Ok, I know there were many of those but my code just won't work... I tried solutions found on Stack but still...
I would like to transfer my array built in jQuery to my php script that will compare it with other array etc.
My jQuery code looks like this:
$.post('rezultat.php',{wyb: JSON.stringify(wybrane)});
and in my rezultat.php file I try to decode it:
$wyb = json_decode($_POST['wybrane']);
I tried the $_POST method before, with no results. What am I doing wrong?
You need to use $_POST['wyb'] instead of $_POST['wybrane'] in your php script, since you used 'wyb' key in the array you created in javascript.
You are calling the parameter with his Javascript name, try to call with the $_POST name:
$wyb = json_decode($_POST['wyb']);
Related
I'm working on autofilling an html form based on data from a sqlite database.
I'm using a modified version of the code from this site and in its basic feature it works as expected.
The main input element calls, "onkeyup", a javascript function called "lookup", that in turn calls a external php script passing the current string to query the database.
The script returns a string to update the input form:
echo '<li onClick="fill(\''.$result->value.'\');">'.$result->value.'</li>';
The javascript function "fill" is as follows:
function fill(thisValue) {
$('#inputString').val(thisValue);
setTimeout("$('#suggestions').hide();", 200);
"#inputstring" is simply an input element.
What I would like to do instead of returning a string is to return an array and parse it inside the "fill" function to assign the different values to different elements in html.
The problem is that to pass the php array to javascript I have to convert it somehow. I've tried to make it a json string as suggested many times here on stack, but for what I suppose is a problem of quotes, it always return a null value.
I've tried:
$valuetopass = json_encode($query_result);
whithout
echo '<li onClick="fill('.$valuetopass.');">'.$query_result['text'].'</li>';
and with quotes
echo ''.$query_result['text'].'';
And both fail.
I'm aware that similar question have been already asked 1, 2,ecc... But all of the answers suggest to embed php when assigning the javascript variable. In my case the php is called from the function "lookup" and from that php script I want to return to the function "fill".
How can I produce from inside php a string that includes a json string with a format that can be passed to the "fill" function?
Or alternatively how can I rework the problem so that I don't need to do it at all?
Your JSON string is likely to contain ", so of course you get a syntax problem when you insert that into onClick="fill(...);" untreated.
Using PHP’s htmlspecialchars should be able to fix this in this instance.
In the long term, you might want to look more into the separation of code and data though.
Attaching event handlers using inline HTML attributes is kinda “old-school”, today that should rather be done from inside the script, using addEventListener resp. whatever wrapper methods a JS framework might provide for that. The JSON data could then for example be put into a custom data attribute, so that the script can read the data from there.
Let's say i want to open a PHP page and without another request, pass some JSON data directly to the browser, so it will be accessible to my Javascript functions.
I don't know the right way to do it, but what i do currently is something like this :
<textarea id="mydata" style:"display:none">[{code:1,name:'John'},{code:2,name:'Mary'},{code:3,name:'Paul'}]</textarea>
I put the data inside a invisible textarea and now the data inside 'mydata' textarea is accessible by JS doing something like this :
var myData = JSON.parse($('#mydata').val());
Although this works, somehow it does not seem to me the right way to do it... I know i could avoid to 'dirty' the html code by getting the data using Ajax after the page opens, but what i'm trying to do here is avoid more requests, so with only one request, everything will be accessible. Actually in my application i have about 5 textareas like these, so with only 1 request to the server i get all data needed.
Thanks
From PHP's perspective, there is no difference between this:
<textarea id="mydata" style:"display:none">[{code:1,name:'John'},{code:2,name:'Mary'},{code:3,name:'Paul'}]</textarea>
and this:
var myData = [{code:1,name:'John'},{code:2,name:'Mary'},{code:3,name:'Paul'}];
Both of the above take the form of:
[a string][the serialized object][a string]
Whether you're surrounding the values with HTML or with JavaScript, that surrounding decoration is just raw output strings as far as PHP is concerned. So there's no need to add the extra step of outputting the JSON to a form element and then using JavaScript to get the form element's value as a string and parse it back to an object. You can just emit the object itself directly to JavaScript code.
how to send Array value from server?
If I send it like this:
"a","b","c"
then in JavaScript (after GET and Alert) I have only "a", for example:
$.get('xx', function(labels){
alert(labels); // <- here I have only "a"
});
how to receive all 3 values from server?
