Passing jquery values to php

[capypara]

Hi, i have a question regarding passing jquery values to php. I tried using Firebug, and my values got displayed in Firebug's post parameter/source sections, but the value was not even in my post array when i var_dump the array. Is there something wrong with my code?

//JS code
function check_pwd()
{
	pwd = prompt("please input your password","");
	$.post("/someurl", { jspwd: pwd } );
	return true;
}

PHP Code:

//PHP code, using CodeIgniter syntax. jspwd was not included in the post values array
var_dump($this->input->post()); 


I tried to set a hidden value in my html using

pwd = prompt("please input your password","");
$("#pwd").attr('value', pwd);

as well but it did not work too. If anyone has other suggestions on how to pass values from a Javascript popupbox to a php page I am willing to try it too.

[Kor]

Originally Posted by capypara

function check_pwd()
{
pwd = prompt("please input your password","");
$.post("/someurl", { jspwd: pwd } );
return true;
}

That is not a native JavaScript code. Do you use a JavaScript framework/library? Which one? JQuery? Prototype? MooTools? Google API? Yahoo API? Other?

Don't make us guess, please.

[devnull69]

If (by any chance) you are using jQuery ... did you try to access the parameter using the PHP standard $_POST["jspwd"]?

[VIPStephan]

You guys should read the thread title or the first sentence in the OP’s post where it says which framework this is. It was just posted in the wrong forum.

[Kor]

Originally Posted by VIPStephan

You guys should read the thread title or the first sentence in the OP’s post where it says which framework this is. It was just posted in the wrong forum.

Well yes... Could be... except that I have never heard about "jquery values"

[capypara]

Originally Posted by devnull69

If (by any chance) you are using jQuery ... did you try to access the parameter using the PHP standard $_POST["jspwd"]?

Hi there, yes i have tried it and i get the same error.

A PHP Error was encountered
Severity: Notice
Message: Undefined index: jspwd

And sorry if i did not describe the problem well enough. I am using PHP for server side and JQuery and Javascript for client side, and using the Codeigniter framework for this project.

The main thing that i want is to pass values from a popup input box from client side to my PHP side, but both $.post and setting a value by using $("#pwd").attr('value', pwd); does not seem to be working.
Am i using this function $.post correctly?

[capypara]

Regarding the main problem where i need to pass a value from a popup input box from client side to my PHP side,

$("#pwd").attr('value', pwd);

This method works now after some problem solving. However I still cant get $.post to work =/ Maybe i still dont understand how $.post functions...............

[devnull69]

One way of working with $.post is like this

$.post(url, {parameters}, callback);

url is a string containing the (relative or absolute) URL to the server side script (PHP in your case)

parameters is a list of parameters. Example for you jspwd parameter

{'jspwd' : $('#pwd').val()}

The PHP script will then receive the parameter as $_POST["jspwd"]

callback is a function that will be executed after the request has successfully finished.

$.post('path/to/your.php', {'jspwd': $('#pwd').val()}, function(data) {
   alert(data);  // this will alert the output of the PHP script
});

Most importantly: $.post() starts an asynchronous request which means that the "Javascript program flow" will continue to execute even if the request is not yet finished. So if you have a construct like this

function whatever() {
   $.post(...);
   return true;
}

then the "return true" will be executed before(!) the request finishes.

[capypara]

Thanks for the explanation devnull69 =) I have seen several sites that include the third parameter but i had no idea what that was used for. Will take a good look at $.post again later on.