novice, I am writing a registration function.
realize the registration function through ajax, php and mysql.
I checked it with chrome"s debugging tool. When I entered an existing user name, I successfully returned "registered successfully!" , when I enter the new username and password, the value of echo $res_insert is 0. Return "the system is busy, please wait a moment" ,
ask God for help, thank you!
js section:
$(function(){
$("-sharpregbutton").click(function(){
$.ajax({
type:"post",
url:"register.php",
dataType:"json",
data:{username:$("-sharpusernamereg").val(),password:$("-sharppasswordreg").val()},
success:function(feedbackdata){
$("-sharpregisterstatus").html(feedbackdata);
}
})
})
});php section:
<?php
$username = $_POST["username"];
$password = $_POST["password"];
$servername = "localhost";
$sqlusername = "root";
$sqlpassword = "root";
$dbname = "guitartabs";
//
$conn = new mysqli($servername, $sqlusername, $sqlpassword, $dbname);
if ($conn->connect_error) {
die(": " . $conn->connect_error);
}
$sql = "SELECT username FROM users where username = "$username"";
$result = $conn->query($sql);
$num = mysqli_num_rows($result);
if($num){
echo "";
}
else //
{
$sql_insert = "insert into users (`username`,`password`) values ("".$username."","".$password."")";
$res_insert = $conn->query($sql_insert);
if($res_insert)
{
echo "";
}
else
{
echo "";
}
}
?>