I have the following javascript loop which correctly alerts the value I need to use in a Codeigniter method. Here is the js loop:
function myInsert(){
$('input[name=r_maybe].r_box').each(function(){
if( $(this).prop('checked') ){
// need to replace this alert with codeigniter method below
alert ($(this).prop('value'));
}
});
}
Instead of alerting the required value, I need to somehow execute this Codeigniter method:
//this would never work because it mixes JS with PHP, but I need a workaround
$this->appeal_model->myMethod($(this).prop('value'), 888, 999);
Is there someway that I can run this PHP code inside the javascript loop? I know about PHP being server-side and JS being client-side, but I'm sure there must be a solution to my problem that I'm just not aware of yet. Thanks.
The solution to this is to make an ajax call to the server, you can have a method on your controller which calls your codeigniter method. This divides your php call and your client side call.
If you are inserting something into the database, you should use the ajax post method.
http://api.jquery.com/jQuery.post/
function myInsert() {
$('input[name=r_maybe].r_box').each(function(){
if( $(this).prop('checked') ){
var value = $(this).prop('value');
$.post("controllername/functionname", { value: value }, function(data) {
alert(data); // Returned message from the server
});
}
});
}
Use ajax to store data to the server side:
The code should be something like this:
function myInsert(){
$dataArray=[];
$('input[name=r_maybe].r_box').each(function(){
if( $(this).prop('checked') ){
// need to replace this alert with codeigniter method below
dataArray.push($(this).prop('value'))
}
});
if(dataArray.length>0)
{
$.ajax({
url:"your file name",//this file should contain your server side scripting
type:"POST",
data:{dataName : dataArray}
success:function(){
}
});
}
}
you can use $.post from jquery
function myInsert(){
$('input[name=r_maybe].r_box').each(function(){
if( $(this).prop('checked') ){
$.post('<?php echo site_url("controllerName/functionName")?>',
{"post1": $(this).prop('value'), "post2":888, "post3": 999 },
function(data.res == "something"){
//here you can process your returned data.
}, "json"); //**
}
});
}
In your controller you can have:
function functionName()
{
//getting your posted sec token.
$post1 = $this->input->post('post1');
$post2 = $this->input->post('post2');
$post3 = $this->input->post('post3');
$data['res'] = "something";// return anything you like.
// you should use json_encode here because your post's return specified as json. see **
echo json_encode($data); //$data is checked in the callback function in jquery.
}
Since this will be dumping data directly into your db, make sure this is secured in some manner as well, in terms of who has access to that controller function and the amount of scrubbing/verification done on the data being passed.
Related
I want to know if I can get the return of a JQUERY function, in PHP ?
I have this following jquery function, returning an array and I want to get this array in my PHP, in order to send it to process the data
function getItemMetaList() {
var itemMetaArray = [];
$('.frm_pro_form input, .frm_pro_form select, .frm_pro_form textarea').each(function(cpt){
if($(this).attr('type') != 'hidden' && ($(this).attr("type") != "submit")) {
console.log(cpt);
console.log($(this).attr("name"));
itemMetaArray.push($(this).attr("name"));
}
});
return itemMetaArray;
}
Thanks in advance
function getItemMetaList() {
var itemMetaArray = [];
$('.frm_pro_form input, .frm_pro_form select, .frm_pro_form textarea').each(function(cpt){
if($(this).attr('type') != 'hidden' && ($(this).attr("type") != "submit")) {
itemMetaArray.push($(this).attr("name"));
}
});
$.ajax({
method: "POST",
url: "some.php",
//data: { array: itemMetaArray}
data: JSON.stringify({ array: itemMetaArray})
}).done(function( msg ) {
alert( "Data Saved: " + msg );
});
}
you can send data by this way in a php file like documented here: ajax jquery
The Ajax request returns data for JavaScript in the page loaded in your browser. The browser does not display the data automatically. The answer is captured by .done() in MacBook's example. You can put JavaScript in the done () method to display the data returned. If you wish the page to reload in your browser, Ajax is not the good way. In JavaScript, use form.submit instead. Then you can have your PHP code read the submitted data and generate a new html page and have this displayed by the browser.
I have a function that adds social buttons to my blog posts , but once i load more posts using ajax I cant figure out how can I call add_social_buttons() and pass the data to div.
I'm not really familiar with ajax , i tried this method :
$.ajax({
type:"POST",
url:"functions.php",
data: "social_sharing_buttons()",
success: function(data){
$('.pp').html(data);
}
but it seems that it tries to invoke some totally other function Fatal error: Call to undefined function add_action().
