- var_dump: documentation ( source)
- json_decode: documentation ( source)
<?php
$string = '"{\"vehiclePlate\":\"cf97457\",\"emailAddress\":\"simone.campigli@facile.it\",\"includeCard\":\"1\",\"applicantEmail\":\"simone.campigli@facile.it\"}"';
$d = json_decode($string, true);
var_dump($d);