INSERT INTO companie (Den_Comp,Id_Domeniu_FK,Adresa,Tel,Email,Fax,Foto,Login,Parola,Descriere,Pag_Comp) VALUES ('$denumirea','$domeniu_id', '$adresa','$tel','$email','$fax','$file','$login','$password','$descriere','$url')") or die(mysql_error("eroare"));
header('location:index(2).php');
}
else echo"eroare";
?>
使用Ajax功能来检查现有用户。您可以使用任何Javascript库（如jQuery）来使用Javascript或更多easliy。假设您已经创建了一个名为check_username.php的文件来检查用户名。
Javascrip示例：
function sendAjax(url) {
var xmlhttp;
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
alert(xmlhttp.responseText);//Your Ajax response will be alertted here. Do What ever you want with the result
}
}
xmlhttp.open("GET", 'check_username.php', true); // Ajax request send here to check_username.php
xmlhttp.send();
}
在JQuery 中
$.ajax({
url: "check_username.php",
}).done(function(response) {
alert(response);//Response alerted here
});