- var_dump: documentation ( source)
- json_decode: documentation ( source)
- filter_input: documentation ( source)
<?php
$_POST['items'] = '[["#1","[d][fA]",1,6,0],["#2","[d][mA]+",1,6,0]]';
$items = filter_input( INPUT_POST, 'items', FILTER_SANITIZE_STRING );
var_dump( json_decode($items) );