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?
I have seen lots of jQuery examples where parameter size and name are unknown.
My URL is only going to ever have 1 string:
http://example.com?sent=yes
I just want to detect:
Does sent exist?
Is it equal to "yes"?
Best solution here.
var getUrlParameter = function getUrlParameter(sParam) {
var sPageURL = window.location.search.substring(1),
sURLVariables = sPageURL.split('&'),
sParameterName,
i;
for (i = 0; i < sURLVariables.length; i++) {
sParameterName = sURLVariables[i].split('=');
if (sParameterName[0] === sParam) {
return sParameterName[1] === undefined ? true : decodeURIComponent(sParameterName[1]);
}
}
return false;
};
And this is how you can use this function assuming the URL is,
http://dummy.com/?technology=jquery&blog=jquerybyexample.
var tech = getUrlParameter('technology');
var blog = getUrlParameter('blog');
Solution from 2023
We have: http://example.com?sent=yes
let searchParams = new URLSearchParams(window.location.search)
Does sent exist?
searchParams.has('sent') // true
Is it equal to "yes"?
let param = searchParams.get('sent')
and then just compare it.
jQuery code snippet to get the dynamic variables stored in the url as parameters and store them as JavaScript variables ready for use with your scripts:
$.urlParam = function(name){
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
if (results==null) {
return null;
}
return decodeURI(results[1]) || 0;
}
example.com?param1=name¶m2=&id=6
$.urlParam('param1'); // name
$.urlParam('id'); // 6
$.urlParam('param2'); // null
example params with spaces
http://www.jquery4u.com?city=Gold Coast
console.log($.urlParam('city'));
//output: Gold%20Coast
console.log(decodeURIComponent($.urlParam('city')));
//output: Gold Coast
I always stick this as one line. Now params has the vars:
params={};location.search.replace(/[?&]+([^=&]+)=([^&]*)/gi,function(s,k,v){params[k]=v})
multi-lined:
var params={};
window.location.search
.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(str,key,value) {
params[key] = value;
}
);
as a function
function getSearchParams(k){
var p={};
location.search.replace(/[?&]+([^=&]+)=([^&]*)/gi,function(s,k,v){p[k]=v})
return k?p[k]:p;
}
which you could use as:
getSearchParams() //returns {key1:val1, key2:val2}
or
getSearchParams("key1") //returns val1
Yet another alternative function...
function param(name) {
return (location.search.split(name + '=')[1] || '').split('&')[0];
}
Using URLSearchParams:
var params = new window.URLSearchParams(window.location.search);
console.log(params.get('name'));
Be careful about the compatibility (Mostly it's fine, but IE and Edge, may be different story, check this for compatible reference: https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)
May be its too late. But this method is very easy and simple
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery.url.js"></script>
<!-- URL: www.example.com/correct/?message=done&year=1990 -->
<script type="text/javascript">
$(function(){
$.url.attr('protocol') // --> Protocol: "http"
$.url.attr('path') // --> host: "www.example.com"
$.url.attr('query') // --> path: "/correct/"
$.url.attr('message') // --> query: "done"
$.url.attr('year') // --> query: "1990"
});
UPDATE
Requires the url plugin : plugins.jquery.com/url
Thanks -Ripounet
Or you can use this neat little function, because why overcomplicated solutions?
function getQueryParam(param, defaultValue = undefined) {
location.search.substr(1)
.split("&")
.some(function(item) { // returns first occurence and stops
return item.split("=")[0] == param && (defaultValue = item.split("=")[1], true)
})
return defaultValue
}
which looks even better when simplified and onelined:
tl;dr one-line solution
var queryDict = {};
location.search.substr(1).split("&").forEach(function(item) {queryDict[item.split("=")[0]] = item.split("=")[1]})
result:
queryDict['sent'] // undefined or 'value'
But what if you have got encoded characters or multivalued keys?
You better see this answer: How can I get query string values in JavaScript?
