JSon object value from PHP

Question

Dear All I am using Json in php, Now I need to access it from javascript, How to pass json object ,to javascript?

       <?php
       $array = array("a"=>"Caucho", "b"=>"Resin", "c"=>"Quercus");
       $json = json_encode($array);
       >

   Where My.js has

      showAll(){

       alert("Show All Json Objects");
       // How to get the json value here

        }

Anyone help me how to do it?

Answer 1

You could request the JSON data with AJAX or you could pass the data from PHP to JavaScript as a JavaScript variable:

$array = array("a"=>"Caucho", "b"=>"Resin", "c"=>"Quercus");
$json = json_encode($array);

echo '<script type="text/javascript">';
echo 'var myJson = "' . $json . '";';
echo '</script>';

edit: you have to eval the json string, otherwise you will just have a string not a object...

Off course keeping in mind all the guidelines about mixing PHP/HTML/JavaScript...

Answer 2

Assuming that your using Ajax as your method to download the json, you would echo the result of the json_encode:

<?php

 $array = array("a"=>"Caucho", "b"=>"Resin", "c"=>"Quercus");

 echo json_encode($array);

?>

and then within your call back event, you'd eval the response:

var obj = eval('(' + req.ResponseText + ')');
for(var i in obj) {
 alert(i + ': ' + obj[i]);
}

Assuming that you have an XMLHttpRequest object with the name req.

hth

Gavin

Answer 3

<?php
$array = array("a"=>"Caucho", "b"=>"Resin", "c"=>"Quercus");
$json = json_encode($array);
?>
<script type="text/javascript">
var myjson = <?php echo $json; ?>;
</script>