As far as I am aware, you can't. What you can do is have a handler file for your classes, so for example say we have this PHP class,
<?php
class Car {
function getCarType() {
return "Super Car";
}
}
?>
Then in your handler file,
<?php
require_once 'Car.php';
if(isset($_POST['getCarType'])) {
$car = new Car();
$result = $car->getCarType();
echo $result;
}
?>
You'd post your AJAX request to the handler, you could make specific handlers for each request or you could have a generic AJAX handler, however that file could get quite big and hard to maintain.
In your case you'd have in that data,
"getSocialButtons" : true
Then in your AJAX handler file,
if (isset($_POST['getSocialButtons'])) {
// Echo your function here.
}
Then you'd echo out the function within that if statement and using the success callback in your AJAX request do something like this.
document.getElementById("yourDivId").innerHTML = data
That is assuming you're using an ID. Adjust the JS function to suit you.
Try to call that function social_sharing_buttons() like this in function.php:
$.ajax({
type:"POST",
url:"functions.php",
data: {action: 'add'},
success: function(data){
$('.pp').html(data);
}
in functions.php
if(isset($_POST['action']) && !empty($_POST['action'])) {
if($_POST['action'] == 'add') {
echo social_sharing_buttons();
}
}
Im creating a validation form in Ajax and PHP. But i don't have a clue how i should get the value from PHP??
For example:
The validation form is in index.php And the page with the function is checkUser.php.
In checkUser i have a global file included with my classes initialized. The checkUser.php look like this:
<?php
$requser = false;
require "core/rules/glb.php";
$user->checkUser($_GET['username']);
The get function comes from the Ajax call i do in the index file. But how do i know that PHP said that the username already exist så that i can make a if statement and paus the script?
Im a beginner, thanks.
And sorry for my english
$.ajax({
type: "GET",
url: "user_add.php",
data: 'username='+$("#jusername").val()+'&email='+$("#jemail").val()+'&password='+$("#jpassword").val()+'&secureSession=23265s"',
success: function()
{
location.href='register.php';
}
});
Jus print out the data, for better help also post the ajax script
<?php
$requser = false;
require "core/rules/glb.php";
print $user->checkUser($_GET['username']);
If you are trying to give a response to the ajax call from php, then you can do it via normal output. Just like
echo json_encode(array("status"=>"FAIL"));
exit();
will send a json response to the ajax call from the php script. like
{"status":"FAIL"}
which you can parse it at the ajax callback and check the status. like
var data = JSON.parse(response);
if(data.status == "FAIL") {
alert("Ajax call returned failed");
}
Im currently new to PHP and JQuery after having using ASP.Net and C Sharp for the 2 years. I have this major problem in which i require some assistance in.
I have a HTML <input type="submit" id="btnWL" value="Add to Wishlist"> button. Basically when this button is pressed a table called 'wishlist' in the database is checked to see if the current product is already in a wishlist. If no the button will trigger a database save else it will return a JQuery alert pop up error message.
I having difficulty in passing 2 PHP variables: $_SESSION["username"] and $_GET["ProductId"] into this JQuery method:
<script type="text/javascript">
$(document).ready(function() {
$('#btnWL').live('click', function() {
$.post("addToWishlist.php");
});
});
</script>
As you can see this JQuery method must pass those values to an external PHP File which checks for an already exsisting record in the 'wishist' table with those details.
<?php
$WishlistDAL = new WishlistDAL();
$result = $WishlistDAL->get_ProductInWishlistById($_GET["ProductId"]);
if (isset($_POST["isPostBack"])) {
if (isset($_SESSION["username"])) {
if (isset($_GET["btnWL"])) {
//Check if ProductId is in Cart
if (mssql_num_rows($result)>0)
{
//Return an error
//Sumhow this has to trigger an alert box in the above JQuery method
}
else
{
//Write in Wishlist Table
$WishlistDAL->insert_ProductInWishlist($_GET["ProductId"], $_SESSION["username"]);
}
}
}
else
{
//Return Error
}
}
?>
Another problem I have is then displaying an alert box using the same JQuery method for any errors that where generated in the php file.
Any Ideas how I can implement this logic? Thanks in advance.
Your "$.post()" call isn't passing any parameters, and has no callback for interpreting the results:
$.post('addToWishlist.php', { username: something, password: something }, function (response) {
});
The "something" and "something" would probably come from your input fields, so:
$.post('addToWishlist.php', { username: $('#username').val(), password: $('#password').val() }, function (response) {
});
Now the callback function would interpret the response from the server:
$.post('addToWishlist.php', { username: $('#username').val(), password: $('#password').val() }, function (response) {
if (response === "FAIL") {
alert("fail");
}
else {
// ... whatever ...