Sneak peak
"?a=1&b=2&c=3&d&e&a=5&a=t%20e%20x%20t&e=http%3A%2F%2Fw3schools.com%2Fmy%20test.asp%3Fname%3Dståle%26car%3Dsaab"
> queryDict
a: ["1", "5", "t e x t"]
b: ["2"]
c: ["3"]
d: [undefined]
e: [undefined, "http://w3schools.com/my test.asp?name=ståle&car=saab"]
> queryDict["a"][1] // "5"
> queryDict.a[1] // "5"
This one is simple and worked for me
$.urlParam = function(name){
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
return results[1] || 0;
}
so if your url is http://www.yoursite.com?city=4
try this
console.log($.urlParam('city'));
Perhaps you might want to give Dentist JS a look? (disclaimer: I wrote the code)
code:
document.URL == "http://helloworld.com/quotes?id=1337&author=kelvin&message=hello"
var currentURL = document.URL;
var params = currentURL.extract();
console.log(params.id); // 1337
console.log(params.author) // "kelvin"
console.log(params.message) // "hello"
with Dentist JS, you can basically call the extract() function on all strings (e.g., document.URL.extract() ) and you get back a HashMap of all parameters found. It's also customizable to deal with delimiters and all.
Minified version < 1kb
I hope this will help.
<script type="text/javascript">
function getParameters() {
var searchString = window.location.search.substring(1),
params = searchString.split("&"),
hash = {};
if (searchString == "") return {};
for (var i = 0; i < params.length; i++) {
var val = params[i].split("=");
hash[unescape(val[0])] = unescape(val[1]);
}
return hash;
}
$(window).load(function() {
var param = getParameters();
if (typeof param.sent !== "undefined") {
// Do something.
}
});
</script>
Try this working demo http://jsfiddle.net/xy7cX/
API:
inArray : http://api.jquery.com/jQuery.inArray/
This should help :)
code
var url = "http://myurl.com?sent=yes"
var pieces = url.split("?");
alert(pieces[1] + " ===== " + $.inArray("sent=yes", pieces));
This will give you a nice object to work with
function queryParameters () {
var result = {};
var params = window.location.search.split(/\?|\&/);
params.forEach( function(it) {
if (it) {
var param = it.split("=");
result[param[0]] = param[1];
}
});
return result;
}
And then;
if (queryParameters().sent === 'yes') { .....
This might be overkill, but there is a pretty popular library now available for parsing URIs, called URI.js.
Example
var uri = "http://example.org/foo.html?technology=jquery&technology=css&blog=stackoverflow";
var components = URI.parse(uri);
var query = URI.parseQuery(components['query']);
document.getElementById("result").innerHTML = "URI = " + uri;
document.getElementById("result").innerHTML += "<br>technology = " + query['technology'];
// If you look in your console, you will see that this library generates a JS array for multi-valued queries!
console.log(query['technology']);
console.log(query['blog']);
<script src="https://cdnjs.cloudflare.com/ajax/libs/URI.js/1.17.0/URI.min.js"></script>
<span id="result"></span>
function GetRequestParam(param)
{
var res = null;
try{
var qs = decodeURIComponent(window.location.search.substring(1));//get everything after then '?' in URI
var ar = qs.split('&');
$.each(ar, function(a, b){
var kv = b.split('=');
if(param === kv[0]){
res = kv[1];
return false;//break loop
}
});
}catch(e){}
return res;
}
So simple you can use any url and get value
function getParameterByName(name, url) {
if (!url) url = window.location.href;
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
Usage Example
// query string: ?first=value1&second=&value2
var foo = getParameterByName('first'); // "value1"
var bar = getParameterByName('second'); // "value2"
Note: If a parameter is present several times (?first=value1&second=value2), you will get the first value (value1) and second value as (value2).
There's this great library:
https://github.com/allmarkedup/purl
which allows you to do simply
url = 'http://example.com?sent=yes';
sent = $.url(url).param('sent');
if (typeof sent != 'undefined') { // sent exists
if (sent == 'yes') { // sent is equal to yes
// ...