Thanks
OK it is solved using:
JSON.parse(labels)
thanks to everybody!
If you want it to be done using pure javascript,you can do this.
Since you have not mentioned which server side language you using,I will show with JSP.
First store your array in a javascript variable.
var x=new Array();
x="<%=Serverarray%>"
This will give an output like this "[a,b,c]"
In order to retrieve values from the database you need to use x[0],x[1].....
x[0]=a;
x[1]=b;
x[2]=c;
I saw this string from an ajax call on some. It's clearly some sort of template. a:15 means there're 15 items in the {} expression. i:0 means item0, s:63: means the length of the string after it. I google for a while, but could not find any JS template engine that can take input like this one. It is possible they use Regex to parse the data.
a:15:{i:0;s:63:\"http://ww2.some.web/mw600/c01b8166jw1e4cf9fu2s0j20dw08v0v4.jpg\";i:1;s:63:\"http://ww4.some.web/mw600/c01b8166jw1e4cf9h284bj20dw0980ut.jpg\";i:2;s:63:\"http://ww1.some.web/mw600/c01b8166jw1e4cf9ksczrj20dw097n20.jpg\";i:3;s:63:\"http://ww3.some.web/mw600/c01b8166jw1e4cf9jvzymj20dw09840f.jpg\";i:4;s:63:\"http://ww2.some.web/mw600/c01b8166jw1e4cf9m9j9rj20dw0av41i.jpg\";i:5;s:63:\"http://ww3.some.web/mw600/c01b8166jw1e4cf9n1iq2j20dw0990ue.jpg\";i:6;s:63:\"http://ww2.some.web/mw600/c01b8166jw1e4cf9q062tj20dw09en17.jpg\";i:7;s:63:\"http://ww3.some.web/mw600/c01b8166jw1e4cf9sprglj20dw0a1djh.jpg\";i:8;s:63:\"http://ww1.some.web/mw600/c01b8166jw1e4cf9srts5j20dw097jui.jpg\";i:9;s:63:\"http://ww2.some.web/mw600/c01b8166jw1e4cf9wj84oj20dw08zn02.jpg\";i:10;s:63:\"http://ww1.some.web/mw600/c01b8166jw1e4cf9ws795j20dw09o418.jpg\";i:11;s:63:\"http://ww3.some.web/mw600/c01b8166jw1e4cf9xpixhj20dw0990ty.jpg\";i:12;s:63:\"http://ww3.some.web/mw600/c01b8166jw1e4cfa05o8fj20dw099die.jpg\";i:13;s:63:\"http://ww4.some.web/mw600/c01b8166jw1e4cfa0ah9yj20dw0aa76h.jpg\";i:14;s:63:\"http://ww3.some.web/mw600/c01b8166jw1ehttp://ww2.some.web/mw600/c01b8166jw1e4cf9fu2s0j20dw08v0v4.jpgcfa1jpsaj20dw099myq.jpg\";}
Looks like result of PHP serialize() function
You can use this js function to parse it.
This is PHP serialization format. You can unserialize with php:
unserialize(...)
And you'll get an array (with your example) if I'm not wrong
I have an array I've created in JavaScript. The end result comes out to element1,element2,,,element5,element6,,,element9.... etc
Once passed to ColdFusion, it removes the null elements, I end up with element1,element2,element5,element6,element9
I need to maintain these spaces, any ideas? My problem may begin before this, to explain in more detail...
I have a form with 13 elements that are acting as a search/filter type function. I want to "post" with AJAX, in essence, i'm using a button to call a jQuery function and want to pass the fields to a ColdFusion page, then have the results passed back. The JavaScript array may not even be my best option.
Any ideas?
Are you deserializing the jS array into a list? CF ignores empty list fields using its built-in functions. This can be worked around by processing the text directly. Someone has already done this for you, fortunately. There are several functions at cflib.org, like:
ListFix
ListLenIncNulls
etc, etc, etc.
In exchanging data between javascript and coldfusion have a look at using JSON.
http://www.json.org
http://www.epiphantastic.com/cfjson/
Instead of using the CF ListToArray function, use the Java String methods to split the string into an array. This will maintain the empty list items.
<cfset jsList = "item1,item2,,item4,item5,,item6">
<cfset jsArray = jsList.split(",")>
<cfdump var="#jsArray#">
you are using array in JavaScript,Fine. instead of assigning by default empty value,assign some dummy value. whenever you use this array value ignore dummy value using condition.