html form class

Is there any html form class(text box) that does not allow null values. The inputted data is to be stored in a mysq开发者_如何学Gol database.

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No.

Use Javascript to check on client side if every text box is filled, and also sanitize the input on the server.

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you can using Javascript to check if text empty this function will help you just passing in form(onsubmit="return FormValidation();) i hope this code help you

function FormValidation()
    {
        if(orderform.fullname.value == "")
        {
            alert("Please enter your fullname");
            orderform.fullname.focus();
            return false;
        }
        if(orderform.email.value == "")
        {
            alert("Please enter your email");
            orderform.email.focus();
            return false;
        }
        if(orderform.telephone.value == "")
        {
            alert("Please enter your telephone");
            orderform.telephone.focus();
            return false;
        }
        if(forgetform.txtusername.value == "Username")
        {
            alert("Please enter your Username");
            orderform.txtusername.focus();
            return false;
        }
    }

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There is not such input as of i know, you should perform the validation server-side instead to check if the value is null or rather empty. You could also use javascript for that:

if (document.getElementById("input_id").value != "")
{
  // it is not empty, proceed.......
}

Form Validation Using JavaScript.

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No, you can use javascript on client side and/or php on server side to check that the values are filled in correctly

If you use a js framework like mootools you can give a look at this http://mootools.floor.ch/en/demos/formcheck/

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You can do this via JavaScript. Look for JavaScript validation (e.g. JQuery.validation). Oherwise you will have to parse the result and ensure that the value meets your requirements prior to saving it to the db.

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Yes, use a regular text box:

<input type="text" name="Name" />

This will always return a value, there is no way to enter a null value into it.

Of course you need to validate the data on the server side, the form can be spoofed so there is no client side method of ensuring that the data sent to the server is valid.