AJAX To Call and Run PHP Script - php

I have a working PHP script on my server and a HTML page with JavaScript and AJAX which I would like to call and run the PHP script. However, the AJAX responseText is displaying all the PHP code rather than running it. What do I need to do to only get the results of the PHP? Other examples I looked at used the responseText and it seemed to work out well, but not for me :(
Thanks,
elshae
My AJAX code is below...my PHP works fine, it has been tested :)
function ahah(url) {
//document.getElementById(target).innerHTML = ' Fetching data...';
if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
} else if (window.ActiveXObject) {
req = new ActiveXObject("Microsoft.XMLHTTP");
}
if (req != undefined) {
req.onreadystatechange = function() {ahahDone(url);};
req.open("GET", url, true);
req.send("");
}
}
function ahahDone(url) {
if (req.readyState == 4) { // only if req is "loaded"
if (req.status == 200) { // only if "OK"
var div = document.createElement('DIV');
div.innerHTML = req.responseText;
document.getElementById('chicken_contentDiv').appendChild(div);
} else {
" <div> AHAH Error:\n"+ req.status + "\n" +req.statusText + "</div>";
}
}
}
function load(name) {
ahah(name);
return false;
}
<div> + load('./getFiles.php') + </div> //called in a div
Ok here is the new code:
//Some stuff happens here, IMO think it's irrelevant to this issue...
//This is where the AJAX/JQuery calls the php
var info = new OpenLayers.Control.WMSGetFeatureInfo({
url: 'http://localhost:8080/geoserver/wms',
title: 'Identify features by clicking',
queryVisible: true,
eventListeners: {
getfeatureinfo: function(event){
map.addPopup( new OpenLayers.Popup.AnchoredBubble(
"chicken",
map.getLonLatFromPixel(event.xy),
null,
event.text + '<div> Hello Tibet :)</div>' + $('#chicken_contentDiv').load('http://localhost/mapScripts/getFiles.php'), //have also tried localhost:80, no diff
null,
true
));
}
}
});
map.addControl(info);
info.activate();
});

To your apache config or .htaccess file add this line AddType application/x-httpd-php .html so html files will be parsed with php interpreter.

Are you missing the <?php at the beginning of your getFiles.php file?

If the response contains actual PHP code, then it is not being processed by the PHP interpreter. Where are you running this? It is obvious that the web server is not properly configured to process PHP files.
EDIT:
The line you have:
event.text + '<div> Hello Tibet :)</div>' + $('#chicken_contentDiv').load('http://localhost/mapScripts/getFiles.php'),
is incorrect.. you don't want to append the outcome of the jQuery function. The output would always be an object. You just want to run that script, which would populate a DIV with an ID of chicken_contentDiv. (is that really the right DIV to put the details in?)
It should be at the end, after your var info declaration is closed and done.

Related

Script html php

In the script below, I currently have a fixed value in the array of $out variable. Example: $out[1]. What I need is for this fixed value (in this case 1), to be replaced by the str value of the function.
str is javascript
$out[1] is php
Someone can help me?
<script>
function teste2(str) {
var xhttp;
if (str == "") {
document.getElementById("cli").innerHTML = "";
return;
}
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("resimg").innerHTML =
"<img src=" + "<?php echo ("img/base/".$out[1]);?>" + ">"
}
};
xhttp.open("GET", "clique.php?q="+str, true);
xhttp.send();
}
</script>
As mentioned, it doesn't make sense why you are mixing PHP in your JS. If you need data from the server side usable by your client side JS, there are multiple approaches.
The preferred approach is to make an API endpoint you can call and return JSON.
Another approach (not recommended) is to output a JSON object in a script tag on server render and then access it like:
<script>
let data = <?php echo(json_encode($myData)); ?>;
</script>
To answer your question though, you can set the value with JS since the variable you want is client side:
function teste2(str) {
var xhttp;
if (str == "") {
document.getElementById("cli").innerHTML = "";
return;
}
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
let src = 'img/base/' + str;
document.getElementById("resimg").innerHTML = '<img src="' + src + '">';
}
};
xhttp.open("GET", "clique.php?q="+str, true);
xhttp.send();
}
Well, PHP scripts run on the server side, while Javascript ones run on the client's browser.
Therefore, the value of str will only be resolved at runtime, when the function is called on the user's browser. There is no way for your PHP script to know in advance what the value will be, as your PHP script runs before any JS does.
I am sorry, but I believe you should re-imagine your design here.
Edit: I assume your $out is a PHP variable, right?