}
}
The example is assuming you're using jQuery. You could also use it just as plain javascript, the syntax would then be a little different.
http://example.com?sent=yes
Best solution here.
function getUrlParameter(name) {
name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
var results = regex.exec(location.href);
return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
};
With the function above, you can get individual parameter values:
getUrlParameter('sent');
This is based on Gazoris's answer, but URL decodes the parameters so they can be used when they contain data other than numbers and letters:
function urlParam(name){
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
// Need to decode the URL parameters, including putting in a fix for the plus sign
// https://stackoverflow.com/a/24417399
return results ? decodeURIComponent(results[1].replace(/\+/g, '%20')) : null;
}
There is another example with using URI.js library.
Example answers the questions exactly as asked.
var url = 'http://example.com?sent=yes';
var urlParams = new URI(url).search(true);
// 1. Does sent exist?
var sendExists = urlParams.sent !== undefined;
// 2. Is it equal to "yes"?
var sendIsEqualtToYes = urlParams.sent == 'yes';
// output results in readable form
// not required for production
if (sendExists) {
console.log('Url has "sent" param, its value is "' + urlParams.sent + '"');
if (urlParams.sent == 'yes') {
console.log('"Sent" param is equal to "yes"');
} else {
console.log('"Sent" param is not equal to "yes"');
}
} else {
console.log('Url hasn\'t "sent" param');
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/URI.js/1.18.2/URI.min.js"></script>
Coffeescript version of Sameer's answer
getUrlParameter = (sParam) ->
sPageURL = window.location.search.substring(1)
sURLVariables = sPageURL.split('&')
i = 0
while i < sURLVariables.length
sParameterName = sURLVariables[i].split('=')
if sParameterName[0] == sParam
return sParameterName[1]
i++
A slight improvement to Sameer's answer, cache params into closure to avoid parsing and looping through all parameters each time calling
var getURLParam = (function() {
var paramStr = decodeURIComponent(window.location.search).substring(1);
var paramSegs = paramStr.split('&');
var params = [];
for(var i = 0; i < paramSegs.length; i++) {
var paramSeg = paramSegs[i].split('=');
params[paramSeg[0]] = paramSeg[1];
}
console.log(params);
return function(key) {
return params[key];
}
})();
I use this and it works.
http://codesheet.org/codesheet/NF246Tzs
function getUrlVars() {
var vars = {};
var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
vars[key] = value;
});
return vars;
}
var first = getUrlVars()["id"];
With vanilla JavaScript, you could easily take the params (location.search), get the substring (without the ?) and turn it into an array, by splitting it by '&'.
As you iterate through urlParams, you could then split the string again with '=' and add it to the 'params' object as object[elmement[0]] = element[1]. Super simple and easy to access.
http://www.website.com/?error=userError&type=handwritten
var urlParams = location.search.substring(1).split('&'),
params = {};
urlParams.forEach(function(el){
var tmpArr = el.split('=');
params[tmpArr[0]] = tmpArr[1];
});
var error = params['error'];
var type = params['type'];
What if there is & in URL parameter like filename="p&g.html"&uid=66
In this case the 1st function will not work properly. So I modified the code
function getUrlParameter(sParam) {
var sURLVariables = window.location.search.substring(1).split('&'), sParameterName, i;
for (i = 0; i < sURLVariables.length; i++) {
sParameterName = sURLVariables[i].split('=');
if (sParameterName[0] === sParam) {
return sParameterName[1] === undefined ? true : decodeURIComponent(sParameterName[1]);
}
}
}
Admittedly I'm adding my answer to an over-answered question, but this has the advantages of:
-- Not depending on any outside libraries, including jQuery
-- Not polluting global function namespace, by extending 'String'
-- Not creating any global data and doing unnecessary processing after match found
-- Handling encoding issues, and accepting (assuming) non-encoded parameter name
-- Avoiding explicit for loops
String.prototype.urlParamValue = function() {
var desiredVal = null;
var paramName = this.valueOf();
window.location.search.substring(1).split('&').some(function(currentValue, _, _) {
var nameVal = currentValue.split('=');
if ( decodeURIComponent(nameVal[0]) === paramName ) {
desiredVal = decodeURIComponent(nameVal[1]);
return true;
}
return false;
});
return desiredVal;
};
Then you'd use it as:
var paramVal = "paramName".urlParamValue() // null if no match
If you want to find a specific parameter from a specific url:
function findParam(url, param){
var check = "" + param;
if(url.search(check )>=0){
return url.substring(url.search(check )).split('&')[0].split('=')[1];
}
}
var url = "http://www.yourdomain.com/example?id=1&order_no=114&invoice_no=254";
alert(findParam(url,"order_no"));
Another solution that uses jQuery and JSON, so you can access the parameter values through an object.
