Question

This is how I got my php array to javascript

echo 'var daysofweek = '.json_encode($daysofweek).';';

Now I am aware that json_decode can do the opposite, however the problem is I don’t know the syntax to do so.

I tried:

<script>
var array_days = new Array();

array_days[] = "psdfo";
array_days[] = "bsdf";

<?php
$array_days = json_decode(?>array_days<?php);?>

</script>

yes im clueless.

I forgot to mention that I want to send an array through post, having all my information regarding all the form values dynamically created by javascript. Otherwise, I wouldn’t know which name=”” to look for as it will be decided by the user. Unless someone else has an alternative solution…

Answer 1

<script>
var array_days = new Array();

array_days[] = "psdfo";
array_days[] = "bsdf";

<?php
$array_days = json_decode(?>array_days<?php);?>

</script>

I’m clueless in this part… is this javascript? if so, you need to use a JSON Parser like the JSON2.js https://github.com/douglascrockford/JSON-js

this file creates a Javascript JSON Object which allows you to parse a JSON string to a Javascript object. (you can always use eval() but it won’t prevent against possible malicious code…) or the other way around… from a Javascript Object transform into a JSON string.

After converting to a JSON string you just need to send the data through AJAX to a PHP file, like:

var data = {
   key: value,
   key2: value2 
},
JSON = JSON.stringify(data);

$.ajax({
    url: 'php_file.php',
    type: 'POST',
    data: JSON,
    success: function(data){
        alert(data)
    }
});

(I’m using jQuery to save some lines…)

Then on the php_file.php you would have something like this:

<?php 
    $json = json_decode($_POST['data']);

    foreach($json as $value){
       //Do something with it!
    }
?>