ajax

[cabbie]

I am trying to check data base to see if the username is availible..

Partial code of js and php The echo $username works I do not get a row count or username database result. The database works with other queries..What do I have wrong?

 form line->       <div>Username: </div>
    <input id="username" type="text" onblur="checkusername()" onkeyup="restrict('username')" maxlength="16">

 

 

function checkusername(){
var u = _("username").value;
if(u != ""){
_("unamestatus").innerHTML = 'checking ...';
var ajax = ajaxObj("POST", "php_includes/nameCheck.php");
 

        ajax.onreadystatechange = function() {
       if(ajaxReturn(ajax) == true) {
           _("unamestatus").innerHTML = ajax.responseText;
       }
        }
        ajax.send("usernamecheck="+u);
}
}
 

 

nameCheck.php

 

<?php
//include_once("classes/connect.php");

if(isset($_POST["usernamecheck"])){

  $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);   
    echo $username;
    //// query to check if the username is in the db already ////
    $unameSQL = $db->prepare("SELECT username FROM members WHERE username=:usernamecheck LIMIT 1");
    $unameSQL->bindValue(':usernamecheck',$username,PDO::PARAM_STR);
    try{
        $unameSQL->execute();
        echo $unameSQL;       //NOTHING//
        $unCount = $unameSQL->rowCount();
        echo $uncount;   //NOTHING//
    }
    catch(PDOException $e){
        echo $e->getMessage();
        $db = null;
        exit();
    }
    if($unCount == 0){
        echo $username, "is OK";
        $db = null;
        exit();
    } else {
    echo  "Sorry, that username is already in use in the system";
    exit();
    }
    }
?>   
<?php
include_once("classes/connect.php");

if(isset($_POST["usernamecheck"])){

  $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);   
    echo $username;
    //// query to check if the username is in the db already ////
    $unameSQL = $db->prepare("SELECT username FROM members WHERE username=:usernamecheck LIMIT 1");
    $unameSQL->bindValue(':usernamecheck',$username,PDO::PARAM_STR);
    try{
        $unameSQL->execute();
        echo $unameSQL;
        $unCount = $unameSQL->rowCount();
        echo $uncount;
    }
    catch(PDOException $e){
        echo $e->getMessage();
        $db = null;
        exit();
    }
    if($unCount == 0){
        echo $username, "is OK";
        $db = null;
        exit();
    } else {
    echo  "Sorry, that username is already in use in the system";
    exit();
    }
    }
?>  

[DaveyK]

Can you verify that the ajax is actually sending to the correct file? Any errors in the console?

[cabbie]

  $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);   
    echo $username;

 This echo verifies the entered username. The echos below contain no data The error is in the query or binding..

[jazzman1]

Do you get the value of:

function checkusername(){
var u = _("username").value;
alert(u); 

If your answer is - no, you need to show us the restrict() function also.

[cabbie]

Result was no.... The restrict() function works I'll provide it and url I think you can see the page source..

 

 

function restrict(elem){
var tf = _(elem);
var rx = new RegExp;
if(elem == "email"){
rx = /[' "]/gi;
} else if(elem == "username"){
rx = /[^a-z0-9]/gi;
}
tf.value = tf.value.replace(rx, "");
}
function emptyElement(x){
_(x).innerHTML = "";
}
function checkusername(){
var u = _("username").value;
alert(u);
if(u != ""){
_("unamestatus").innerHTML = 'Checking to see if name is available ...';
var ajax = ajaxObj("POST", "includes/nameCheck.php");
        ajax.onreadystatechange = function() {
       if(ajaxReturn(ajax) == true) {
           _("unamestatus").innerHTML = ajax.responseText;
       }
        }
        ajax.send("usernamecheck="+u);
}
}

 

https://libertarian-forum.com/!!AA/register.php

[cabbie]

I did get the alert to work....

[jazzman1]

Good for you, next step is to change the html form method from GET to POST.

[cabbie]

 Let me reask the question . The php code is the original code that works. Then  the connect.php Help me convert the query to pdo..

 

 

<?php
// Ajax calls this NAME CHECK code to execute
if(isset($_POST["usernamecheck"])){
include_once("includes/db_conx.php");
$username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);
$sql = "SELECT id FROM users WHERE username='$username' LIMIT 1";
    $query = mysqli_query($db_conx, $sql);
    $uname_check = mysqli_num_rows($query);
    if (strlen($username) < 3 || strlen($username) > 16) {
   echo '<strong style="color:#F00;">3 - 16 characters please</strong>';
   exit();
    }
if (is_numeric($username[0])) {
   echo '<strong style="color:#F00;">Usernames must begin with a letter</strong>';
   exit();
    }
    if ($uname_check < 1) {
   echo '<strong style="color:#009900;">' . $username . ' is OK</strong>';
   exit();
    } else {
   echo '<strong style="color:#F00;">' . $username . ' is taken</strong>';
   exit();
    }
}
?>

 

connect.php

 

<?php
$db_host = "localhost";
$db_username = "libertc0_dobbin";
$db_pass = "*****";
$db_name = "libertc0_vfl";
try{
$db = new PDO('mysql:host='.$db_host.';dbname='.$db_name,$db_username,$db_pass);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e){
echo $e->getMessage();
exit();
}
?>

[jazzman1]

I only want to know whether js sends a proper value to the server. 