var loc = window.location.href;
var param = {};
if(loc.indexOf('?') > -1)
{
var params = loc.substr(loc.indexOf('?')+1, loc.length).split("&");
var stringJson = "{";
for(var i=0;i<params.length;i++)
{
var propVal = params[i].split("=");
var paramName = propVal[0];
var value = propVal[1];
stringJson += "\""+paramName+"\": \""+value+"\"";
if(i != params.length-1) stringJson += ",";
}
stringJson += "}";
// parse string with jQuery parseJSON
param = $.parseJSON(stringJson);
}
Assuming your URL is http://example.com/?search=hello+world&language=en&page=3
After that it's only a matter of using the parameters like this:
param.language
to return
en
The most useful usage of this is to run it at page load and make use of a global variable to use the parameters anywhere you might need them.
If your parameter contains numeric values then just parse the value.
parseInt(param.page)
If there are no parameters param will just be an empty object.
$.urlParam = function(name) {
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
return results[1] || 0;
}
use this
$.urlParam = function(name) {
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
return results[1] || 0;
}
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('');
}
i have page that do add new record by old way ajax, this code was add new record and return the error or done result message , how can i print the message on div and print result on other div. i try but some one tell me to use JOSN, how can i do that
<script language="JavaScript">
$(document).ready(function() {
});
$("#closeerr").live('click', function() {
$("#gadget").hide();
});
var HttPRequest = false;
function doCallAjax(Mode,Page,ID) {
HttPRequest = false;
if (window.XMLHttpRequest) { // Mozilla, Safari,...
HttPRequest = new XMLHttpRequest();
if (HttPRequest.overrideMimeType) {
HttPRequest.overrideMimeType('text/html');
}
} else if (window.ActiveXObject) { // IE
try {
HttPRequest = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
HttPRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!HttPRequest) {
alert('Cannot create XMLHTTP instance');
return false;
}
var url = 'AjaxItemsGroupsRecord.php';
var pmeters = "titems_groups_GroupName=" + encodeURI( document.getElementById("items_groups_GroupName").value) +
"&titems_groups_sys_type_ID=" + encodeURI( document.getElementById("items_groups_sys_type_ID").value ) +
'&myPage='+Page +
"&tID=" + ID +
"&tMode=" + Mode;
HttPRequest.open('POST',url,true);
HttPRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
HttPRequest.setRequestHeader("Content-length", pmeters.length);
HttPRequest.setRequestHeader("Connection", "close");
HttPRequest.send(pmeters);
HttPRequest.onreadystatechange = function()
{
if(HttPRequest.readyState == 3) // Loading Request
{
document.getElementById("mySpan").innerHTML = "looding";
}
if(HttPRequest.readyState == 4) // Return Request
{
document.getElementById("mySpan").innerHTML = HttPRequest.responseText;
}
}
}
</script>
If jQuery is an option... As mentioned in my comment I'd recommend you try out jQuery http://jquery.com/ as you look to be fairly new to JavaScript.
It makes AJAX requests a lot simpler and you don't have to worry about making XMLHttpRequest work cross browser.
For making an actual AJAX request see: http://api.jquery.com/jQuery.ajax/
Now if you want to use JSON you need to convert the data to return in your PHP script.
