You can convert the PHP object to an array, and then use JSON function to encode it. After that, decode it from JavaScript

1. Code:

 <?php
class MyExample implements JsonSerializable {
    public $title = 'Convert object php to JS';
    public $content = 'this example will you convert an object php to object javascript';

    public function jsonSerialize () {
        return array(
            'title'=>$this->title,
            'content'=>$this->content
        );
    }
}

$myExampleInstance= new MyExample();
$myExample = json_encode($myExampleInstance); // {"title":"Convert object php to JS","content":"this example will you convert an object php to object javascript"}
echo $myExampleInstance;
?> 
<script>
var data = '<?php echo json_encode($myExampleInstance); ?>';
var obj = JSON.parse(data);
alert(obj.title);
alert(obj.content);
</script>

2. Basic steps:

You can convert the PHP object to an array, and then use JSON function to encode it. After that, decode it from JavaScript. Here are some basic steps:

1. Convert the PHP object to an array.
2. Using json_encode() to encode that PHP array.
3. Pass JSON-encoded data to PHP
4. Decode JSON from JavaScript using JSON.parse or you can use jQuery.parseJSON to do that.