}
});
Exactly what that does depends on your server code; that "FAIL" response is something I just made up as an example of course.
jQuery accepts an callback:
$(document).ready(function() {
$('#btnWL').live('click', function() {
$.post("addToWishlist.php", {'isPostBack':1}, function(res){
if (res.match(/err/i)){
alert(res);
}
});
});
});
Then, in the php, just (echo('Error adding record')) for this jquery to see there's an error string in the response and pop up the error message.
Other methods would be to use json, or http status codes and $.ajaxError(function(){ alert('error adding'); });.
from what i can tell so far is you'll only need to pass in the product id in and you can do this by appending your $.post call with the value; this will pass to your php script as a query string variable. i'm not sure which php script you posted, but if you're sending your data with jquery, it's using post and not get, so you may need to make an adjustment there and the session data should be available regardless, since it's the same session.
again this is without seeing all the code and since some of it isn't labeled, it's hard to determine. another thing, i like to use $.ajax for most actions like this, you have a lot more room to define and structure, as well as create one generic ajax function to call the methods and post data, as well as make a response callback. here's the documentation for you to look into $.ajax
i hope this helps.
I have a file which is loaded at the top of my document, which is called Videos.php. Inside that file are several functions, such as getYoutubeVideos. On some pages, I need to call upon that function several times (up to 50), and it of course creates major lag on load times. So I have been trying to figure out how to call that function in, only when it is need (when someone clicks the show videos button). I have very little experience with jQuery's ajax abilities. I would like the ajax call to be made inside of something like this:
jQuery('a[rel=VideoPreview1).click(function(){
jQuery ("a[rel=VideoPreview1]").hide();
jQuery ("a[rel=HideVideoPreview1]").show();
jQuery ("#VideoPreview1").show();
//AJAX STUFF HERE
preventDefault();
});
Ok I have created this based on the responses, but it is still not working:
jQuery Code:
jQuery(document).ready(function(){
jQuery("a[rel=VideoPreview5]").click(function(){
jQuery("a[rel=VideoPreview5]").hide();
jQuery("a[rel=HideVideoPreview5]").show();
jQuery.post("/Classes/Video.php", {action: "getYoutubeVideos",
artist: "Train", track: "Hey, Soul Sister"},
function(data){
jQuery("#VideoPreview5").html(data);
}, 'json');
jQuery("#VideoPreview5").show();
preventDefault();
});
jQuery("a[rel=HideVideoPreview5]").click(function(){
jQuery("a[rel=VideoPreview5]").show();
jQuery("a[rel=HideVideoPreview5]").hide();
jQuery("#VideoPreview5").hide();
preventDefault();
});
});
And the PHP code:
$Action = isset($_POST['action']);
$Artist = isset($_POST['artist']);
$Track = isset($_POST['track']);
if($Action == 'getYoutubeVideos')
{
echo 'where are the videos';
echo json_encode(getYoutubeVideos($Artist.' '.$Track, 1, 5, 'relevance'));
}
$.post('Videos.php', {
'action': 'getYoutubeVideos'
}, function(data) {
// do your stuff
}, 'json');
In your php code, do something like this:
$action = isset($_POST['action'])? $_POST['action'] : '';
if($action == 'getYoutubeVideos')
{
echo json_encode(getYoutubeVideos());
}
Then data in your JavaScript function will be the array/object/value returned by getYoutubeVideos().
I would do the JS part like ThiefMaster describes, but the php part would i handle a little bit different.
I would do something like this:
if(isset($_POST['action'], $_POST['par1'], $_POST['par2'])
{
$action = $_POST['action'];
$result = $this->$action($_POST['par1'], $_POST['par2]);
echo json_encode(result);
}
But be careful, if you have some methods in the class which shouldn't be called by the user, trough manipulating POST data, then you need some way to whitelist the methods the JavaScript may call. You can do it by prefixing the methods i.e:
$this->jsMethod.$action(....);
or by simple if/switch condition.
Ok here is what ended up working:
PHP CODE
$Action = isset($_POST['action']);
if($Action == 'getYoutubeVideos')
{
getYoutubeVideos($_POST['artist'].' '.$_POST['track'], 1, 5, 'relevance');
}
JQUERY
jQuery.ajax({
type: "POST",
url: "/Classes/Video.php",
data: "action=getYoutubeVideos&artist=artist&track=track",
success: function(data){
jQuery("#VideoPreview1").html(data);
}
});
json encoding was annoying, not sure if json is hte better way of doing it, I could actually use the jQuery.post function as well, because the real problem was with the PHP. If anyone knows about any security problems with the method I am doing, please let me know. Seems fine though.