PHP-MYSQL不能插入多行

Question

I have my sign up forms in html all setup and working, it runs and inserts a row into mysql table the first time, but I can't insert any more rows.

My php is:-

include "config.php";

$gamerid = $_POST['gamerid_create'];
$email = $_POST['email_create'];
$password = md5($_POST['password_create']);
$country = $_POST ['country_create'];

echo "<pre>";
print_r($_POST);
echo "</pre>";

$insert = "insert into users (gamerid,email,password,country) values('$gamerid','$email','$password','$country')";
mysql_query($insert);

Now when I created my table in mysql I used the following code:-

CREATE TABLE users
(
id INT primary key NOT NULL AUTO_INCREMENT,
gamerid varchar (255) NOT NULL,
email varchar (255) NOT NULL,
password varchar (255) NOT NULL,
country varchar (255) NOT NULL
)

Why aren't more rows inserted?

My html is as follows:

<form id = "signup_form" method = "POST" action = "http://localhost:8080/quizicle/pages/register.php">
<table id = "signup_form_table" border = "0" class = "signup_table_body">
<tr class = "signup_form_tr_label">
<td class = "signup_form_td"><label for "gamerid" class = "signup_form_label">Create a Gamer ID:</label></td>
<td class = "signup_form_td"><label for "email" class = "signup_form_label">Your Email:</label></td>
<td class = "signup_form_td"><label for "password" class = "signup_form_label">Password:</label></td>
<td class = "signup_form_td"><label for "country" class = "signup_form_label">Country:</label></td>
<td class = "signup_form_td"></td>
</tr>

<tr class = "signup_form_tr">
<td class = "signup_form_td"><input type = "text" name = "gamerid_create" id = "gamerid_create" maxlength="50" class = "signup_form_input"/></td>
<td class = "signup_form_td"><input type = "text" name = "email_create" id = "email_create" maxlength="50" class = "signup_form_input"/></td>
<td class = "signup_form_td"><input type = "password" name = "password_create" id = "password_create" maxlength="50" class = "signup_form_input"/></td>
<td class = "signup_form_td">
<select name = "country_create">                                    <option>Please select a country</option> 
<option>United Kingdom</option> 
</select>
</td>
<td class = "signup_form_td"><input type = "submit" value = "Sign me up!" id = "btn_register" value = "register" class = "signup_form_submit_btn"/></td>
</tr>   
</table>
</form>

Answer 1

    <?php

include "config.php";

// INPUT CLEANING FUNCTION
function clean($str)
{
    $cleaned = mysql_real_escape_string(strip_tags($str));
    return $cleaned;
}

$gamerid = clean($_POST['gamerid_create']);
$email = clean($_POST['email_create']);
$password = clean(md5($_POST['password_create']));
$country = clean($_POST ['country_create']);


$insert = "insert into users(gamerid,email,password,country) values('$gamerid' ,'$email',' $password', '$country')";                        
mysql_query($insert);
?>

1. Check your id field if its autoincrement
2. Check name of attributes of you input tags or textarea tags // Optional Suggestions
3. Valid the email using filter_var function which is built in with php
4. Validate password length and strength
5. Also consider some naming conventions
6. Use a framework CODEIGNITER or LARAVEL

Answer 2

It's probably in regards to your primary key id

Let's change up the sql and see if it works.

$insert = "INSERT INTO users (id, gamerid, email, password, country) 
  VALUES (NULL, '{$_POST['gamerid_create']}', '{$_POST['email_create']}', 
  '{$_POST['password_create']}', '{$_POST['country_create']}');";

Some things you should consider as you develop your skills with PHP / MySQL:

• Validate and scrub your user input. Sql injection risks. See: mysql_real_escape_string(), for basic help here.

• You should configure your tables make sure you set the field type and size to the minimum that you need, VARCHAR(255) will waste alot of space if you dont fill it all.

• Always hash passwords with at least the md5 algorithm.