接收POST的失败导致PHP / HTML

Question

I've done tests and it's definitely not a problem with the database, it connects fine and variables input if specified, (the integers work). Note that the {} brackets around the variables in the sql statement, for some reason need to be there for it to work, if someone could tell me why that'd be great.

The main problem is the POST for receiving from the form, nothing echoes, nor inputs to the database. Can anyone help? Thanks in advance.

PHP:

$firstName = $_POST['firstName'];
$lastName = $_POST['lastName'];
$username = $_POST['username'];
$pw = $_POST['pw'];
$email = $_POST['email'];
$wins = 0;
$losses = 0;
$played = 0;
$earnings = 0;

$sql = "
INSERT INTO users (first_name, last_name, username, password, email, last_login, date_joined, wins, losses, played, earnings) VALUES
('{$firstName}','{$lastName}','{$username}','{$pw}','{$email}','1111','2222','{$wins}','{$losses}','{$played}','{$earnings}')
";

if(!mysql_query($sql, $con)){
echo 'Worked';
} else {echo 'Failed';}

HTML:

<form id="registration_form" action="http://valhq.com/register/" method="POST"> 
<div class="signup_form_content_names">
    <div class="signup_form_input_fn">
        <input type="text" class="signup_input_style_fn" id="firstName" placeholder="First Name" maxlength="20">
    </div>
    <div class="signup_form_input_ln">
        <input type="text" class="signup_input_style_ln" id="lastName" placeholder="Last Name" maxlength="20">
    </div>
</div>
<div class="signup_form_content">
    <div class="signup_form_input">
        <input type="text" class="signup_input_style" placeholder="E-Mail" id="email" maxlength="40">
    </div>
    <div class="signup_form_input">
        <input type="text" class="signup_input_style" placeholder="Confirm E-Mail" id="emailconf" maxlength="40">
    </div>
    <div class="signup_form_input">
        <input type="text" class="signup_input_style" placeholder="Desired Username" id="username" maxlength="20">
    </div>
    <div class="signup_form_input">
        <input type="password" class="signup_input_style" placeholder="Password" id="pw" maxlength="64">
    </div>
    <div class="signup_form_input">
        <input type="password" class="signup_input_style" placeholder="Confirm Password" id="pwconf" maxlength="64">
    </div>
    <div class="signup_tc">
        <p>
            <input type="checkbox" id="terms" value="terms_true" style="vertical-align:middle;">
            I agree to the <a href="http://valhq.com/terms">Terms and Conditions</a>
            <span class="signup_tc_required">*</span>
        </p>
    </div>
    <input type="submit" id="submit" class="signup_submit" value="Create Account">
    <div class="signup_alreadyMember">
        <a href="http://valhq.com/login">Already a member? Login.</a>
    </div>
    <div class="signup_error">
        <span class="signup_error" id="fn_error_message"></span>
        <span class="signup_error" id="ln_error_message"></span>
        <span class="signup_error" id="email_error_message"></span>
        <span class="signup_error" id="emailconf_error_message"></span>
        <span class="signup_error" id="username_error_message"></span>
        <span class="signup_error" id="pw_error_message"></span>
        <span class="signup_error" id="pwconf_error_message"></span>
        <span class="signup_error" id="tos_error_message"></span>
    </div>
</div>
</form>

Answer 1

if you want to get your values using $_POST your inputs name attributes must be set

example add name="firstName"

<input type="text" class="signup_input_style_fn" name="firstName"  id="firstName" placeholder="First Name" maxlength="20">

So now you can access it using

$firstName = $_POST['firstName'];