script within a php page not executed when called using ajax

Please read below my scenario…
I have a PHP file wherein I have javascript within it..
<?php
echo ‘<script>’;
echo ‘window.alert(“hi”)’;
echo ‘</script>’;
?>
On execution of this file directly, the content inside the script is executed as expected. But if this same page is being called via ajax from another page, the script part is NOT executed.
Can you please let me know the possible reasons.
(note: I’m in a compulsion to have script within php page).
When you do an AJAX call you just grab the content from that page. JavaScript treats it as a string (not code). You would have to add the content from the page to your DOM in your AJAX callback.
$.get('/alertscript.php', {}, function(results){
$("html").append(results);
});
Make sure you change the code to fit your needs. I'm supposing you use jQuery...
Edited version
load('/alertscript.php', function(xhr) {
var result = xhr.responseText;
// Execute the code
eval( result );
});
function load(url, callback) {
var xhr;
if(typeof XMLHttpRequest !== 'undefined') xhr = new XMLHttpRequest();
else {
var versions = ["MSXML2.XmlHttp.5.0",
"MSXML2.XmlHttp.4.0",
"MSXML2.XmlHttp.3.0",
"MSXML2.XmlHttp.2.0",
"Microsoft.XmlHttp"]
for(var i = 0, len = versions.length; i < len; i++) {
try {
xhr = new ActiveXObject(versions[i]);
break;
}
catch(e){}
} // end for
}
xhr.onreadystatechange = ensureReadiness;
function ensureReadiness() {
if(xhr.readyState < 4) {
return;
}
if(xhr.status !== 200) {
return;
}
// all is well
if(xhr.readyState === 4) {
callback(xhr);
}
}
xhr.open('GET', url, true);
xhr.send('');
}

Executing javascript script after ajax-loaded a page - doesn't work

I'm trying to get a page with AJAX, but when I get that page and it includes Javascript code - it doesn't execute it.
Why?
Simple code in my ajax page:
<script type="text/javascript">
alert("Hello");
</script>
...and it doesn't execute it. I'm trying to use Google Maps API and add markers with AJAX, so whenever I add one I execute a AJAX page that gets the new marker, stores it in a database and should add the marker "dynamically" to the map.
But since I can't execute a single javascript function this way, what do I do?
Is my functions that I've defined on the page beforehand protected or private?
** UPDATED WITH AJAX FUNCTION **
function ajaxExecute(id, link, query)
{
if (query != null)
{
query = query.replace("amp;", "");
}
if (window.XMLHttpRequest)
{
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{
// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
if (id != null)
{
document.getElementById(id).innerHTML=xmlhttp.responseText;
}
}
}
if (query == null)
{
xmlhttp.open("GET",link,true);
}
else
{
if (query.substr(0, 1) != "?")
{
xmlhttp.open("GET",link+"?"+query,true);
}
else
{
xmlhttp.open("GET",link+query,true);
}
}
xmlhttp.send();
}
** Solution by Deukalion **
var content = xmlhttp.responseText;
if (id != null)
{
document.getElementById(id).innerHTML=content;
var script = content.match("<script[^>]*>[^<]*</script>");
if (script != null)
{
script = script.toString().replace('<script type="text/javascript">', '');
script = script.replace('</script>', '');
eval(script);
}
}
and on certain events, I had to within the script addevent listeners instead of just making a "select onchange='executeFunctionNotIncludedInAjaxFile();'" I had to addEventListener("change", functionName, false) for this. In the script that is being evaluated.
When you update your page by doing something like setting a container's innerHTML to some updated content, the browser simply will not run the scripts in it. You can locate the <script> tags, get their innerHTML (IE may prefer innerTEXT), and then eval() the scripts yourself (which is pretty much what jQuery does, though it finds the scripts with a regex before updating the DOM).
Use this function:
function parseScript(_source) {
var source = _source;
var scripts = new Array();
// Strip out tags
while(source.indexOf("<script") > -1 || source.indexOf("</script") > -1) {
var s = source.indexOf("<script");
var s_e = source.indexOf(">", s);
var e = source.indexOf("</script", s);
var e_e = source.indexOf(">", e);
// Add to scripts array
scripts.push(source.substring(s_e+1, e));
// Strip from source
source = source.substring(0, s) + source.substring(e_e+1);
}
// Loop through every script collected and eval it
for(var i=0; i<scripts.length; i++) {
try {
eval(scripts[i]);
}
catch(ex) {
// do what you want here when a script fails
}
}
// Return the cleaned source
return source;
}
then do parseScript(xmlhttp.responseText); when you're replacing/adding content.
In case some other people stumble upon this old thread, there is one issue with the accepted answer by Deukalion, there is one issue that may have been overlooked: as written, the script only looks for the first script tag. If multiple script tags exist, all others are overlooked.
A few minor tweaks would resolve the issue. Change one line from:
var script = content.match("<script[^>]*>[^<]*</script>");
To:
var script = content.match(/<script[^>]*>[^<]*<\/script>/g);
And another from:
script = script.toString().replace('<script type="text/javascript">', '');
To:
script = script.join("").replace(/<script type="text\/javascript">/g, '');
Now it will gather all the <script> code and execute them in the order found on the page. Otherwise it was an excellent solution.
After the AJAX request, you can make an "on success" function which can take the returned html and do something with it. Then something will be executed.
If there was a code example, then I could provide a code solution to the situation. But using just standard xmlhttprequest, the following could be done:
xhr = new XMLHttpRequest();
xhr.open("GET","ajax_info.txt",true);
xhr.onreadystatechange=function()
{
if (xhr.readyState==4 && xhr.status==200)
{
document.getElementById("myDiv").innerHTML = xhr.responseText;
}
}
xhr.send();
​

