- var_dump: documentation ( source)
- json_decode: documentation ( source)
- json_encode: documentation ( source)
<?php
$data = array( 'value' => 123, 'value2'=>1234567890123456789 );
$enc = json_encode($data);
$dec = json_decode( $enc, true );
var_dump( ($data['value2'] === $dec['value2']) );