This is really easy, you just pass the data in json_encode() and it will convert the data to a JSON string. You then just echo it out so that it's returned to the AJAX request.
echo json_encode($data);
Now if you've setup your AJAX request to expect a JSON response then you can use the data that comes back. So something like this:
$.ajax({
url: 'request.php', // the php you want to call
dataType: 'json' // the type of data being returned
}).done(function(json) {
// you now have a json object
});
If you can only use native JavaScript...
If you can't use jQuery then it roughly works the same way. You'd have the code in your example for the AJAX request. You'd still use json_encode() in the PHP. The only difference is when the data comes back you'd need to parse it like so:
JSON.parse(json);
For more info on this last bit checkout: Parse JSON in JavaScript?
I am using a web app called ProcessMaker.
They do not have support for jquery. So I had to figure out how to integrate it myself. There were lots of people on their forums trying to get it done, so thankfully it now has been documented. If anyone would like to do so here is the link where I have detailed the process: jQuery with ProcessMaker
My question is now using the jquery ajax request.
In order to use jquery with processmaker I had to overcome 2 problems. The first the Smarty filtering since processmaker uses templating langauge. And the second the Maborak lib doesn't allow certain things.
So now I believe it to be a maborak issue, but I do not know for certain. All I know when I try to run my code, the error console (firefox 4.x) gives me the following error: jqXHR[i] is not a function.
This is happening at line 7323 of my jquery lib that I included (version 1.6.2).
I have Googled, and all I have come up with so far is that people are saying it can possibly be a befreSend issue and that disabling it fixes it.
Maybe I don't know how to disable it properly, but it isnt working still.
If anyone can help me with this, it would be very greatly appreciated.
Thanks,
Zedd
In Processmaker exist a library "makorak" this library generate problems with other libraries.. hence you Should use jquery as follows...
var $JQ = jQuery.noConflict();
$JQ("#myField").value = 'cochalo';
hope I've helped
Try this:
$.noConflict();
jQuery(document).ready(function($)){
$("button").click.function(){
$("p").text("jquery is still working");
}
}
before:
you need declare this:
var $j = jQuery.noConflict();
and... you must don't use $() any more
instead:
use $j()
example:
// Use jQuery via $j(...)
$j(document).ready(function() {
$j("div").hide();
});
that's all
read new documentation about ajax in dynaform in this
or
Write this function
function ajax(url, callback, error, method, cache, async) {
async = async || true;
//alert(cache);
if (typeof(cache) == 'undefined') {
cache = false;
}
if (typeof(method) == 'undefined') {
method = 'GET';
}
if (window.XMLHttpRequest) // code for IE7+, Firefox, Chrome, Opera, Safari
{
xmlhttp = new XMLHttpRequest();
} else // code for IE5, IE6
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {
if (typeof(callback) == 'function') {
callback(xmlhttp.responseText);
}
} else {
if (typeof(error) == 'function') {
error(xmlhttp.status);
} else {
alert('خطا : لطفا مجددا تلاش کنید.');
}
}
}
}
var d = new Date();
var n = d.getTime();
var getExplode = url.split("?");
scriptName = url;
param = '';
if (getExplode.length > 1) {
scriptName = getExplode[0];
param = getExplode[1];
if (cache == false) {
param = param + "&n=" + n;
}
} else {
if (cache == false) {
param = param + "n=" + n;
}
}
if (method.toLowerCase() == 'post') {
xmlhttp.open("POST", scriptName, async);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.send(param);
} else {
xmlhttp.open("GET", scriptName + '?' + param, async);
xmlhttp.send();
}
}
and use it like this
var url = ajaxUrl + "OperationRenovation.php?Command=GetDetail&IdDarkhast=" + ID + "&Code=" + Code + "&Mabna=" + Mabna;
ajax(url, function(Response) {
alert(response);
}, function() {
alert('مشکل در برقراری ارتباط با سرور');
}, 'post');