Ajax to read PHP

I think I'm getting ahead of myself, but I tried AJAX tutorials to read from a PHP file. The PHP file simply has an echo statement for the time, and I want to pass that to initialize a javascript clock.
But this is my first time trying AJAX and I can't even seem to get it to activate a test alert message.
Here is the code, it's at the bottom of my PHP page after all of the PHP.
<script type='text/javascript'>
function CheckForChange(){
//alert("4 and 4");
//if (4 == 1){
//setInterval("alert('Yup, it is 1')", 5000);
//alert('Now it is changed');
//}
var ajaxReady = new XMLHttpRequest();
ajaxReady.onreadystatechange = function(){
if (ajaxReady.readystate == 4){
//Get the data
//document.getElementById('clocktxt').innerHTML = ajaxReady.responseText;
alert("here");
alert(ajaxReady.responseText);
}
}
ajaxReady.open("GET","ServerTime.php",true);
ajaxReady.send(null);
}
setInterval("CheckForChange()", 7000);
</script>
Can somebody tell me why this isn't working? No idea what I'm doing wrong.
The problem in your code is an uncapitalized letter. (Oops!) You check ajaxReady.readystate; you need to check ajaxReady.readyState.
Because ajaxReady.readystate will always be undefined, your alerts never fire.
Here's your code fixed and working.
As an aside, have you considered using a library to handle the ugliness of cross-browser XHR? jQuery is your friend:
function CheckForChange(){
$.get('ServerTime.php', function(data) {
$('#clocktxt').text(data);
});
}
You should probably have something like:
setInterval(CheckForChange, 7000);
On an unrelated note, it's common naming convension in JavaScript to have function and methods names' first letters not capitalized, and the rest is in camelCase. i.e. checkForChange().
I'm not sure the exact problem with your code; here's what I use -- I'm sure it will work for you. (plus, it works with more browsers)
var xhr = false;
function CheckForChange(){
/* Create xhr, which is the making of the object to request an external file */
if(window.XMLHttpRequest){
xhr = new XMLHttpRequest();
}else{
if(window.ActiveXObject){
try {
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){}
}
}
/* End creating xhr */
/* Retrieve external file, and go to a function once its loading state has changed. */
if(xhr){
xhr.onreadystatechange = showContents;
xhr.open("GET", "ServerTime.php", true);
xhr.send(null);
}else{
//XMLHTTPRequest was never created. Can create an alert box if wanted.
}
/* End retrieve external file. */
}
function showContents(){
if(xhr.readyState==4){
if(xhr.status==200){
alert(xhr.responseText);
}else{
//Error. Can create an alert box if wanted.
}
}
}
setInterval(CheckForChange, 7000);