 

So, on the top of the nameCheck.php put down next:

echo '<pre>'.print_r($_POST, true).'</pre>';

Don't forget to change the html method attribute:

 <form name="signupform" id="signupform" onsubmit="return false;" class="form" method="post">

[cabbie]

Print out =

Array
(
    [usernamecheck] => jim
)

[jazzman1]

You have to fetch the resut.

 

Try,

if(isset($_POST["usernamecheck"])){

    $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);   
    //// query to check if the username is in the db already ////
    $unameSQL = $db->prepare("SELECT username FROM members WHERE username=:usernamecheck LIMIT 1");
    $unameSQL->bindValue('usernamecheck',$username,PDO::PARAM_STR);
    $unameSQL->execute(); // execute the sql
    $row = $unameSQL->fetch(PDO::FETCH_ASSOC); // fetch the result
    $count = $unameSQL->rowCount(); // count rows

    try{
        
        echo $row['usernamecheck'];
    }
    catch(PDOException $e){
        echo $e->getMessage();
        $db = null;
        exit();
    }
   
  echo $count;

  // free pdo connection  
  $unameSQL = null;

[cabbie]

Same thing ..I had to add a closing curly brace. Also added echo $username That is the only thing that echos...

https://libertarian-forum.com/!!AA/register.php

 

Revised code

<?php
if(isset($_POST["usernamecheck"])){
     
    $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);
    echo $username;
    //// query to check if the username is in the db already ////
    $unameSQL = $db->prepare("SELECT username FROM members WHERE username=:usernamecheck LIMIT 1");
    $unameSQL->bindValue('usernamecheck',$username,PDO::PARAM_STR);
    $unameSQL->execute(); // execute the sql
    $row = $unameSQL->fetch(PDO::FETCH_ASSOC); // fetch the result
    $count = $unameSQL->rowCount(); // count rows
     
    try{
    echo $row['usernamecheck'];
    }
    catch(PDOException $e){
    echo $e->getMessage();
    $db = null;
    exit();
    }
    }
       
      echo $count;
     
      // free pdo connection  
      $unameSQL = null;
      ?>

[jazzman1]

Ok, don't focus to count and try{}catch{} for now.

<?php
if(isset($_POST["usernamecheck"])){
     
    $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);
    //// query to check if the username is in the db already ////
    $unameSQL = $db->prepare("SELECT username FROM members WHERE username=:usernamecheck LIMIT 1");
    $unameSQL->bindValue('usernamecheck',$username,PDO::PARAM_STR);
    $unameSQL->execute(); // execute the sql
    $row = $unameSQL->fetch(PDO::FETCH_ASSOC); // fetch the result

    echo $row['usernamecheck'];

Enter the proper name to the html form, which you're 100%  sure exist in the database and see if the result comes back.

 

You can put down alert in this part of script:

if(ajaxReturn(ajax) == true) {
            alert(ajax);
           _("unamestatus").innerHTML = ajax.responseText;
       }

EDIT: I modified the php script above!

[cabbie]

yes that works Using link above enter karyoker.. That is in the data base I am not sure what you meant Dont use focus to count..

[cabbie]

Im using onblur so that when you click in the email you get a response..

[cabbie]

No it doesnt either work I didnt have both files uploaded.

[jazzman1]

When I said - don't focus for now about something , I wanted to say just ignore for a moment the pdo count function and the try{}catch{} block because it is easy for debugging to get the result back.

 

I don't have any idea what are you talking about by saying - the files' upload failed.

[cabbie]

Ok I found out I didnt even have the right dir path to connect.php   I have this code working..Last half is commented out ..

   echo 'fired', $row['username']; is printing username..

 

 

  <?php
include_once('connect.php');
echo '<pre>'.print_r($_POST, true).'</pre>';
if(isset($_POST["usernamecheck"])){
        $username = preg_replace('#[^a-z0-9]#i', '', $_POST['usernamecheck']);
        echo $username;
        //// query to check if the username is in the db already ////
             $unameSQL = $db->prepare("SELECT username FROM members WHERE username=:usernamecheck LIMIT 1");
             $unameSQL->bindValue(':usernamecheck',$username,PDO::PARAM_STR);
              $unameSQL->execute(); // execute the sql
               $row = $unameSQL->fetch(PDO::FETCH_ASSOC); // fetch the result
              
               $count = $unameSQL->rowCount(); // count rows
            try{
            echo 'fired', $row['username'];
            }
            catch(PDOException $e){
                echo $e->getMessage();
                $db = null;
                exit();
            }
            }
            
            //// Check if username is in the db already ////
            /*if($unCount > 0){
                echo "Sorry, that username is already in use in the system";
                $db = null;
                exit();
                    }
                        else{
                        echo $uncount;
                            if (strlen($username) < 3 || strlen($username) > 16) {
                               echo '<strong style="color:#F00;">3 - 16 characters please</strong>';
                               exit();
                               }                                
                            if (is_numeric($username[0])) {
                               echo '<strong style="color:#F00;">Usernames must begin with a letter</strong>';
                               exit();
                                }
                            if ($unCount < 1) {
                           echo '<strong style="color:#009900;">' . $username . ' is OK</strong>';
                           exit();
                            }
                        }
                    
    }*/
    ?>

[jazzman1]

You need to check if that username does not exist in the db before to call try{}catch{} blocks not after.

 

Or more professional, create a custom function, put your logic in that function and call it inside try{} block.