convert two-dimensional php array to JavaScript [closed] - php

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I have a two-dimensional php array, $phpar, in which both dimensions are indexed (0,1,2,...), and all values are plain text. Within a JavaScript function, I want to convert this array into a two-dimensional JavaScript array. I know the following code doesn't work, but it illustrates what I want to do.
jsfunction() {
var jsarray = new Array();
jsarray = <?php json_encode($phpar); ?>;
}
If the returned value is something other than a regular js array, like a JSON string, I need some help parsing that into what I want, please.

Answer 1

I'm not exactly sure where your problem is...but the basic operation of json_encode simply looks like:
<script type="text/javascript">
var jsarray = <?php echo json_encode($phpar); ?>;
</script>
Frankly, I don't see why the other people are suggesting throwing a javascript-compatible object/array into a string, and worse the way they did it is wrong. If you want a JSON object string, this is the correct way of doing it:
<script type="text/javascript">
var jsarray_string = <?php echo json_encode(json_encode($phpar)); ?>;
// ^ ^------ php array to js array
// '------------------ php string to js string
</script>
By the way, javascript objects can be accessed like arrays. Example:
var myArray = {1: 'hi', 2: 'bye'};
alert(myArray[2]); // this works!
The only difference is that myArray is not really a javascript array, eg, myArray.constructor is not Array().

Answer 2

What are you actually trying accomplish here in terms of you application's functionality?
PHP is a backend language and JavaScript is a frontend language. If you need the frontend to retrieve an object from the backend to use in your JavaScript you should use Ajax as opposed to putting PHP code inside your JavaScript.
Your Ajax method will call the relevant PHP method using an MVC-style URL ('/mycontroller/mymethod'). The PHP method should use use associative array(s) since JSON objects are key-value pairs. You should json_encode the array before returning it.
Here's some sample PHP code:
<?php #foo.php
public function bar() {
$array = ('first-name' => 'John', 'last-name' => 'Doe');
return json_encode($array);
}
On the frontend, your JSON object will consist of the same key value pairs as your associative array:
var getBar = function() {
$.get('/foo/bar', function(data) {
var string = 'My name is ' + data.first-name + ' ' + data.last-name';
alert(string);
}, json);
};