How to call multiple AJAX functions (to PHP) without repeating code

I have a little script which uses AJAX and PHP to display an image. You can see below that if I call the function mom() it looks in the PHP file index.php?i=mom and displays the image I'm looking for.
But I need the javascript to be lighter as I have 30 images and for each one I have to modify and copy the script below. Is there not a simpler way to have the functions be different and still call a different page?
<script type="text/javascript">
function mom()
{
var xmlHttp = getXMLHttp();
xmlHttp.onreadystatechange = function()
{
if(xmlHttp.readyState == 4)
{
HandleResponse(xmlHttp.responseText);
}
}
xmlHttp.open("GET", "index.php?i=mom", true);
xmlHttp.send(null);
}
function HandleResponse(response)
{
document.getElementById('mom').innerHTML = response;
}
</script>
My Trigger is this
<a href="#" onclick='mom();' />Mom</a>
<div id='mom'></div>
You could modify your function so it takes a parameter :
// The function receives the value it should pass to the server
function my_func(param)
{
var xmlHttp = getXMLHttp();
xmlHttp.onreadystatechange = function()
{
if(xmlHttp.readyState == 4)
{
// Pass the received value to the handler
HandleResponse(param, xmlHttp.responseText);
}
}
// Send to the server the value that was passed as a parameter
xmlHttp.open("GET", "index.php?i=" + param, true);
xmlHttp.send(null);
}
And, of course, use that parameter in the second function :
function HandleResponse(param, response)
{
// The handler gets the param too -- and, so, knows where to inject the response
document.getElementById(param).innerHTML = response;
}
And modify your HTML so the function is called with the right parameter :
<!-- for this first call, you'll want the function to work on 'mom' -->
<a href="#" onclick="my_func('mom');" />Mom</a>
<div id='mom'></div>
<!-- for this secondcall, you'll want the function to work on 'blah' -->
<a href="#" onclick="my_func('blah');" />Blah</a>
<div id='blah'></div>
This should work (if I understand correctly)
<script type="text/javascript">
function func(imgName)
{
var xmlHttp = getXMLHttp();
xmlHttp.onreadystatechange = function()
{
if(xmlHttp.readyState == 4)
{
document.getElementById(imgName).innerHTML =
}
}
xmlHttp.open("GET", "index.php?i=mom", true);
xmlHttp.send(null);
}
</script>
MARTIN's solution will work perfectly.
By the way you should use some javascript framework for Ajax handling like jQuery.
It will make your life easy.
If you are having light weight images you preload the images on your page.
I solved this by making an array of in your case xmlHttp and a global variable, so it increments for each request. Then if you repeatedly make calls to the same thing (eg it returns online users, or, whatever) then you can actually resubmit using the same element of the array too.
Added example code:
To convert it to a reoccuring event, make a copy of these 2, and in the got data call, just resubmit using reget
var req_fifo=Array();
var eleID=Array();
var i=0;
function GetAsyncData(myid,url) {
eleID[i]=myid;
if (window.XMLHttpRequest)
{
req_fifo[i] = new XMLHttpRequest();
}
else if (window.ActiveXObject)
{
req_fifo[i] = new ActiveXObject("Microsoft.XMLHTTP");
}
req_fifo[i].abort();
req_fifo[i].onreadystatechange = function(index){ return function() { GotAsyncData(index); }; }(i);
req_fifo[i].open("GET", url, true);
req_fifo[i].send(null);
i++;
}
function GotAsyncData(id) {
if (req_fifo[id].readyState != 4 || req_fifo[id].status != 200) {
return;
}
document.getElementById(eleID[id]).innerHTML=
req_fifo[id].responseText;
req_fifo[id]=null;
eleID[id]=null;
return;
}
function reget(id) {
myid=eleID[id];
url=urlID[id];
req_fifo[id].abort();
req_fifo[id].onreadystatechange = function(index){ return function() { GotAsyncData(index); }; }(id);
req_fifo[id].open("GET", url, true);
req_fifo[id].send(null);
}
The suggestions to parameterize your function are correct and would allow you to avoid repeating code.
the jQuery library is also worth considering. http://jquery.com
If you use jQuery, each ajax call would literally be this easy.
$('#mom').load('/index.php?i=mom');
And you could wrap it up as follows if you'd like, since you say you'll be using it many times (and that you want it done when a link is clicked)
function doAjax(imgForAjax) { $('#'+imgForAjax).load('/index.php&i='+imgForAjax);}
doAjax('mom');
It makes the oft-repeated ajax patterns much simpler, and handles the issues between different browsers just as I presume your getXMLhttp function does.
At the website I linked above you can download the library's single 29kb file so you can use it on your pages with a simple <script src='jquery.min.js'></script> There is also a lot of great documentaiton. jQuery is pretty popular and you'll see it has a lot of questions and stuff on SO. ajax is just one of many things that jQuery library/framework (idk the preferred term) can help with.

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