call javascription function in php

[nuttynibbles]

hi, i got a javascript function that returns a string. how do i call this js function in php and get the string into php?? this is what i did but it wont work.

javascript function

function getname(){return "john";}

in php:

$str='<SCRIPT LANGUAGE="javascript"> getname()</SCRIPT>';
echo $str;

tks🙂

[NogDog]

In "normal" usage, you can't. PHP runs on the server, then all output (including JavaScript code) is send to the user's browser, at which point any JavaScript would execute. Depending on what you are trying to do, perhaps some sort of AJAX implementation might be order.

[nuttynibbles]

hi, im actually working on a project with Codeigniter and ajax. haha im sorry i posted a thread here. have been using phpbuilder for sometime.
My program allows user to submit description, URL of a picture to mysql database through ajax.
well the problem is, codeigniter allows only defined permitted URI characters to be passed as parameters. currently the characters that are allowed are "a-z 0-9~%.:_-". therefore, if i were to submit string like "hello world??", it will prompt a error message, "the URL submitted is not allow". if I were to allow all characters, there will be security breach. therefore i decided to encrypt the data into alpha numeric before passing into ajax engine. once is passed throught the ajax engine to the php code, i thought i could decrypt it to normal text with the javascript function. but the problem now is i cannot call the javascript decrypt function in php code.

hope you understand my complicated problem. =) below is my ajax and html code. appreciate if you could help me?

ajax engine

var xmlHttp

function ajaxpost(siteurl,param,tag)
{
    xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null){
        alert ("Browser does not support HTTP Request");
        return;
    }
    var strurl=siteurl;
    strurl=strurl+"/"+param;
    xmlHttp.onreadystatechange=function(){
        if(xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
            document.getElementById(tag)[removed]=xmlHttp.responseText;
        }
    }
    xmlHttp.open("GET",strurl,true);
    xmlHttp.send(null);
}

function GetXmlHttpObject()
{
    var xmlHttp=null;
    try{
     // Firefox, Opera 8.0+, Safari
     xmlHttp=new XMLHttpRequest();
     }
    catch (e){
     // Internet Explorer
     try{
         xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
     }
     catch (e){
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
     }
    }
    return xmlHttp;
} 

html:

<div><input type="submit" value="submit" onclick=ajaxpost(’controller/function’,’hello world???://’,’display’)><div>
<div id="display"></div> 

[Roger_Ramjet]

So you'll have to write a php function that does the same thing instead.

Without seeing the js it is pointless for me to speculate on said function, but what you can do in js you can do in php.

[nuttynibbles]

hey i just figured it out. instead of using GET for my ajax, i use POST instead. in this way i'm able to pass my string that are in ^&%(*() characters

Tks for all your effort.