Insert form into database [closed] - php

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I'm trying to insert my form information into a database that is already created. So far I have:
<form action="insert.php" method="post">
Username:
Password:
Confirm Password:
<input type="submit">
if loops {
send alert and return back to form page; }
</form>
My question is: using this code, will the user information still be sent to the database file if the if loops are activated or will I need an exit statement after every if loop? (I do not want any information sent if the if loops are activated).
Thanks

Answer 1

You need inputs on your form:
<form action="insert.php" method="post">
Username: <input type="text" name="username">
Password: <input type="password" name="password">
Confirm Password: <input type="password" name="confirm">
<input type="submit" name="submit">
</form>
Then on insert.php
if (isset($_POST['submit'])){
$Error = 0;
if (!isset($_POST['username'])){
$Error++;
}
if (!isset($_POST['password'])){
$Error++;
}
if (!isset($_POST['confirm'])){
$Error++;
}
if ($Error > 0){
echo "Error in HTML Validation";
exit;
}
// continue post verification here.
}

Answer 2

You can also validate your form in client-side and it is faster and reduces server load:
<form name="myForm" action="insert.php" method="post" onsubmit="return validateForm()>
Username:
Password:
Confirm Password:
<input type="submit">
</form>
And write a javascript for validating your form:
<script type="text/javaScript">
function validateForm()
{
//Here will be your validation logic
//if input doesn't meet your requirement then return false
var x=document.forms["myForm"]["email"].value;
if(x is not an email address)
return false;
}
}
</script>